TAKING THE NEXT STEP-Brushless

[superfly]

Hello Revered Cub Masters

I have taken the step and a little apprehensive in getting to the sky. I'll first relate the set up and then then the big question about proper thrust angle. I have done the wing saddle mod, battery box mod(vertical battery placement, eye-type screws for the struts, 2.5 Dubro wheels. I am NOT doing ailerons at this time.

Make up as follows:

New fuselage, tail, elevator
Using the stock wing from my old LP w/stock struts
30 amp ESC from Eflite Apprentice
Turnigy 1000kv brushless motor
One piece alum motor mount
Orange 615 rx
DX5E tx
2200mah lipo battery
HS-55 servos (2)-----for elevator and rudder.

I have a CG device (courtesy of CH thru whoever he got it from) and had to add weight near the cowl to get it level.

So the question. Has anyone had this similar setup, especially the motor mount configuration and successfully taken off? The trust angle seems a bit severe. As this is my first plane built I really don't have a clue. I simply direct bolted on the alum motor mount to the plastic firewall after the motor was mounted. All seemed to go together perfectly. Any comments/advice, my teachers?

[flydiver]

Oct 10, 2013 4:33:37 GMT 1 superfly said:

So the question. Has anyone had this similar setup, especially the motor mount configuration and successfully taken off? The trust angle seems a bit severe. As this is my first plane built I really don't have a clue. I simply direct bolted on the alum motor mount to the plastic firewall after the motor was mounted. All seemed to go together perfectly. Any comments/advice, my teachers?

May depend on the particular mount. The firewall creates the thrust angle for the stock Cub. If the commercial mount already has an angle built in then you may be adding them together. You should be able to take it off with motor attached and eyeball it on a flat surface to see.

[superfly]

BINGO, Fly....the commercial mount has an angle, as well...I am getting in touch with the seller to see if there is a mount available w/o the angle..another option is to shim to level or remove the plastic firewall and build some sort of a foundation, ie wood or plastic, glued to the foam nose. Any suggestions? I'm certain if I tried to fly this Cub with the current beak on it, it most certainly would not have ended well...Thanks, as usual.

[superfly]

Well, the seller got back to me very quickly. Here's the quote: "I know that the thrust angle looks extreme, but it matches the stock thrust angle of the motor. The firewall and the motor both have a thrust angle. I think it looks weird too, but once everything is installed you will see that it works nicely." So...I got an old stock brushed motor mount out and laid it on a flat surface. Lo and behold it has an angle in it as well. Go Figure...but I wont aim it at any goalposts which is an historic video of sorts for those who haven't seen it....comments?

[flydiver]

Not necessarily. With more power you often need more thrust angle. It's there to compensate for the motor torque. Thrust angle is most noticeable during acceleration. It makes less difference during cruise.
Ask the guy if you should mount it on the installed firewall or on the "bare" firewall. If so you'd need to remove it and replace with some light ply or such.

[superfly]

Indication is that its supposed to be on the firewall. I did ask that question. Hopefully I will apply just the right amount of throttle and this bird will pop right up. Thanks for your input, Fly,

[jklong03]

Oct 11, 2013 5:01:44 GMT 1 superfly said:

Indication is that its supposed to be on the firewall. I did ask that question. Hopefully I will apply just the right amount of throttle and this bird will pop right up. Thanks for your input, Fly,

I bought this same aluminum mount and screwed into the existing holes on the stock mount. The angle only looks extreme because of the added length of the extended mount. The brushless motor is much shorter than the original brushed motor. Mine flew just fine and the motor hub lined up with the stock cowl just fine.

Bolt it all together and go fly, you'll be fine!

[superfly]

A big ole' panic about nuthin'. It took to the air like it was supposed to..Thanks for the encouragement, jkl.