Hello,

Need help with my scale project for a 96" DC-3. Orginally the plane was designed around two SuperTiger 51s. I'm almost near completion, and a lot of my buddy aeromodellers are insisting I should switch to electrics since too much effort has gone into this scale project, and reliability of engines for twins is quite a scary issue, i.e. loss of one engine in flight and the subsequent control of the plane. Given the following specs I would like someone's input as to how should I ( or perhaps not) go about the conversion to electrics:

Wingspan: 96 in.
Total Weight (without engines & fuel tanks): approx. 9 lbs.
Wingarea: approx. 850 sqin
Max Prop size allowance: 11 inches
Minimum Fly time: 10 - 15 min.

I tried Motocalc and input the required parameters, but it does not give any options as such specs are not supported by any of the available motors and batteries.

I would appreciate an honest and calculated response whether to try my hand at electric conversion or not. Thanks

Osman Khan

Osman

the answer is yes

you need about 100 watts of output per pound of plane for a trainer like performance

thats a total of 900 watts 450 out per motor

on a 5s setup to each motor thats a current draw of 26 amps

The Neus are the motor efficient motors about and two 1907/2y's should give up to 11000 rpm at each prop and they shoudl be relaibly run on 35 amp controllers - I recommend Thunder power 2100's as they have the capacity, the best power to weight ratio , and good power when you need it

This setup will be very torquey and easy flying

Thanks for the response Andrew

Any idea how much weight will this set up add (two motors, batteries and esc etc) to the plane.
Shouldn't your estimate of 900W include this added weight too? In other words the wattage should be for the All up weight.

Rgds
Osman