Near Miss (oz9102)
About this Plan
Near Miss. Free flight power model.
Quote: "The Near Miss is an adaptation of a design by Vic Gays of London which was designed for the old FAI (International) rules. When we were staying with Vic a few years back, we asked if we could have the plans for his model - which we had seen flying and looked very promising. His model had been powered by an Olive Tiger and we wanted to put a K&B .15 into ours - give us a good glow engine anytime, it seems to have the ability to accelerate during the climb, which a diesel does not seem to do.
Our model was built and weighed in at 18-1/2 ozs. Taking it out to the local flying field, we found the model to be one of the most tricky we have ever handled. It seemed okay for the first 2 or 3 seconds of power, then it would flatten on the turn and come down in a shallow dive at terrific speed.
We suppose that we made about 30 test flights and never got the engine run up over 5 seconds. At this point, we asked our flying friend Silvio Lanfranchi to join in and solve this problem. Down thrust, side thrust, more incidence, less incidence, moving the CG back and forth, all seemed to have little effect in obtaining the de-sired power pattern.
Finally, Silvio suggested that we increase the incidence drastically to plus 1/4in and also to move the center of gravity back about 1in. A frightening thought, but what else was there to try? Immediately, the power pattern worked out and we were able to get the necessary full 15 seconds engine run, every time.
About this time, the FAI trials were coming along so we decided to up the model's weight to 27-1/2oz, change the prop to an 8x3, and take a crack at the trials. We felt we had a very good model... "
Scan from DBHL, cleanup by theshadow.
Direct submission to Outerzone.
Update 23/01/2018: added article, thanks to RFJ.
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