On 12/05/2021 10:58, Harry Bloomfield wrote:
It happens that Brian Gaff (Sofa) formulated :
So it basically had what looked like two Tea bag sized batteries with
wires at the top corners. the plane was made of flimsy polystyrene
foam and the motored seemed to be some kind of brushless design with a
big slow propeller on the front.

I don't recall brushless being possible in the 1960's.

Brushless controllers depend on microelectronics that didn't exist then.
It would have been a can brushed motor and a gear box probably


--
"I am inclined to tell the truth and dislike people who lie consistently.
This makes me unfit for the company of people of a Left persuasion, and
all women"