New: Multiplex Acro Master - Page 321 - RC Groups
Thread Tools
Jan 07, 2012, 11:51 AM
TAS Foamies was here!!!!!!!!
Originally Posted by Waverunner
Nice looking plane. Do to weak eyes, I like my stuff a bit brighter.
Ya thanks, i broke my neck and so my friend did a free scheme for it and it's an eye catcher when you go the field
Sign up now
to remove ads between posts
Jan 07, 2012, 02:05 PM
Registered User
a_semchenko's Avatar
This is what I did to kill "mad cow Moo" and vibration for 3542-D:
1-fill all nose slits with CA
2-remove stock motor plate and make new motor plate, use 4-mm plywood; for adjustment screws make 2,5 mm holes and cut thread using that screws
3-threaded each of 4 adjustment screws +1 turn more then recommended by MPX. They all mast contact whith they own reference areas on 2 beams. May be it is necessary for silence.
4-remove excessive elapor with dremel, install motor and motor plate
That's all. There is no more "moo".

Jan 13, 2012, 03:58 AM
Registered User
a_semchenko's Avatar
New year flights - no "moo", no vibration.
Prop APC 12x6 (I think it's better) and 13x4 (more thrust, much less speed, doesn't like wind).
MPX Acromaster.mpg (1 min 55 sec)

It was heavy snow that day, so skis was necessary.

Jan 13, 2012, 09:15 AM
ottootts's Avatar
Jan 16, 2012, 12:24 AM
Puffed Up Lipo
kimeza's Avatar
Thank you Alex. Pictures please?
Jan 21, 2012, 01:37 AM
TAS Foamies was here!!!!!!!!
Pnp acromaster for sale on the garage sale Classifides section ....has a great scheme
Last edited by ThatGuy123; Feb 28, 2012 at 07:38 PM.
Jan 21, 2012, 06:00 PM
Takeoff=Option Landing=Must
robusp's Avatar
Originally Posted by a_semchenko
New year flights - no "moo", no vibration.
Prop APC 12x6 (I think it's better) and 13x4 (more thrust, much less speed, doesn't like wind).
It was heavy snow that day, so skis was necessary.

I just flew mine today for the first time on skis.
What a blast. I thought about taking wings off of it and just drive it.

Feb 19, 2012, 01:43 PM
Registered User
Well, I started playing around with motors to see if I could come up with an economy setup that works well. This is my latest that I'm pretty impressed with It's $12 from HK, and appears to be really well made. I wish the bearings were a little bigger, but mine are in good condition, and easily replaced when it's time.

And it pairs well with my standard cheap but good $20 esc , set the timing to the highest setting.

Ya have to get a little creative mounting it, but it easily handles 400w with a 14x8 on 3s, or insane with a 12x6 on 4s - pretty impressive for a 108g motor.

Just thought I would pass it along for anyone looking to save a few dollars.

Hope this helps.

Feb 23, 2012, 01:43 PM
Registered User
....and one other thing I should mention is that using the above esc gives one the option of running the servos at 6v. I am doing that, using 65mg's around, and I think this obviates the need for the bigger servos on the ailerons. I have had no problems whatsoever.

Hope there are still some active AM fliers out there.

Feb 24, 2012, 04:06 AM
Registered User
Hey Steve, sorry no-one responded to your previous post - I think we're all mostly still enjoying the AM and keen to hear news. I checked the motor out and it does look impressive - it will be interesting to hear how it performs over time. I've used smaller versions of that design on indoor shockies for a long time - apart from the shaft being excessively long (which has never caused me a problem from crashes), they are robustly if agriculturally made.
The AM could carry the few extra grams (if there were any) better than a shocky. I might say that the 14" prop sounds larger than most are using - I'm a 12x6 man myself - although I relaise the kv/LiPo combination forces that on you. Maybe a three blader would work? Good luck with experimenting and you will have fun .

My question is "what's next?". My AM is bent out of shape and needs retiring. Is there something that has similar robustness but improves on the flying precision of the AM? Or is that mainly caused by my banana fuselage? Has any one moved on successfully and happily?
Last edited by Daddymonkey; Feb 24, 2012 at 07:02 AM.
Mar 05, 2012, 01:12 PM
Registered User
nEvert's Avatar
Hi All,

Thanks for all the info on this great thread. My AM is about to retire. Had a mad cow in-air nose explosion last year (beautiful), and glassed it on the outside as I found all the pieces. So its a bit over weight nowadays. I'm thinking of putting some CF-cloth + Gorrilla/Rhino Glue inside the nose of the new one. Any thoughts on that?

Happy Landings,


Modellflygning på isen 25 feb. (2 min 45 sec)
Mar 07, 2012, 08:42 AM
ottootts's Avatar
Originally Posted by nEvert
...I'm thinking of putting some CF-cloth + Gorrilla/Rhino Glue inside the nose of the new one. Any thoughts on that?
Hi Hans,

I'm going to build one myself soon and I just wonder if all this nose reinforcing is really necessary. My experience with Multiplex is that their planes are plenty strong enough for normal use.

My own theory is that either the reinforcing group are putting overpowered motors in or that they are forgetting to balance the prop. Especially an out of balance prop would cause terrible vibration.

Would any of the reinforcing group care to point to a case of vibration when using a balanced prop and the motor which Multiplex recommends (the Himax C 3516-1130 - a 350 watt motor)?

Happy landings,

Mar 07, 2012, 04:52 PM
Flyin brick
bobber's Avatar
Otto, have a look at the nose area of your AM and decide for yourself if it's strong enough for a 350w.
I did reinforced the nose of mine and I DO balance my props thoroughly but I realise that for the prop to be really balanced you need to perform dynamic balancing. Anyone's got such equipment?
Mar 07, 2012, 05:22 PM
Registered User
If you decide on an AM you'd be better off doing some sort of reenforcement now instead of later when the fuse is glued together. Some have had good use without any reenforcement, however many need it. I also believe much of the problems people have are with overpowered AMs. A simple mod would be to glass the inside of the nose with lite cloth and ca and use rubbers washers between the motor and mount. I did that along with cf rod(from motor mount to wing root). Probably overkill but it's holding well with an Eflite power 15 3s 2200 battery and 13x6.5 apc. If you plan on building an "low and slow" AM you will not need a lot of power and your nose mod will be very simple. Also the AM appears to like a bigger prop than the 11 inch that Multiplex recommends. Nick
Mar 08, 2012, 01:40 AM
ottootts's Avatar
OK. As I've never used glass fiber & CA before, could anyone please point me to an explanation - for newbies - of how to go about glassing the AM nose?

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Extremeflight Extra vs Multiplex Acro Master Magna 3D Flying 17 Dec 10, 2008 02:11 AM
For Sale Multiplex Acro Master RTF slopenutz Aircraft - Electric - Airplanes (FS/W) 6 Jul 13, 2007 05:12 PM
Sold Multiplex Acro Master termite Aircraft - Electric - Airplanes (FS/W) 8 Mar 20, 2007 06:04 PM
Link Multiplex Acro Master $99.99 Doubletap Hot Online Deals 6 Dec 18, 2006 04:37 PM
New Multiplex 4 Engine Cargo with speed control !!!! Looks like a B-17 Joe Pierson Aircraft - Electric - Airplanes (FS/W) 0 Sep 06, 2001 02:48 AM