I have to ask --- why do you want to use flaps for take-off? Models invariably have more power than brains, & getting off the ground is hardly an issue. Getting off the ground with flaps, however, has unexpectedly killed many a nice model. It's "Off we go and -- OH ***** --- damn, I hate it when that happens".

In other words, think twice about why you want to do it -- and if you do, be ready for a moon shot at low airspeed.