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bruce356
28th August 2013, 04:51 AM
They are 50mm longer than DJI arms and weight per mm is the same.
http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=76_155&products_id=1800

Regards - bruce

ulkar
28th August 2013, 07:48 AM
too expensive for what it is

Trappy
28th August 2013, 08:15 AM
wrote him an e-mail and had a quick call with him. I agree, they're expensive at the moment. will definitely need to look into this with him.

pframon
29th August 2013, 03:57 AM
I like...go ahead Trappy...

rainmaker
29th August 2013, 04:28 AM
Looks interesting...

bruce356
29th August 2013, 04:32 AM
Hi Guys, just a thought because they are 50mm longer how would things improve if they were used only for the rear of the Discovery. This would improve battery weight carrying capacity and perhaps eliminate or reduce the problems associated with fast Yaw when the disco is hovering (stationery).
Trappy you are the engineer what are your thoughts.
Thanks and regards - bruce

Trappy
29th August 2013, 04:41 AM
it should definitely improve the yaw. not sure about pitch though. the CG spot would certainly change... might require a lighter battery.

PDXDave
29th August 2013, 08:36 AM
Not to be a downer or anything, but wasn't one of the original design assumption that the plastic arms were designed failure point in the event of a crash, so that less of the force would be transferred to plates? Wouldn't these arms place more stress on the expensive bits in the event of an "unscheduled aircraft/ground event"? Maybe I'm the only one that wrecks quads around here. ;)

Trappy
29th August 2013, 09:21 AM
no, not at all. this is obviously something you'd need to take into account. this removes the "point of failure". aluminum bends and doesn't break, which can do devestating things to the rest of your frame. however, I guess what people are hoping for is better flight characteristics. as with everything ... it's a tradeoff :)

I'm still waiting on a reply from the guy. last I heard was he needs to talk this over with Tim from RMRC, which probably means this will not play out well for TBS or the designer :)

Derrick
29th August 2013, 09:59 AM
Aluminum is horrible material for transmission of vibrations...

bruce356
29th August 2013, 11:23 AM
31651The following image is a very crude representation obviously, but by adding 50mm to the rear legs the discovery becomes Symmetrical (almost) and the center of gravity moves back to where it is originally marked on the bottom plate (instead of 15mm forward).

This would be very interesting to test, how it would affect flight performance of the discovery. Because COG is moved back, a slightly heavier battery could be carried without upsetting the balance.

Hope you have some luck with the designer, or get them made in china would be cheaper.

Regards - bruce

Trappy
29th August 2013, 12:30 PM
31651The following image is a very crude representation obviously, but by adding 50mm to the rear legs the discovery becomes Symmetrical (almost) and the center of gravity moves back to where it is originally marked on the bottom plate (instead of 15mm forward).

This would be very interesting to test, how it would affect flight performance of the discovery. Because COG is moved back, a slightly heavier battery could be carried without upsetting the balance.

Hope you have some luck with the designer, or get them made in china would be cheaper.

Regards - bruce
well, if they are any good they'll be made in china anyway. if by the designer or by "goodluck-rctimer-hobbyking" is up to him :)

SecretSpy711
29th August 2013, 03:36 PM
Aluminum is horrible material for transmission of vibrations...

you mean it's GREAT for transmission of vibrations, horrible at damping them out ;-)

Derrick
29th August 2013, 03:45 PM
you mean it's GREAT for transmission of vibrations, horrible at damping them out ;-)

That is correct... to be clear, DON'T USE ALUMINUM ARMS IF YOU CARE ABOUT VIBRATION DAMPING.

Sure they look cool, and as stated they will give more yaw authority (but so will longer plastic or wood arms). At the expense of decreased vibration damping.

swillhide
29th August 2013, 03:51 PM
You must respect my authority!

londonguy
17th September 2013, 11:24 AM
MAYMIDROIX, are you anything to do with the AIMDROIX arms? If you are.... perhaps you could read this thread and address some concerns?

Just noticed they are also thinner than regular arms. I really wonder if you could make them any worse for people to buy as a drop in replacement.... Longer, thinner, requiring spacers? What about making them of chocolate...

If you look at a DJI arm and frame you will see that the plate and arms clamp together and the arms have a LIP which the plate buts up against tightly. I am convinced that a tight fit is crucial for a strong connection. I really would not like to add some spacers to my quad.

rlage
17th September 2013, 11:41 AM
could be interesting for those who would like to try other motors instead of 22xx ones.

MAYMIDROIX
17th September 2013, 12:40 PM
MAYMIDROIX, are you anything to do with the AIMDROIX arms? If you are.... perhaps you could read this thread and address some concerns?

I'm the designer of the arms. I will start answering some of the concerns that were discussed here.

Just noticed they are also thinner than regular arms. I really wonder if you could make them any worse for people to buy as a drop in replacement.... Longer, thinner, requiring spacers? What about making them of chocolate...


When I first designed these arms what I had in mind was to make the arm as easy as possible. The manufacturing ideas that I thought behind this design is what did the arm to be at a price that is accessible and made in the U.S. Because of this, the arms needed to be manufactured a bit thinner in height than the plastic arms. The idea of making them longer is that people where buying extension plates for the DJI arms that are only about half the price of the arms so I wanted to include that advantage on my design. I think that making them out of chocolate would be delicious so I will consider it in the near future. ;)

If you look at a DJI arm and frame you will see that the plate and arms clamp together and the arms have a LIP which the plate buts up against tightly. I am convinced that a tight fit is crucial for a strong connection. I really would not like to add some spacers to my quad.

The aluminum arms will have the same clamping force that you get with the plastic arms. How will you connect the battery of the TBS if the arms where exactly the same height as the DJI arms?
Thanks that you'll use the spacers is possible to hard wire the battery to the TBS battery tabs.
CNC machining is very expensive, so to machine an arm to include the spacers on the design would have cost more than $100 a piece. Just think about all the material that would need to be removed just the increase the height to match the stock DJI arm. The spacers don't make the connection to be weaker than with the plastic arms.

I appreciate your feedback.

www.aimdroix.com

Trappy
17th September 2013, 01:33 PM
MAYMIDROIX, what you're saying is that these will not be 37mm tall? we may need to make custom spacers for these arms then. and the camera plate won't fit!

Trappy
18th September 2013, 02:35 AM
no, I mean spacers between the DISCOVERY top and bottom plates. We have 8 of these installed to strengthen the frame. these are 37mm tall and thus require the arms to be also. Maybe I'm just missing the point :) please provide some photos of your DISCO.

ulkar
18th September 2013, 03:57 AM
I think what MAYMIDROIX says is that he has spacers to put between the bottom of his arm and the top of the bottom plate of the disco to make the height 37mm as if it were a discovery arm

Trappy
18th September 2013, 04:52 AM
gotcha. although this worries me a bit, there may be slop. a picture would explain the setup and maybe address my concern about the stability.

MAYMIDROIX, are you having these milled out of a square block?

bruce356
18th September 2013, 07:29 AM
Your a wally Maymidroix, there was no mention in your intro to these arms that they were not standard DJI height (no dimensions given except 50mm longer), I have ordered mine without that knowledge, otherwise I would have ordered the spacers at the same time, now I have to make up something myself, its not worth another $13 shipping for this amateur solution using bushes/sleeves.
http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=76_155&products_id=1932&zenid=4dbbedd071107ba3180e914e8e8651b9

londonguy
18th September 2013, 08:52 AM
Remake your arms STANDARD height and standard length and you would have sold out of your first batch by now.

Trappy
18th September 2013, 08:55 AM
in all fairness I think it's already sold out :) at least RMRC shows negative stock.

ERIC'sFPV
19th September 2013, 03:46 AM
I swung by RMRC today and picked up my arms. I used my harvested Disco as my test bed. I didnt feel like taking apart my Pro for testing. Im going to use all stock DJI motor/ESC's and a NAZA first gen. As this is going to just be a test, Im not going for long range. TBS green horn and DX8 only.

First thing i think about them is that they are nice looking. I got the all black ones. I had them sitting on my passenger seat and every red light I picked one up and would fiddle with it.
This is a comparison between the two arms
http://i731.photobucket.com/albums/ww312/08sut/IMG_3245_zpsa9a23067.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3245_zpsa9a23067.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3246_zps9291bdff.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3246_zps9291bdff.jpg.html)

While i was there i asked about the spacers. If u use these on a Disco/Disco pro, you need the spacers. Where the positive battery is soldered to the bottom plate the bottom of the arm would contact it and probaly cause a short. Needless to say i left with some.
http://i731.photobucket.com/albums/ww312/08sut/IMG_3247_zps0d61a816.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3247_zps0d61a816.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3251_zps5ff127f2.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3251_zps5ff127f2.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3253_zpse0a570c5.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3253_zpse0a570c5.jpg.html)

Here you can see a good comparison on the difference in the arms installed. I think with the arms on the rear only, It will look more square.
http://i731.photobucket.com/albums/ww312/08sut/IMG_3250_zps3b1e253d.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3250_zps3b1e253d.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3252_zps0b713d9d.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3252_zps0b713d9d.jpg.html)

There is NO leg on the arm. This is a problem if you dont have anything to make some.
http://i731.photobucket.com/albums/ww312/08sut/IMG_3257_zps963a9403.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3257_zps963a9403.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3255_zpsbdcd982b.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3255_zpsbdcd982b.jpg.html)

http://i731.photobucket.com/albums/ww312/08sut/IMG_3256_zps11a4ce0a.jpg (http://s731.photobucket.com/user/08sut/media/IMG_3256_zps11a4ce0a.jpg.html)

I will finnish up tomorrow with the rest of the install. Hopefully i can get a quick test flight in. After I use a battery on just having the rear arms on, I will fit the front 2 and do the same.

BigEast
23rd September 2013, 09:45 AM
These look great. Anybody try them out? How does the disco fly differently? And what spacers are you using?

paintcast
23rd September 2013, 10:29 AM
Looks sweet :) I will have them tomorrow on my Disco :D

paintcast
27th September 2013, 12:51 PM
Very neat arm :)
32895

resub
27th September 2013, 01:08 PM
What is the reason that those arms are longer (out of curiosity)?

ssb2005
27th September 2013, 03:39 PM
Wow they look amazing!

HobbyLife
27th September 2013, 05:27 PM
Those are sweet.. spacers look fine... Why hate on a spacer when the original arm is plastic? Looks like the spacer would aid in vibration dampening like a dirty frame!

Aloha
Alex

bruce356
28th September 2013, 01:29 AM
Hi Eric'sFPV, have you done any testing yet with the longer aluminium rear arms fitted, differences in performance if any and in particular balance and the problems with quick yaw on the disco, is it solved with the longer arms at the rear.
Thanks and regards - bruce

paintcast
29th September 2013, 12:55 PM
Motor holes are too tight for common screws, so I used screws that came with motors. They got in ok, but they are a bit short. As result one motor flew away due to soft screws:( And also I was stupid enough to forget apply some thread lock on it.

Lesson learned :-/

32987

MAYMIDROIX
30th September 2013, 03:10 PM
AIMDROIX Black Arms are back in stock. ;)
http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=76_155&products_id=1800

MAYMIDROIX
30th September 2013, 03:17 PM
Longer arms will give you more flight stability as the thrust force of the motors will be farther away from each other.

bruce356
30th September 2013, 07:40 PM
Hi Paincast, perhaps it is a good thing that the original motor screws meant for the DJI arms did not fit in your case as these would have been too long and may have penetrated your motor windings damaging them irreparably.

The counter sunk screws that come with the motors are meant to be used with the motor cross arms, although being 3mm dia they are not the correct screws to use either, they are soft and only capture 2 threads when fitted (as you found out).

Buy some good quality 3mm socket head screws 6mm long and they should do the job nicely, put a small drop of low strength Loctite 222 on two of the diagonally opposite screws and your all done (but do fit all 4 screws to the motors). You only need Loctite on two screws as they are enough to hold the motors and it makes it easier in the future to remove them.

Regards - bruce


Motor holes are too tight for common screws, so I used screws that came with motors. They got in ok, but they are a bit short. As result one motor flew away due to soft screws:( And also I was stupid enough to forget apply some thread lock on it.

Lesson learned :-/

32987

MAYMIDROIX
17th October 2013, 08:37 AM
Hi,

Here is the TBS Disco with the aluminum arms and the new landing legs that I designed for the arms. :D The legs are made out aluminum and are designed to be very strong and light. The weight only 7 grams per leg.

http://i889.photobucket.com/albums/ac100/Calys0nga/AIMDROIX/1381252_10151639027646615_1382680832_n.jpg (http://s889.photobucket.com/user/Calys0nga/media/AIMDROIX/1381252_10151639027646615_1382680832_n.jpg.html)

http://i889.photobucket.com/albums/ac100/Calys0nga/IMG-20131005-WA0004.jpg (http://s889.photobucket.com/user/Calys0nga/media/IMG-20131005-WA0004.jpg.html)

CaptainJustice
15th January 2014, 11:38 AM
Does anyone have a vibration report on using the aluminum arms on the discovery?
What other extended arms are available? I have a dji f450 and want to move to a discovery pro with the ability to use longer props.

Trappy
15th January 2014, 02:57 PM
Hans, Maymdroix is actually an exclusive manufacturer for RMRC, who is a site sponsor. He's good to post in here in my opinion.

Las3r
15th January 2014, 07:49 PM
I do not like the boom design, looks to simple!

majkl
9th February 2014, 07:30 AM
So can anyone confirm that these are better or worse vibrations wise? My APM on F550 is suffering from horrible vibrations with the 3D printed vibrations mount for apm + perfectly balanced E-props (dubro balancer).
The vibration mount I tested with black, yellow and red rubber spacers - the same found on the discovery's gimbal.

rwijnhov
9th February 2014, 11:50 AM
Subbed

squishy
9th February 2014, 11:57 AM
I do not like the boom design, looks to simple!

HAHAHAHAHAHAHAHAHAHAAH

thanks for that, I haven't laughed yet today...

KIR
24th February 2014, 01:59 PM
what the maximum diameter propellers with those legs?

mxee
27th February 2014, 02:48 PM
Looks cool, but if/when i crash i would rather have the arms break that the body housing all the electronics.

WinterDevil
1st March 2014, 05:04 PM
Hi guys

I'm looking for an advice, my current setup is about 2.2Kg and I'll be getting my AimDroix extended arms this week, I'm looking for a good combo motor/prop (max 12") for my TBS Disco with new motors and arms about 2.5kg

Thank you!

CaptainJustice
1st March 2014, 07:46 PM
Hi guys

I'm looking for an advice, my current setup is about 2.2Kg and I'll be getting my AimDroix extended arms this week, I'm looking for a good combo motor/prop (max 12") for my TBS Disco with new motors and arms about 2.5kg

Thank you!
I just retrofitted my DJI F450 with the extended version of the arms, SunnySky 3508-16 700kv motors and will be experimenting with a variety of 10-12 inch props. My initial test with those motors on the stock F450 arms and 11x4.7 props was just unreal power. I think if you run your rig and those motors thru ecalc you will see a match at that AUW and more. I have not yet flown the final version so don't know about flight time or how it will handle with the greater weight.

Frankly I share the concern about the rigid arm now eliminating the design break point. Gotta be more conservation and triple-check everything.

Travis Harris
10th March 2014, 03:20 PM
Guys.. I bought the arms for my DP.. and they are horrible.. H O R R I B L E. Yes, they look sexy, yes it makes the copter more ridged and appear nicer, yes the spacers work fine on the Pro..

but…

MASSIVE vibrations compared to the stock DJI arms!. In fact, the vibration was so bad.. that I could barley see from my FPV camera.. and I had a smooth copter before this crap upgrade happened. So, much for jumping in and getting something new thinking it is better.

I am now going to have to replace the black arms again with the stock DJI's as they gave me jello free video (most of the time LOL). The alum, was 10X worse!

CaptainJustice
10th March 2014, 05:30 PM
Guys.. I bought the arms for my DP.. and they are horrible.. H O R R I B L E. Yes, they look sexy, yes it makes the copter more ridged and appear nicer, yes the spacers work fine on the Pro..

but…

MASSIVE vibrations compared to the stock DJI arms!. In fact, the vibration was so bad.. that I could barley see from my FPV camera.. and I had a smooth copter before this crap upgrade happened. So, much for jumping in and getting something new thinking it is better.

I am now going to have to replace the black arms again with the stock DJI's as they gave me jello free video (most of the time LOL). The alum, was 10X worse!
I too am wrestling with vibration but have been unable to determine for certain that it is due to the arms. I am having a vibration that works up into a full oscillation. Makes it unflyable. Playing with dialing down the gains and balancing the motor -- although it and the props have been balanced. I've added bigger motors and longer props -- which was the point of the longer arms -- so I have a lot of variables to work through firs.t

WinterDevil
10th March 2014, 05:49 PM
Oh cmon! I just got my AimDroix and was wondering if I put my CRIUS V2 (MegaPirate) or keep my Naza on my TBS Disco.

I think Naza can calculate better than CRIUS for oscillations. :( I wanted to try a new frame with my Naza.

http://i.imgur.com/kOKEgMV.jpg?1

Travis Harris
10th March 2014, 06:16 PM
I too am wrestling with vibration but have been unable to determine for certain that it is due to the arms. I am having a vibration that works up into a full oscillation. Makes it unflyable. Playing with dialing down the gains and balancing the motor -- although it and the props have been balanced. I've added bigger motors and longer props -- which was the point of the longer arms -- so I have a lot of variables to work through firs.t

Yeah, forget about the Alum arms. They are not for the Discovery Pro. Trust me, trust me, trust me.. the FPV camera had so much vibration I could not fly it. HORRIBLE!

Travis Harris
10th March 2014, 06:50 PM
There is one thing I noticed on mine.. (noticed just now).. that the copter is not sitting completely level. It's off by a few mm. (i.e. three of the four legs are firm on the ground, and then it rocks back and forth a few mm). This is caused by the PLASTIC spacers I received from RMRC for the bottom of the root end of the legs. I just now noticed that they also sell ALUMINUM spacers, and I feel that the issue is that the plastic is compressing differently on different arms.. thus, making the arms slightly different heights.

If I completely unscrew all bottom screws, the copter sits perfectly level. So this must be it.

I ordered the spacers for fun, and will see if it makes a difference. It's possible that one leg being a few mm off, could cause some nasty vibrations (I am guessing).. but, who knows.

If a $1.75 in new spacers will save me from having to re-install the stock arms I will try that first. But, my gut feeling says that the stock arms are going to be better with the vibrations even so..

<sigh>

Travis Harris
12th March 2014, 12:56 PM
Hummm..

Well, RMRC just sent me the ALUMINUM spacers for the AIMDROIX arms (I had the stupid plastic ones on before).. and now, finally the arms actually fit so they all sit flush at the *exact* same height, and there is no rocking back on forth now.

I have to wonder if this was the cause of the nasty vibrations, and possibly the arms are okay after all.

Tomorrow I will test fly and see. LOL.

I will report back,

lacion
12th March 2014, 01:12 PM
they really need to use the same height so we don't have to use any kind of stupid spacers.

Travis Harris
12th March 2014, 01:16 PM
they really need to use the same height so we don't have to use any kind of stupid spacers.

I agree.. LOL.. I was like.. oh, come on guys.. whats the deal with that! Anyway, I can say for sure that at least with the aluminum spacer it is totally solid now.. and this may make a difference in flight. I am charging packs now to test it out...

Travis Harris
12th March 2014, 05:17 PM
I am afraid that there is still bad vibraitons on the frame, enough to really mess up the FPV camera. The actual footage is not too bad, but not as solid as what it was with the stock arms.

SO...

Back to stock arms I go, and thats that!

I now have four brand new AIMDROIX arms for sale, + BRAND NEW T-MOTOR 900kv's, and 30A SimonK ESC's all for sale. All mounted, and soldered to fit a Discovery, or F450.

PM if interested.

lacion
12th March 2014, 05:19 PM
I am afraid that there is still bad vibraitons on the frame, enough to really mess up the FPV camera. The actual footage is not too bad, but not as solid as what it was with the stock arms.

SO...

Back to stock arms I go, and thats that!

I now have four brand new AIMDROIX arms for sale, + BRAND NEW T-MOTOR 900kv's, and 30A SimonK ESC's all for sale. All mounted, and soldered to fit a Discovery, or F450.

PM if interested.

motors? what will you be flying with?

Travis Harris
12th March 2014, 05:38 PM
motors? what will you be flying with?

Yeah, I have another set here already from another Disco that I am going to use. I sold off other parts form it to a friend already.. so, I am trying to recycle all the parts I have. I could start my own FPV company I have so much inventory. LOL.

lacion
12th March 2014, 05:52 PM
Yeah, I have another set here already from another Disco that I am going to use. I sold off other parts form it to a friend already.. so, I am trying to recycle all the parts I have. I could start my own FPV company I have so much inventory. LOL.

i sold all my extras and left overs, that's how i got my pro. its incredible the amount of crap we can accumulate o_O

zozolione
17th June 2014, 09:33 AM
Hi Guys

I've ordered the arms last year from RMRC and bought also a second Disco Top and Bottom Plate made a double whopper as X8 config 2212 800kv 4S 2x5000mAh 10x5 Xoar Props.

It fly’s great but the flight time is not optimum have to reduce weight cause installed the H3-2D on it and two FPV Cams one with Pan/Tilt function.

Upgrading now the whole thing to the final edition H3-3D and testing now also following motors and props:

X4 3508 700kv 4S 13x5.5 Carbon floating props
X8 2216 800kv 4S 11x5 Graupner E-Props may 12x5 too
X8 2212 980kv 4S 10x5 Graupner E-Props

kind of this thing just with redundancy:

https://www.youtube.com/watch?v=ahb2D1AgIq4

MAYMIDROIX
17th June 2014, 08:55 PM
I agree.. LOL.. I was like.. oh, come on guys.. whats the deal with that! Anyway, I can say for sure that at least with the aluminum spacer it is totally solid now.. and this may make a difference in flight. I am charging packs now to test it out...


Sorry that I have been away from the threads because I was focusing on school. Now I'm officially graduated from mechanical engineering.


When the arms were first released, I used a common size material to avoid extra machining that would have increased even more the cost of the arms and still they are very expensive to manufacture in the U.S. That's why they are about 5mm shorter than the stock DJI arms. Also, if they were the same height as the DJI arms, you will be having problems with the battery taps of the tbs disco, so by using the two cylindrical aluminum spacers on the battery tap side and the one piece spacers on the other arms you get an strong joint between the plates and the arms. I'm working on some new ideas but for now I have found that using spacers is the best option.

MAYMIDROIX
17th June 2014, 09:00 PM
Hi Guys

I've ordered the arms last year from RMRC and bought also a second Disco Top and Bottom Plate made a double whopper as X8 config 2212 800kv 4S 2x5000mAh 10x5 Xoar Props.

It fly’s great but the flight time is not optimum have to reduce weight cause installed the H3-2D on it and two FPV Cams one with Pan/Tilt function.

Upgrading now the whole thing to the final edition H3-3D and testing now also following motors and props:

X4 3508 700kv 4S 13x5.5 Carbon floating props
X8 2216 800kv 4S 11x5 Graupner E-Props may 12x5 too
X8 2212 980kv 4S 10x5 Graupner E-Props

kind of this thing just with redundancy:

https://www.youtube.com/watch?v=ahb2D1AgIq4

Can you show us some pictures of what you have?

Xaser
18th June 2014, 02:38 AM
Any reason to buy these over the AerialMob extensions (expect price of course)

majkl
18th June 2014, 02:59 PM
I milled myself a couple of alu arms, and I have to say they turned out nice.
The price of making them in series of hundreds could be much more affordable than the current price.

47744

MAYMIDROIX
18th June 2014, 07:57 PM
Any reason to buy these over the AerialMob extensions (expect price of course)

In my personal opinion the aimdroix arms look much better, you don't need to align the motor mount as this is a one piece arm, aluminum will dissipate heat from the motor so it will run at lower temperatures, they are lighter.....and we were the first to hit the market with a DJI arm alternative. The arms were U.S made with high quality 6061 T6 aluminum and designed by mechanical engineering student (now a mechanical engineer).
Every product has it goods and bad attributes. I really don't like the fact that the boom can twist if the clamps get loose or are not tight enough.

At the end it's all about personal preference and opinion. http://img.tapatalk.com/d/14/06/19/vy3e9yry.jpg

MAYMIDROIX
18th June 2014, 08:00 PM
I milled myself a couple of alu arms, and I have to say they turned out nice.
The price of making them in series of hundreds could be much more affordable than the current price.

47744

They look pretty nice!

deanot
21st June 2014, 06:03 PM
That is correct... to be clear, DON'T USE ALUMINUM ARMS IF YOU CARE ABOUT VIBRATION DAMPING.

Sure they look cool, and as stated they will give more yaw authority (but so will longer plastic or wood arms). At the expense of decreased vibration damping.

Plus, aluminum is not forgiving, it will not take a hit like the plastic ones. They will twist and eventually break, aluminum as we all know if quite brittle.

kclamer
23rd June 2014, 04:10 PM
I read through the specs on these arms and the manufacturer claims that you can use up to 14" props with these. I currently use 10x5 props with 750kV motors and a 4S 4500mAh battery. Would it make sense for me to go with bigger props with these aluminium arms? Would that increase the flight time without changing the motors or the battery?

kclamer
1st July 2014, 01:01 AM
OK so I went and did some homework. Found out that with the TBS 750kV motor the 10x5 prop is pretty much as good as it gets. Now what do you guys think of the MT3506 motor with 12x4 props? Running this through ecalc with a 5000mAh battery I get over 20min hover time. Has anyone had a chance to experiment with this combination? If so what kind of results have you gotten?

Xaser
2nd July 2014, 11:24 AM
wait, you got the best hover time with the TBS 750kv? that seems odd..

kclamer
2nd July 2014, 11:32 AM
wait, you got the best hover time with the TBS 750kv? that seems odd..

No what I meant was that the 10x5 prop will give you the best hover time with a TBS 750kV motor not that this is the ultimate combination of a motor and prop. If you use a larger prop on this motor it will just choke.

Xaser
2nd July 2014, 01:19 PM
oh right, sorry about that, missread your post a bit :P can't comment on the mt motor though, their stats look promising.

kclamer
5th July 2014, 03:00 AM
Finally installed the arms and put all the electronics onto vibration isolation foam. The quad flies like it has never before, very responsive, very tight but vibrates like a mother effer. The props and the motors are balanced to the best of my abilities but the video feed from the fpv system is mediocre at best, terrible at worst. I have tried four different ways to mount the video transmitter and the camera so as to isolate them from the vibration but nothing has worked. Does anyone have any suggestions on how to decouple the two components from the frame or have a suggestion on the right density of foam that needs to be used? Any help is appreciated.

DiscoTuna
5th July 2014, 03:38 AM
I used a cut up piece of Loveseat from TBS for my isolation and it it works well. It sits in between the Tx mount (also from TBS) and the Tx - Ihave the foam in an L shape and it sits in between.

Extra vibrations has always been my fear of these more rigid arms.....

kclamer
5th July 2014, 12:56 PM
The love seat ha, ok thats good info. Did you also zip tie it to the mount? What about the camera, should it be soldered or left loose. There are three pads that allow the camera bracket to be soldered to the frame.

kclamer
6th July 2014, 02:13 AM
Day three with trying to isolate the camera and vtx from vibration and for the most part the setup is usable but there is one big problem I have found. With these aluminium arms you have to use longer screws on the bottom because you have to use spacers. Well the screws that come with the arms don’t center the plate like the TBS original ones do and so if pressure is put on the arms they will actually slide on the bottom plate throwing the whole thing out of whack. I found this out when my quad would wobble on a flat floor, then after straightening it out and flying it would get tweaked again and start being jittery while flying. I tried tightening the screws as much as I could but didn't want to strip the top. I will try to find longer screws that are like the ones that TBS uses and see what happens. I have also ordered some zeal vibration absorption gel to try and get rid of the jello effect I am seeing in my fpv cam when flying. My advise to someone wanting to extend their arms on the discovery is to use the ones from TBS, these aluminum ones are not worth the vibration.

ZACATTACK
17th July 2014, 05:02 PM
A member in here already tried these arms on the Pro and could not isolate the vibrations coming from the aluminum. Short and Tall of it, these arms are not very good for the TBS Disco, the Aerial Mob arms that were designed for the frame is the way to go for a arm extension upgrade . There is a reason Trappy did not implement these arms into the Long Range upgrade for the TBS Pro Frame and you can see the problems written in the above post. ^^^ The A Mob arms are basically the same price and can accommodate up to 15" props, I think the writing is on the wall.

MAYMIDROIX
1st October 2014, 11:52 PM
If you are still having vibration the arms are not the source of the problem. Many users have used the arms with the TBS disco with very good results.

paintcast
2nd October 2014, 04:03 AM
If you are still having vibration the arms are not the source of the problem. Many users have used the arms with the TBS disco with very good results.

Confirmed ;)

MAYMIDROIX
3rd October 2014, 12:50 AM
https://www.youtube.com/watch?v=U0Wkwsxr4bs&list=UUOmc3Rpq-gbo47CWB5HNu0g

I can't notice any vibrations in this video!:cool:

www.aimdroix.com

ZACATTACK
3rd October 2014, 01:05 AM
If you are still having vibration the arms are not the source of the problem. Many users have used the arms with the TBS disco with very good results.

Send me a Set and I'll try them out? How's that? Your the manufacture correct? Why would you agree to such allegations? Like shooting yourself in the foot, correct?

MAYMIDROIX
3rd October 2014, 01:15 AM
Send me a Set and I'll try them out? How's that? Your the manufacture correct? Why would you agree to such allegations? Like shooting yourself in the foot, correct?
Right, but the videos speak by itself. Just search for aimdroix in youtube.

roostnureye
25th June 2015, 10:59 AM
I have a disco with aimdrox arms with the one piece aluminum spacers and love the way it made my disco fly! I have an anti vibe plate under a Sony as100v and I get zero jello.

MAYMIDROIX
25th June 2015, 11:01 AM
Awesome! Can you post some pictures?

roostnureye
28th June 2015, 02:34 PM
I posted them on your Facebook page. You are welcome to repost them here

MAYMIDROIX
28th October 2015, 04:12 PM
I have a disco with aimdrox arms with the one piece aluminum spacers and love the way it made my disco fly! I have an anti vibe plate under a Sony as100v and I get zero jello.
The winner of a Blackbird 250 carbon.

I have a disco with aimdrox arms with the one piece aluminum spacers and love the way it made my disco fly! I have an anti vibe plate under a Sony as100v and I get zero jello.
The winner of a Blackbird 250 carbon. http://www.aimdroix.com/store/index.php?route=product/category&path=64_75