Archive for November 25th, 2018

25
Nov
18

Year end Newsletter from SNG

https://mailchi.mp/0d60974a644a/sng-studio-end-of-the-year-news

25
Nov
18

Progress on the Jantar

It begins. First off to Lowes. I found a large sheet of marker board for 10 dollars. A sheet of model ply would have been a lot more than 10 dollars and I have more than I need for all the templates. The nice thing about this stuff is the white side for marking is easily cleaned off with alcohol so an Elmer’s glue stick works good for holding down the printed formers and once cut you can easily remove and clean off the glue. It’s easy to cut too. So you can be very precise.

I dug out my old Sears Craftsman scroll saw. Haven’t used it in years but it still works well and did a good job of cutting two test templates. After they were cut I cleaned them up, lightly sanded the edges smooth and hardened them with some medium CA. Once the CA dries I sanded again. This made the edge very hard and slick for the wire to travel over. I have even done this with just cardboard for smaller scratch built foamies.

Tomorrow I pick up my large sheet of 4 inch thick blue foam but before I do any cutting I have to make up today the profile of the fuse and the station points for the templates. Nice to be doing this again after more than 10 years of dormancy.  The movie business has a way of taking over every moment of your life at times. Something I don’t miss but building planes I sure have.

25
Nov
18

Scratching building a 1/3rd scale Jantar Standard 2 sailplane

I have been looking at a number of possible builds for me. It’s been awhile since I’ve made a fiberglass fuse from scratch but I have done plenty in the past. But rather then make a plug and fiberglass epoxy molds and produce a composite fuse, considering doing something I did once that worked out very well for a one off. I don’t want to make kits anymore, I’ve done that.

What I did was wire cut blue foam using model ply templates both outside and inside of the fuse and glassed it with West Systems epoxy. This has worked out very well in the past with 90mm sized EDF jets. But what I’m planning here has not been done (to my knowledge) for a third scale plane.

I wanted to do a sailplane with a less complex wing then a Duo Discus or ASK 21. The wing for the Jantar can be easily wire cut in white foam, sheeted in balsa and glassed. I’ve done this many times but at 1/3rd scale for the Jantar I would be 195.6 inches and a fuse of 90 inches.

I ask you more experienced 1/3 scale builders, would it be more practical to go with a 1/4 scale build using this style of building or just go for 3rd scale and see how it rides?

It’s a beautiful older design and I really like the looks of the plane. If I do build it at 3rd scale it would be my first.

So far I have found plans that I can clean up and enlarge. A source for blue foam and I have several bows for wire cutting.




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