Will a 600XL work well in a Falcon 56

[mgg1]

I want to convert a Goldberg Falcon 56 from.45 glow power to electric seeing how well the 430L worked on my Goldberg Gentle Lady glider, more power, quiet, no mess, throttle, stop and restart the engine in flight.
I have an Align 1650KV 600XL and an Align 75 amp esc on a Trex 600 that has 25 hours on it that I am considering using.
If it works I will get a 100 amp esc and 1700KV 600XL for the 600.

22.2 volts would turn the motor to fast and draw to much current for the pitch and diameter direct drive prop that I will need to run.
1650 x 22.2 =36630 rpm. I would need a 2.5" pitch prop and have not been able to find one.
The specifications on the motor and ESC say that they both will handle 11.1 3s lipos so I wired up 4 2100 3s TP Prolites in parallel to experiment and the motor ran.
So if I go with 1650 KV x 11.1 volts should yield 18315 rpm x 5 pitch prop = 91575 ÷ by 1056 = 86.71 max possible mph with 0 slip. This is very similar to the .45 at 14500 rpm with a 9.5 X 6.

Do these numbers sound correct and does anyone see why this would not work well using a prop adapter and a 10"x 5" prop and having unlimited vertical climb?

The motors that I have seen for glow conversions are low KV that turn large diameter props at low rpm.
The Falcon does not have room for more than a 10" diameter without extended landing gear so that is why I am considering a 600XL using a 9" to 10" diameter prop.

[mgg1]

I found that an Align 1620kv 600L motor and Align 100 amp ESC and 3 amp Align bec will power a Goldberg Falcon 56 very well using a 5 mm direct drive prop adapter and 10x3 APC prop. I made a motor mount out of sheet metal and mounted the esc on the side of the fuselage close to the motor with Velcro and tie wraps.
The motor will turn 19200 rpm on the ground and ran 77.7 gps mph in a dive running on 2 FP batteries.
Very pleased with the acceleration,top speed, flight times and screams like a siren as it goes by at full throttle.
I have around 2 hours running this combination and it has performed great and is reliable so far.
Using an AR 6200 rx and Hitec standard digital HS-5475HB servos with a DX7 tx for the plane.

The 600L motor gives better acceleration and more top speed than the open exhaust OS .45 FSR that I had on it prior to the conversion.
There is a limited amount of space for batteries in the fuel tank compartment and not enough room for 4 2500 FP so I run it on 2 2500 3s 25c FP in series and it is perfectly balanced with them.4 TP 2100 3s 15c in series, parallel fit well too and give more power and endurance.
It will take off in 35 feet, pull unlimited vertical at 3/4 throttle and give 5 minute flight times taking it easy with a couple of short full throttle bursts and come in at 22.0 volts.
I limit it to 5 to 10 second full throttle bursts to keep the motor from over heating and make life easier on the batteries.

I initially tried a 1650kv 600XL on 11.1 volts with a Align 75 amp esc and 4 2100 3s 15c TP batteries in parallel with a 11x7.5 prop to keep the rpm down on the high kv motor.The motor and esc ran cool but the plane was too slow.
So I went to 22.2 volts with 4 2100 batteries in series, parallel with a 10x6 prop and it turned 16500 rpm and was really fast but pulled to many amps and the ESC and motor got very hot in only short full throttle bursts. Went to a 10x5 and I pulled to many amps for to long and I burned the motor and esc up. So I ordered the 600L 1620kv motor and 100 amp esc and went down to a 10x4 prop and it was still very fast but was running very warm. Went to a 9x4 and ran cool and fast but climb performance suffered.Tried a 11x3 and still a bit on the warm side so went to a 10x3 and it runs great and runs cool.
It seems to be dialed in pretty well now and enjoy having more power than my old glow motor and no mess to clean up after flying.

[Aox]

I don't have much to contribute, but I do like reading about electric conversions of glow craft.

A buddy of mine has an old nitro PT40. Maybe it needs some electric love :D

Thanks for posting.

-Aox