RE: Gilbert .11 Engines
Say what you will, The Gilbert with the dual exhaust pipes just looks way cool. Plus the fact it was mfd. by Gilbert an true pioneer in the toy/hobby buisness witha great deal of interesting history behind it. Who hasn't had an Erector set? OK some of you younger folks may not have. However if you grew up and reached age 18 before the Atari video game system became popular, most likely you did if your family could afford to. I also had one of the Chemistry sets as well. One of the better ones. Also made by Gilbert.
I wouldn't place the performance as better than any equal size motor. One cannot deny that they do look so cool mounted in a period plane.
Robert