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Precision Aerobatics Ultimate AMR - motor recomendations

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Precision Aerobatics Ultimate AMR - motor recomendations

Old 05-02-2011, 10:07 AM
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JetPlaneFlyer
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Default Precision Aerobatics Ultimate AMR - motor recomendations

I've just ordered a Precision Aerobatics Ultimate AMR. I'm now looking for a motor to power it. PA recommend their own Thrust 40 motor but I'm not sure if i can get one in the UK

The motor spec is: 500W, 850kv, 140g (full spec here: http://www.precisionaerobatics.com/p...ls.php?pid=418 ) . I want something that will swing the 14x7 prop that the Ultimate is designed for....
Do you have any recommendations of motors that will do the job?

Thanks
Steve
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Old 05-02-2011, 05:26 PM
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Larry3215
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The PA planes are so well built and fly so well, I'd go Hacker or Hyperion.

Here are a couple that are real close to the spec.

The hacker is 5 gm or so heavier and 50kV less at 800. You might want to prop up a hair to get full power but the hacker can easily handle being over propped.

http://www.aero-model.com/Hacker-Brushless-A30-14L.aspx

Hacker also has a 900 kV version but its heavier. Does that model tend to need extra nose weight to balance?


The Hyperion GS3014-16 also looks good. Its a hair lighter than the PA motor and the kV is closer at 857.

http://www.aircraft-world.com/shopexd.asp?id=3725

http://media.hyperion.hk/dn/gs/

Im sure there is a Scorpion motor thats also close, but I dont like the Scorpions because of needing to lube the bearings. I think thats a ridiculous and needless pain with the quality bearings available these days.

For got the links

Oops - dont forget Axi. They tend to be a bit more $$ but quality is top knotch.

http://www.hobby-lobby.com/axi_gold_...32978_prd1.htm
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Old 05-02-2011, 05:38 PM
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kenchiroalpha
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Hi Steve
For a budget motor
http://www.hobbyking.com/hobbyking/s...idproduct=8486
For a quality motor
http://www.aero-model.com/Hacker-Brushless-A30-14L.aspx
Take care dear friend
Yours Hank
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Old 05-02-2011, 05:42 PM
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There not tough as you may think.. Fly GREAT but are easy to break when moving or storing , I love mine,,bubsteve
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Old 05-02-2011, 07:10 PM
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Larry3215
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Originally Posted by stevecooper View Post
There not tough as you may think.. Fly GREAT but are easy to break when moving or storing , I love mine,,bubsteve
Thats the trade-off for the light weight
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Old 05-02-2011, 07:15 PM
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Originally Posted by kenchiroalpha View Post
Hi Steve
For a budget motor
http://www.hobbyking.com/hobbyking/s...idproduct=8486
For a quality motor
http://www.aero-model.com/Hacker-Brushless-A30-14L.aspx
Take care dear friend
Yours Hank
Note that that budget HK motor actually weighs a lot more than the claimed weight - about 2.75 ounces or 78 grams more. About a 50% exaggeration on HK's part. Thats a huge difference on a plane like the PA.

I would also doubt the claimed kV and all the other specs as well.
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Old 05-03-2011, 02:11 AM
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Dang, thats a great price for a Hacker motor, maybe i will start using hacker motors Thanks Larry

http://www.aero-model.com/Hacker-Brushless-A30-14L.aspx


A30-14L V2
Hacker Brushless 500W 800k/V Outrunner The New A30 V2 series motors are designed for Larger Parkflyers, 3D-Aerobatic, Scale models and Helicopters using 2 to 5 series LiPoly batteries.
They now feature a new rotor cooling design with an integral cooling system, as well as better stator effiency design. The A30-10L V2 is designed for 30 to 45 oz. 3D-Aerobatic and Scale models with 2-3 cell LiPoly batteries. This 14 pole, Outrunner design creates MASSIVE TORQUE, therefore larger direct drive props can be used without the need for a gearbox. This motor features Oversize bearings, Curved Neo-magnets, and a High Efficiency stator design. These motors produce more power with lower current consumption than other popular Outrunner designs!
Includes backmount, prop adapter and all screws. 3.5mm gold bullet connectors are provided.





Specifications
  • Peak Watts: 500
  • kV(RPM/V): 800
  • Diameter: 1.46 in
  • Length: 1.81 in
  • Weight: 5.10 oz.
Your Price: $66.99

Qty: 1 2 3 4 5 6 7 8 9 10
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Old 05-03-2011, 03:57 AM
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Originally Posted by Larry3215 View Post
Thats the trade-off for the light weight
The frame'in & diz, work on them's a work of art
ain't broke her,(yet) no way I'll catch her out of a hover like I do my other balsa plane's, I have a 62 dollar flight pack from HK on her and a 12 year old FM 6 ch, TX ,,3/D her on the deck everyday,, you don't have to bust the bank to fly these,, I think Their recommended Outie cost more than my whole flight-pack!, Have FUN!!!!!!!!bubsteve
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Old 05-03-2011, 07:32 AM
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Thanks for the recommendations guys.. some very nice motors.

Talking of cheap skate options... This one seems to have the correct specs, at least on paper:

http://robotbirds.com/catalog/produc...09232426bf786c
http://robotbirds.co.uk/catalog/images/emaxgt.htm
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Old 05-12-2011, 10:48 PM
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Originally Posted by Larry3215 View Post
The PA planes are so well built and fly so well, I'd go Hacker or Hyperion.

Here are a couple that are real close to the spec.

The hacker is 5 gm or so heavier and 50kV less at 800. You might want to prop up a hair to get full power but the hacker can easily handle being over propped.

http://www.aero-model.com/Hacker-Brushless-A30-14L.aspx
Larry,

Decided to take your advice and go with the Hacker A30-14L. It looks like a good match for the Ultimate and will easily spin a 14x7 prop. Ran it through Motocalc and nearly 2:1 thrust/weight ratio so that should be more than enough to get me going

It also looks good value compared to precision Aerobatics' own 'Thrust 40' motor.. At UK retail price the Thrust 40 motor is 50% more expensive than the Hacker, which good though the Thrust motors are, I just cant justify.

The Ultimate kits arrived in the UK last week and are hitting the dealers as I type, so i should have it next week....

Assembly thread to follow (cant call it 'build' because there is no building in it)

Steve
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Old 05-12-2011, 11:35 PM
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Looking forward to seeing how it turns out
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