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I still have some FSI D18's and D20s dated 1989. All were kept in a finished basement and have never suffered any temperature cycling. I test fired some D18s last year and they worked fine. However, all 4 of my E5's CATO'd. By the way the motors I have are all 21mm x 100mm and not the 21mm x...

Almost finished my Kopter Pterosaur. All I have to do now is balance it, paint it, etc.. etc ..

Oops I wrote phoenix instead of Pterosaur.

Rktman, You can get many of the Estes parts the are no longer available from Estes at erockets.biz (see attached screen capture). I used the Semroc NC-55 for the larger tube. I already had the Estes BT-50 nose cone pack which includes a plastic one that is similar to the one in the parts list so...

Aerostadt, Thanks for the input. I'll have a look at those reviews. I'm in eastern Ontario so not that many big flat fields - a lot like northern New York - hills and forest and farmland (that the farmers don't like being trampled). The weather being what it is I doubt I'll even be able to get...

Aerostadt (or anyone else) - Work on the Pterosaur is progressing well but I had a thought. The only thing I saw in the construction that might allow the Pterosaur to spiral back is to taper one side of the rear of the rudder. Not wanting to chase a rocket (assuming all goes well), I wonder if...

Thanks for the encouragement. I'll keep posting my progress. Walter Senoski's design is excellent though some parts I'll have to improvise as they are hard to get now. Kind of neat to look at his original 1975 patent https://www.freepatentsonline.com/3888178.pdf. He put a lot of thought into...

Started to build my own Kopter Pterosaur. As noted by aerostadt the plans call for a complicated jigsaw puzzle to construct the wing. So I cut out the pieces in posterboard and fitted them together. From that I got a triangle shape of 21 5/8 in. wide at the base by 13 3/4 in. high. See attached...