drypipe

I am converting a .25 size glow warbird for a brushless inrunner. I have been looking at the 300W Himax 3615-2100 inrunner. A simple clam shell clamp will allow me to attach this motor on to the original nitro motor mount.
However, I would like to know does anyone know if there is a Turnigy inrunner equivalent for this Himax motor I am considering? I have been on Hobby City's site but I'm not too sure which one I should select?


Drypipe.

tIANci

Just look for any inrunner that is 36mm x 40mm with the same or nearest KV value of 2,100.

drypipe

Thank You. I just remembered that I do have a Mega 16/15/3 inrunner and I think the watts is around 300W? Do you think this can replace a .25 glow conversion?


DryPipe

tIANci

Drypipe ... the Mega 16/15/3 might be a 300W motor but its a 28mm motor and cannot turn a prop that is big enough to generate sufficient thrust for a 25 sized plane. Those 36mm motors are much bigger than a 28mm one. Mega 16/15/3 on 3S is good for a 6x4 or 5x5 only.

drypipe

Oh yes. That's right! it is a 28mm motor! duha... Don't know what I was thinking. I have not used it for quite awhile. I got it to replace the 480 motor on a edf jet one time.




DryPipe.

drypipe

Ok, I did find that Himax replacement: Turnigy 36/40/09 2250KV @ 350W,weight is 170g.

I also saw a Turnigy "Brushless Hybrid Inrunner/Outrunner": 36/46/2900KV @ 710W, weight 119g. Why does it weigh less? Would you consider this motor too much power for a .25 Modeltech ME-109? I like the fact that it is a inrunner on the outside but has the outrunner core rotating on the inside.

This will be my first Turnigy, I have read that the outrunners are great for the money, but how do the inrunners compare in terms of reliability?

DryPipe.

tIANci

Dry ... I like those 'hybrid' motors, makes it easier to use for some applications. Check the reviews and see what sort of prop was used in direct drive mode. For what little baby of yours I would say I want to go with a 3S 2,200 pack turning a 10x6E at the least if possible.

drypipe

Do you think the 710 watts from that hybird is too much for the airplane? If not, I'll get it! I have been planning to use a 4S 2500 mAh. There is plenty of room where the gas tank had been. But I'll have to see how the OEM CG comes out first, If too nose heavy, I may go with the 3S.


By the way, is a .25 nitro engine's total out put power really equal to the equivalent of 300 watts from a brushless motor? 300 watts EP does not sound like a whole lot of power.


Drypipe.

tIANci

Dry ... 700W is a lot of power for that baby ... do you want to fly a plane or the Space Shuttle? Lemme see the link for that hybrid ...

drypipe

Ya, I think that hybrid may be too much. I may get the Turnigy 36-40-09 2250KV @ 350w. The Me-109 is 3.2 lbs flying weight by oem specs, wingspan 45" and length 37"


DryPipe.

tIANci

When properly propped, 100W/lb is nothing much to shout about, don't expect big loops.

drypipe

What would you suggest for a Turnigy inrunner interms of watt output for the 3.2lb Me-109? I don't want to over power the model but at the same time, I do want it to fly at a safe pace.

With that Turnigy 36-40-09 2250 KV motor, I got about 109.36 Watts per pound now? Is this Ok or do I need more?


DryPipe.

tIANci

At 109w/lb is fine but do not expect huge loops that's all. I guess I am spoilt, most of my planes run at about 175-200W/lb ... what you will have is enough to fly her for sure. Let's rewind a bit. The Turnigy 36-40-09 review on 3S says it gets hot with a 9" prop pulling 50A. Perhaps you can get away with an 8x4 kinda prop, if you use throttle management. For me I would go with an outrunner but understand you have the wood rail mounts to deal with.