X-41 Deltastorm - Maiden Flight Problems

X-41 Deltastorm

Built this really nice looking plane using 6mm depron foam but can't get it to fly.

Plan for this plane can be found as a free download on RCGroups.com

Motor Specs:

Model A22-15M
Weight 67g
KV 1050
Fit Prop 10×5
Current 6A-16A (max 20A for 15 seconds)
Max Watt 200w
Cells 3s Lipo

Recommended props:
# 8x4 APC-E (3 cells: 11A, 125W, 650g, 39mph, 10300rpm)
# 9x4.5 APC-E (3 cells: 15A, 160W, 800g, 40mph, 9300rpm )
# 9x6 APC-E (3 cells: 18A, 190W, 850g, 49mph, 8600rpm )
# 10x5 APC-E (3 cells: 19A, 200W, 1000g, 40mph, 8400rpm )

Currently driving:
GWS HD-8060 8x6 Hyperdrive Propeller

Category:

Entertainment

Tags:

• RC
• X41
• Delta
• Storm
• Model
• Plane
• Planes
• Aircraft
• Aeroplanes
• Electric
• depron
• foam
• pusher
• prop
• propeller
• Air
• cg
• centre
• of
• gravity
• torque
• roll
• crash
• rcgroups

[JC0926]

Did you ever get this thing to fly? I am having the same issues, cannot seem to get rid of the torque roll, or find the CG. I believe I have enough power using the Turnigy 2836-2350, 40 amp esc, 6x4 prop, 3s 2200 30c battery... Please share any pointers if you can, I would really appreciate it!!

[FrostbiteUK]

@JC0926 - Yes, I put a 2200kv motor in it and a 6x4 prop, the CG was as per plan in the end. Try a smaller 5" prop if you can. I will try and take a video next time I take it out. 30amp ESC & 3s 2200mAh battery used.

[T3chDad]

Tail heavy, and not enough power. I know you said it has more than enough power...no it doesn't. With all of my Deltastorm series planes, I can punch the throttle, from a near nose-up hover like yours was in and it will shoot straight up. You need at least a 2200-ish kv motor that can pull about 25A with a 6x4 on a 3S 2200mAh 25C.

Hope this helps...

[FrostbiteUK]

@T3chDad - Thanks Bob. It was a torque roll problem. The motor had enough power but required a larger 8" prop @ 950kv which produced too much torque. Motor replaced with a 2000kv and a 6x4 prop and the problems went away.

[FrostbiteUK]

@T3chDad - Just a thought Bob, are you using in-runners or out-runners?

[flyvertigo]

You need a higher KV motor. You are definitely underpowered. That motor works better with bigger props.

[FrostbiteUK]

Yeh, a 2000kv motor is needed here so it can run a smaller prop. Torque is the problem here. The plane has more than enough power as it is, it can hold it's own weight from my hand, however, power is no good without control.

[JC0926]

@FrostbiteUK Well I tried both with no success... Thanks for the tips, I will give it another try some other time.

[FrostbiteUK]

Thanks, we have tried the CG at both extremes front, back, centre and everything in-between. The battery was a 3s 2200mah (180g) I'm going to try a higher KV rated motor with a smaller prop as this seems more like a torque problem the more I look at it. Slowing it down on the replay really helps diagnosing what's going on. I keep saying that's it, I'm not bothering again with this, but then pick it up again the next day and have another hack around with it. It's not going to beat me!

[rcramosrc]

i hope u figure it out. I scratch built a plane where the wing location was similar but they were swept forward, and I didn't hv much luck. can you not move the cg any more forward??? or maybe just adding weight to the nose. if that works then possibly go with a heavyier batt, if u were using the batt placement to adjust the cg. don't give up so easily. that's what scratch-building is all about. if u don't suceed try, try again.