In article ,
Fredxx wrote:
On 12/05/2021 12:48, The Natural Philosopher wrote:
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

Someone in the knowledge of electric motors would know that the
brushless motor was invented in 1962 because of solid state tech.
Brushless commutation doesn't have to depend exclusively on
microelectronics.
https://www.kdedirect.com/blogs/news...brushed-motors

First ones I saw in practice were on a Clerk-Technique pro 1/4" tape
machine. About 1970. The design later made by Levers-Rich.

--
*IF ONE SYNCHRONIZED SWIMMER DROWNS, DO THE REST DROWN TOO?

Dave Plowman London SW
To e-mail, change noise into sound.