Found an Ad for this in Air Classics this morning.

I have a Nikko Boeing 747-300 (glued back together for display only) that uses the same principle.  No control surfaces at all.  Just throttle.  Turn right and outer right hand motor slows.  Turn left and outer left hand motor slows.  Full throttle it climbs, throttle back it decends.  Well, in theory anyway.

My late brother had just been to visit and showed off the model to our mother.  He was so excited!  It stood at his gliding club where he left it just before his own fateful flight.
I was determined to fly it in his honour, which he never got to do.  So, batteries charged, no wind, grassy sports field, full throttle, a gentle push- Splat!  Belly-flopped not ten feet in front of me.  No lift at all.  Tried again but this time I hadn't noticed that one of the motors wasn't working, so this time it spiralled in, smashing into several large chunks of foam.  Ah well! At least I had all the bits so I could glue it back together as a display.  I think my bro would have been a little disappointed.
I quickly lost any affection for the Boeing after my failed flight attempt.

These differential thrust dual motor planes basically fly like single channel rudder only aircraft with auxiliary throttle. (I say auxiliary, because that is the way it was with stuff 50 years ago. My Ace pulse system was modified with a quick blip push button throttle that toggled from high, to medium, to low / idle throttle, then back to high. The escapement systems toggled between high and medium/low throttle, depending on how set up.)

About the only down side with these motor only planes is that there must be adequate engine battery because they are the only steering mechanism.

About 8 years ago, I bought a Messerschmidt ME-110 dual engine bomber engine only R/C plane set. It had about a 17 inch wingspan. However, the battery systems then, although improved over earlier, was less capable and had shorter flights. It didn't do so well in our normally windy climate here. Kept it thinking to install the radio in a balsa plane, but it was hard to salvage being glued in place, primitive one-shot type installation, had to give up and toss it in the trash.

It is nice to see the return to the old days, in this day and age of sophisticated radio systems and controls.

Rod I read your brother died in a flight accident recently..accept my condolences..

balogh wrote:Rod I read your brother died in a flight accident recently..accept my condolences..

Thanks Andras.  I appreciate your words of condolence but it wasn't recently.  Almost 16 years ago actually.  He was in the Royal Australian Air Force in a desk job but died at an airshow while demonstrating his powered glider.  They never found a firm cause for the accident.

I thought it strange that he was so excited by the little Nikko Boeing.  He'd flown (full size) all his life and been on a number of flying adventures.  

Pete flew his little VW powered single seat Luton Minor all over Australia