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So i finished the build. I was worried about the CG going electric and with good reason. I had to put every available thing in front of the firewall to get the CG to come out right. That includes both the retract battery and the receiver battery & ESC. i went with the biggest receiver battery i could fit just because i needed the weight. I also 3D printed the radial dummy engine and that added some weight as well. Have not flown it yet due to the current virus situation. Some pictures below.
I decided to mount the dummy radial to the motor mount ring instead of the cowl. This way it stays with the plane when the cowl is removed.
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Originally posted by bandit View PostSo i finished the build. I was worried about the CG going electric and with good reason. I had to put every available thing in front of the firewall to get the CG to come out right. That includes both the retract battery and the receiver battery & ESC. i went with the biggest receiver battery i could fit just because i needed the weight. I also 3D printed the radial dummy engine and that added some weight as well. Have not flown it yet due to the current virus situation. Some pictures below.
I decided to mount the dummy radial to the motor mount ring instead of the cowl. This way it stays with the plane when the cowl is removed.
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Nice work there bandit ! Great job with that cowl space...Would you ever consider a scale 3 or 4-blade prop for her?My YouTube RC videos:
https://www.youtube.com/@toddbreda
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Was gonna ask the same considering the freakin awesome printed radial only to stick a 2 blade in front of it. Definitely worth the invest into a Ramoser for thisWarbird Charlie
HSD Skyraider FlightLine OV-10 FMS 1400: P-40B, P-51, F4U, F6F, T-28, P-40E, Pitts, 1700 F4U & F7F, FOX glider Freewing A-6, T-33, P-51 Dynam ME-262, Waco TF Giant P-47; ESM F7F-3 LX PBJ-1 EFL CZ T-28, C-150, 1500 P-51 & FW-190
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I have considered a 3 blade, but to get the same performance as this 2 blade setup, i would need a larger motor and the current draw would go way up. As it is here, i pull 80 amps. The plane weighs 23lbs and i have 22lbs of thrust giving me almost unlimited vertical, with a static prop speed of 70mph. Flight time with throttle management is about 8 min.
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Yeah I figured the 2 blade would be able to give you best performance with lower amps...I went with a 4 blade for my ESM 85" Corsair though because, well, I couldn't help myself, lol. Looks over performance, that's my stupid motto of the day!
My YouTube RC videos:
https://www.youtube.com/@toddbreda
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bandit You're not weak...……. that's the scale freak in ya coming out
PS.....you can see a 3 blade when it spins or you aren't staring hard enough
I've got a ESM Tigercat which meant I had to swallow twice as hard for the Ramosers but DAMN does it look goodWarbird Charlie
HSD Skyraider FlightLine OV-10 FMS 1400: P-40B, P-51, F4U, F6F, T-28, P-40E, Pitts, 1700 F4U & F7F, FOX glider Freewing A-6, T-33, P-51 Dynam ME-262, Waco TF Giant P-47; ESM F7F-3 LX PBJ-1 EFL CZ T-28, C-150, 1500 P-51 & FW-190
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I had Ramoser varios on a balsa Stuka a few years back and my oh my, worth every penny.My YouTube RC videos:
https://www.youtube.com/@toddbreda
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Love the progress Bandit. Someone needs to come up with a replacement prop shaft for that motor that is longer to allow the dummy radial to sit further back in a more scale position. Or do any of the larger electric motor manufacturers provide motors with extended shafts? I'm sure it would put more load on the shaft bearings but even just another 1/2 or 3/4 inch would make a huge difference. That too forward dummy motor has always been a problem with radial engines looking right. Another option would be to slide the dummy engine back a bit to get the right distance from the front of the cowl and disguise the front of the electric motor as the gear case behind the prop. Just thinking out loud.
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Check with TruTurn ! I had to purchase after market shafts for all my larger epower models, depending on the brand of motor selected.
There is a lot of talk on electric motors on all of these new planes, however I don't think one video exist ( even from the staff ) at motion.
Plenty of video on gas power, would love to see the actual model in use with 12s, and get some real world numbers.
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So i finally got to maiden the Corsair this last weekend. No major issues except for the Prop. The three blade looks good, but at least for electric is just not as efficient as a two blade. I was pulling 91A full throttle at 8700 RPMs. Had to fly at 3/4 throttle just to keep it in the air. Even at full throttle it was slow. Will switch back to my carbon fiber two blade this weekend and see how it does. Should be fine since i flew the Top Flite corsair of about the same weight and size with no problem, I also had to put a fair amount of up elevator to get it to trim. The CG was set exactly at the position specified, but i'm definitely nose heavy. I'll make some adjustments before my next flight. I have a video, but hasn't been downloaded yet.
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