Rick, again,
Take offs, I believe I went into what is envolved with a post for
another modeler, so won't repeat.
Take offs can be simplistic, the actual take off no different from
an airplane plus 100% fool proof baring any stupidity!
But some advance doings are required
Will describe my way, but know I use 60" rotors and that seems
the limit for the average man's arm.
You need a prop spinner om the blade hanger, About 3 ft. of strong string tied to the tail wheel and a drill motor capable of at
least 500 rpm, my B&D is rated 700.
Proceedure goes like this; you need an assistant, with experience it can go solo. With the engine running the pilot stands on the string. the assistant winds the rotor up with the drill motor as this is happening the pilot gives full power.
Once the rotor reachs maximum RPM the drill is removed and the
pilot assures he is ready and steps off the string.
When released the rotor is very near lift off RPM and with full power acceleration is quick so flight RPM comes soon.
Neutral elevator seems fine but even some up when rolling does
well,
90% of the time the pilot does nothing but watch, otherwise
maybe a touch of rudder if a wind gust comes along
With the larger rotor there is a physical problem but suspect an
extension could be added to the drill handle to solve that.
With all the advise your bill will get extensive, so you better have
fun with all this!
Good luck,

Hal deBolt