I ran a lot of Wen Macs as a kid and probably got everyone's engine going that I knew. it wasn't magic it was glow plug and battery. They wouldn't start if the battery was even a little off full voltage and the plug had to be hot and clean. They liked to be a little wet and they actually did put out decent power on Cox sport fuel. You never used those rubber band props did you. They were the problem of so little thrust. I did have a Wen Mac on a flite streak and it did keep up with a Baby Bee but it was swinging atop Flite 5/3 prop which was rigid and gave more thrust then a wobbling rubber band. The best of the lot were versions 1/2/3 after the Rotomatic starter was added the drag was just too much to overcome. unless you removed it which we did in short order. I wonder if many remember that the first engines had anodizing. Mine looked really good when it was new.
I still have the booklet from the first Wen Mac that I owned and it is from the one of the earliest run of Wen Mac motors. it was a classy booklet the kind that made kids want to get out and fly. Have a look
Dennis....wow....this is the first time I have seen that booklet since....well....back then I guess.
That anodized Wen-Mac was my first engine....must have been 51' or 52'.....what a beautiful thing it was...at least to my eyes!
But....there was not a soul in Tulsa at that time that could make it run.
It would only run out the prime.
My Dad and I took it back to Harvard Hobbies and even ol' Buck Tiers could not start it....so Buck being the good guy that he was and owner of the shop did the right thing and took back the Wen-Mac and replaced it with a K&B .049.
Of course the K&B was very easy to handle and ran very well.
I flew it for several years on logs and a couple of scratch built turkeys.
About 60 years later I spoke with Bill Schmidt about some Atwood .049's that I wanted to fly and he explained what was likely the problem with the WM.
My own opinion regarding the early WM was that the shaft may have been miss-timed.
I am only guessing but even though that WM never ran....I never gave up.
Luckily at the time in Tulsa there were (and still are) legions of modelers that were mentoring us kids.
Just a few are....Charles Gilliland, Buck Tiers, Harold 'Bud' Marr, the Kerr brothers, De Hill, George Milliken and a little later George Aldrich.
And I cannot forget the entire Tulsa Glue Dobbers.