Jun,

We have geared our single stack unit, and intend on making a gear box for it too. Right from the top of my head I remember 1:4 reduction ( Kenway gears ), 10.5V, GWS 8*5HD, 1amp, 90gms thrust. Is this what you'd be looking for?

-Uttam

Jun, I was probably hasty on my last post, I'll need to check on those figures again. I have written down 50gms at 700ma, 7.4V, but I havent written down figures for 3 cells. I'll check and let you know.

-Uttam

Uttam,

I am looking for a minimum of 4oz thrust at 1.5A using 3-cell 250mah LiPoly packs, preferably on a GWS or Wes 8x4.3 prop. Whole drive (plain outrunner or geared) should be 15 grams or less.


Jun Nolasco

Is there a 14g or less brushless motor out there that will put out over 4oz of thrust at 1.5A using 3 cells? The RS-LRK 195.03 looks close. Unfortunately, it looks like the prop would be too small.

Jun,
Unfortuntately I don't think there is an outrunner available yet that can drive a 8x4.3 prop DD and that weighs less than 14g. You will have to either go up in size on the motor, or down in prop size to something like a 7x4. Or, you will need to gear it.

Gordon

Actually, I do use a WES 8x4 prop on the 11 gram Strecker motor on a 3s Irate 300 pack in my "Shockwave" design. As usual the performance data of the Strecker motors are very conservative. On a typical 3D aircraft where full power is only used in short period bursts and the motor sits out in the prop wash you can almost double the maximum power rating. The great thing about these motors is the very broad power range and efficiency.

Bert,
Thanks for clarrifying that. So, Jun, the 11g RS-LRK motors should be available soon from Dave Lewis and should meet your needs if you don't run them at that level for sustained periods.

Gordon

I have resurected my Quick Citabria. When it last flew it had one of the early RFFS conversions to 2-cell opertion by Matt Keennon. It used two LiPolys and a M20-MV at 6.7:1 and a 5x3 3-bladed CF prop. Unfortunately a radio glitch sent it into a wall at considerable height and it fell to the floor in pieces.

I've put it back together with a new wing pylon, a longer tail moment, and most importantly equipment to use it as a test bed for micro BL outrunners. It has the new JMP servo RX that uses a separate ESC, a BSD lightened CC Phoenix 10 BL controller, and two Falcon servos. Batteries are either a 145x2 or 170x2 LiPoly pack, depending on the motor used. I machine a wooden adapter for each motor that presses snugly on the CF tube fuselage. This allows swapping motors at the flying site. And, since all the equipment is out in the open it's also easy to swap, say, BL controller from a 2-cell unit to a 1-cell unit like the Heino Young YGE4 BL.

Tomorrow night I'll fly it with the Gary Jones Mini Disc BL from Bob Selman, and also with Uttam's 2-cell Micro Midget motor. Should be fun.

Gordon

Closeups of the MiniDisc BL and the MicroMidget and their press fit quick change mounts.

Gordon,

Looking great! Looks like you are using the 5*3 prop and our single cell wind?

Good luck with both setups!
-Uttam

Uttam,
Nope. Tha't your 2-cell wind with a 4x2.5 prop. Next month I'll try the Heino Young 1-cell controller and your 1-cell motor.

Gordon

It looks like it's time to give David another email! Thanks folks.

Jun Nolasco

Well the Quick Citabria flew great. How could it not fly great with so much thrust relative to its weight. With the MiniDisc motor the all up weight is 43.5g, about the same with the Mightly Midget as I added clay to the nose to balance with that lighter motor. With either motor the plane has abundant power and flys at about 40% throttle. Stall turns are easy, and there is lots of power on tap to get out of trouble. All in all it shows how much fun planes based around these motors will be.

Gordon

Congrats Gordon! You have no idea how happy that makes us feal

Happy landings,
Uttam

thanks for the results and fotos Gordon. Very happy to hear

alright is there any way we could end up with a 3d set up with one of these little beuties??? anyone tried?