3LakesJim's blog View Details
Posted by 3LakesJim | Apr 12, 2019 @ 03:19 PM | 830 Views
This blog entry will be about trying to scratch-build a small hi-start glider. This started when I got interested in trying a hi-start so I bought a small one from RetroRC. (see picture 1) I showed it to Don Bailey at our local Barnyard Buzzards club field, who advised it was best suited for a miniature stick-and-tissue type plane, so I started looking.

First step, I found plans on Outerzone for a 30in span Slingsby Prefect, and printed them out (picture #2), and saw the whole model could come out of a single sheet of 1/16 balsa (and a scrap block for the nose).

Next came the electronics. I was interested in trying out a Spektrum brick, but they are pricey, and currently not available. After a lot of web searching I found Oversky RC who sells a bunch of tiny electronic stuff, including a brick receiver knockoff. At $28, I ordered two, with a couple of tiny 50mah 1s batteries. I also got a matching brushed motor to try on a future project. BTW, they also have FrSky and Futaba versions of the same receiver.

To test the receiver, I cut out a tiny hand launch glider using foamboard left over from a FliteTest project, and mounted the brick and battery. (pictures 3 and 4). I guessed the CoG needed to be about 30% back, it took three pennies to get it there, so maybe the nose could have been longer! I hand tossed it a couple of times - it was a lousy flyer (being heavy) but it did respond OK to radio commands, so it proved the approach might work.

At this point it was time to start the Prefect, so I started cutting the tiny ribs. I'll post that next.