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Feb 19, 2006, 01:41 PM
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ptglass's Avatar
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Balsa Products Large brushless motors

Has anyone had any experience with the new large BP brushless motors that are being sold on their website? They are really priced great.
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Feb 19, 2006, 03:41 PM
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Feb 19, 2006, 03:51 PM
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300 watt and 400 watt motors

I believe these are the same motors that RVM Shop on e-bay is selling. They appear to look the same. I purchased two, the 300 and 400 watt models from RVM. Both had poorly pressed magnet bells to the bell housing. The 400 watt model simply fell off. I added 540 Loctite and pressed them together. There were some wire clippings in the smaller one which I brushed out. After checking the magnet bell gap while rotating by hand, I applied power and both work well. I was really surprised! I relayed the info to RVM and they said they would forward it to the factory. They will spin a good size prop with ease and run cool. The quality is good in regard to parts, but the workmanship has much to be desired. I don't know if these are the same motor but it sure appears to be.
Overall I am happy with mine, It's a good deal if you don't mind taking the time
inspecting, and possibly doing some minor work. I'm pleased with mine.

Feb 19, 2006, 08:15 PM
It's a Great Day to Fly
LenBFP's Avatar
I have the new one, the 2908 in a Formosa II swinging an APCE 11x5.5 fed by an Apex 2200 12C 3S. I am a happy camper. It only needs full throttle to go straight up. Comes down warm, but not too warm ( outside temp was 55 degrees F that day) and the battery is warm but not too warm. I tried a 10x7 and 10x5 neither of which could do the job. It was faster with the 10x7 than the 10x5, but the static thrust was about the same due to rpm loss. It is a bit loud though, it almost sounds like a muffled slimer up there. I got mine on ebay a few weeks ago.

Last edited by LenBFP; Feb 19, 2006 at 09:00 PM.
Feb 19, 2006, 08:27 PM
Quite a few dealers are selling these large TowerPro motors. I read somewhere, here I think, that these are copies of the new large E-Flite motors. I'm trying to decide which would be good for converting a .25 size gassy to electric.
Feb 19, 2006, 08:32 PM
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I bought a few of the 2915-5 and 3520-7 motors and have been happy with them. I did a review of the 2915-5 here a few months ago. Here is a link to that thread.

2915-5 Motor Review

One of mine also had a loose end bell. I pressed it back on, and it has been fine ever since. I am using one in my 4 pound 166% F/A-18 ParkJet and it performs very well. I am running an APC 11x8.5E prop with a 4-cell 3100mah Li-Po battery. I am getting right at 8,000 RPM and pulling 29 amps of current. If you want to see one in action, you can check out my build thread at the following link.

LBMiller5's F-18XL Build Thread

There are 3 flight videos at post #324 in that thread.

If anyone is interested in trying one, I picked up a few extra motors to re-sell, and I have them available for $44.00 delivered to your door. ($39.95 + $4.05 for Priority Mail Shipping)

If anyone is interested you can send me a PM, and I can give you the details.

I actually just got back from the flying field a few minutes ago. I took out the big F-18 and put a couple flights on it. I met up with Naval AV8R today, and we went out together. He brought his 100% F-18 along and put a couple flights on it.

See you later!

Feb 20, 2006, 04:43 PM
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ptglass's Avatar
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Thanks for the feedback!
Feb 25, 2006, 08:40 AM
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Originally Posted by ptglass
Has anyone had any experience with the new large BP brushless motors that are being sold on their website? They are really priced great.
Purchased the BP 2915-5 for a Telemaster Electro based on the requirements by Hobby Lobby. Have about 8 18-20 minutes flights so far.

I went ahead and bought the discount combo esc, so the total including shipping was less that $90. The "other price" was over $200. The motor runs absolutely great with 3 cell lipo 4000mah. Should get over 30 minutes of flight time (based on the remaining battery levels)!!!

The only catch, you have to make your own motor mount. Quality seems to be fine. My guess the e-bay stuff may be "blems"
Feb 25, 2006, 10:03 AM
Thanks, how about some details? How much does your Telemaster weigh Prop, amp draw, watts, you know the drill I'm hoping to get one of these or one of the other large BP/TowerPro motors to convert a .25 size gasser Thanks again
Feb 25, 2006, 10:26 AM
Registered User

Oh Yes, the details.......

The Telemaster Electro ARF weight is 4.75 without batteries. The LiPo 3 cell battery pack (4000mah) is 9oz. The motor rating is 400w and the esc rating is 40A. So far have had 2 different props on the front end. One is a "student prop" that supposedly is unbreakable and is a 11X5.5 electric thin. It really flexs alot, wasn't impressed. The current prop is a 12x8 and draws 30 amps. This pulls the Telemaster very, very well, but to fast, most students like it slooow.
Going to try a 11X6 this next week and see how it goes. My gut is, this will be a good choice between power, speed and run time.

Here's the Telemaster link
Last edited by agshane; Feb 25, 2006 at 10:33 AM.

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