View Full Version : Motor,ESC,Battery Upgrade....?

09-12-2005, 03:49 AM
I purchased a Sig Kadet EP (Electric Power) 42. It came with a Speed 400 and Sig ESC (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2596) and is mounted and run direct drive. I am not pleased with this set up and I'm planning to change to a brushless (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=1904) motor and speed control, with LIPO (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=2455) battery.

I purchased a Park 400 (E-Flite) 4200kv inrunner and E-Flite 20amp ESC with BEC.I didn't know enough to make a smart purchase :mad: evidently. I now find out this motor needs a gear box, it will not fit in the old motor mount configuration of the plane. I can probably make a mount that will work. But, I get the impression this isn't the right setup for my Sig Kadet EP 42.

I want more power and longer flight time than the factory setup Speed 400 and ESC gives me. The planes flight weight (as per the spec's) is 26.2oz.

What motor setup will work best for this plane? :confused:


AMA #828982

Matt Kirsch
09-13-2005, 06:10 PM
Why not stick with the Park 400 now that you have it? It'll be far less expensive to pick up a gearbox and make the rather minor modifications necessary to mount the motor than it will to go out and get something else.

Go on HorizonHobby.com and pick up a replacement gearbox and pinion for a MiniFuntana (6.6:1 gear ratio) and 10x7 E-Flite props. When you get the gearbox, head out to your local hobby shop and pick up a small sheet of 1/8" aircraft plywood, a piece of spruce or basswood square stock that will fit in the gearbox's socket (maybe sand a little to fit), and a tube of 5 minute epoxy (you can also get this at WalMart for $2).

Cut a flat plate out of the plywood that fits between the cheek cowls on the Kadet, and about an inch long. Mark the centerline. Cut a length of the square stock and epoxy it down the centerline. Slide the gearbox on and secure it with a screw. Now screw the assembly to the original motor mounting rails in the Kadet, adjusting it back and forth so the prop is in the correct location, or even a little ahead of where it should be. You may need to shorten the square stock.

Install the motor, and voila! Instant motor mount.

09-14-2005, 01:16 AM
That is an idea that I may use. I also think the LHS will take back the Park 400 and the ESC since it wasn't special order. They could order me the right thing (if it is not the Park 400) and trade out the credit. But, if the Park 400 is the best choice, then maybe I'll stay with that.

thanks for the help

09-26-2005, 08:10 PM
JustGoFly (http://www.JustGoFly.com) 450XT is ideal for large planes direct drive. Motor Max 22 amp ESC and 10 or 11 inch prop would be the ticket. 10x6 for speed, 9x9 for higher speed, or 11x4 for high thrust.


Matt Kirsch
09-26-2005, 09:30 PM
The thing is, there's no one "best" choice. Your Park 400 is a perfectly fine choice, as would the justgofly.com outrunner, as would an Eflite Park 400 outrunner, as would any of about three AXi motors, as would a geared Himaxx 2025, as would a geared AstroFlight 020, as would any number of motors... They're all fine motors, and they'll make the plane perform beyond your expectations.