Another foam glider conversion

[Jamie D]

While in Charleston South Carolina, I saw this glider at Toys R Us. While completing the build I burned out the brushed motor and am looking for advice as to what size brushless and ESC to put in it.

- 35" Wingspan
- 15 oz total flying weight (as seen, including the currently installed motor and battery)
- Battery = 3 cell, 1000mAh, 10c lipo.
- Gyro stabilized ailerons

Comments?

[retiredVTT]

Humm...something putting out 120 watts on a 11vt 3S pack would require a current of 13 amps..suggesting an esc of at least 20 amps.

A motor kv in the 1000 range would allow a prop of either 9/6 or 10/5 to produce required thrust.

So, your looking for a brushless motor of 1000 to 1100 KV that has a max current draw around 15 amps.

Next stop...HobbyKing website.

Later Edit....what would help to know is the weight of the original brushed motor...because if we do not try to match that weight with the new motor the balance (CG) will be messed up. Also the above figure of 13 amps would be taxing a 10C battery pack. Most of todays packs are at least 20C. (..meaning a 1000mah pack can provide up to 20 amps for a short 10 sec duration..such as takeoff)

In this link to HK http://www.hobbyking.com/hobbyking/stor ... tegory=519 you will find a herd of small motors. Pick a motor of similar weight, that has a KV of around 1000 and a power rating of around 130 to 170 watts, and then use a 20 or 25 amp esc and a 9 to 10 inch prop.

If by chance the original motor weighed as much as 3 ounces....you would need to be looking at larger brushless motors....however I'm assuming that motor was around 2 ounces.

I'm also assuming you don't want rocket performance from this model....if you did (later on) you would be looking for a higher KV motor which would swing a smaller 6 inch prop with a much higher current, requiring a bigger battery.


Bill

[yorcram]

That is about the same size and wirght as my old Alfa models. I used 12amp motor, 18A esc and 1600mah battery. It had enough power for large loops. I think 10-12 amp range with 18 a esc will be more than enough.

Marc

[retiredVTT]

Here is a system that could work for you.

http://www.rcplanebuilder.com/index.php ... cts_id=107

This company is a small startup that is busting to satisfy it's customers. Nothing but great comments on the threads and he actually lists what his shipping charges are to Canada.


Bill

[MarkL]

They are great to deal with, bought my popwing kit from them a few weeks ago and they refunded me $10 after the fact because shipping was cheaper than listed that I paid on the website. Quick to reply to emails as well.

[Jamie D]

Thanks for the advice guys. I think I will try them out at RC Plane Builder. I would expect a much shorter wait time as well. You're right that I will have to watch the CG adding a brushless. Maybe some extra weight in the cockpit to make up the difference. I'll be using the dsm2 xmitter that came with my Blade MCX2 bound to an OrangeRX. What can you guys tell me about their range as I would expect this plane to be a little quick for
a beginner such as I.

[Jamie D]

I placed the order recommended by Bill on 9 Apr, paid $7 shipping of which they refunded $2.30. It arrived this past Wednesday 18 Apr. Not bad... 6-7 business days.

[retiredVTT]

Excellent service....hope it all works out for you..!

Keep us posted..!

Bill