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burkefj's blog
Archive for November, 2011
Posted by burkefj | Nov 28, 2011 @ 01:45 AM | 6,841 Views
I've been secretly working on a space shuttle over the holiday, in between working on my 72" tall Pershing 1A rocket.

I'll be posting pics and progress as I go along. 26" ws and 35" long, approx 13.5 oz rtf planned.

This will be a full fuse, cockpit will be laminated depron sanded to shape and nose will be a two angle piece to give it an approximate shape, because I'm too lazy to do a multi piece compound curve and am trying to keep it simple. The rear oms will be a tapered half round to give an approximate look, but is not meant to be an absolutely correct scale profile.

The only carbon is the wing spar 1/8" carbon tube, and 1/8" carbon strip to stiffen the vertical tail.

I added formers to aid in getting the payload bay shape and also added depron strips to help locate the fuse sides in place.

I'm using some rocket nose cones cut off and glued on to the back as placeholders for nozzles till I find something the right size or make something better.


Made more progress last night, finished the other side. I was really not happy with the cockpit so I re-worked it using four pieces of 3mm depron, two sides, a wraparound, and a cap. It looks much better. I also discovered that the 3-view I had used was really crappy, and I reworked the OMS rear end a bit.

I also did some of the markings using trim monokote and will only need to paint the bottom flat black, and use a flat overspray over the monokote.

****Reflections and Notes******

I'm sort...Continue Reading
Posted by burkefj | Nov 04, 2011 @ 02:26 PM | 11,373 Views
I'm re-working my profile X-20 rocket glider to have a simple fuse shape to give it a bit more scale shape. I'll post photos as I go along and eventually update the plans. I adjusted the fuse profile a bit, you could build it as pure profile or add the side/top pieces.

I did wind up adding two carbon strips to the wing sides to help with flex on landing if you come in tail first, I felt there was a bit too much and it might crack on a hard pitch up tail first landing. It is now pretty stiff. The fuse pieces fit pretty well as cut, just minor trimming for each side as needed.

I finished the frame up and rough sanding, and did a gob of inside the house test glides to get the CG range, and double checked with my cg calculator and a couple of older threads on deltas, in addition to my profile version. I found with the full fuse that the CG was about 1/4" rear of the simple profile version. It was a bit more back than I had calculated but my test glides with a 20 degree nose up mush push glide produced the desired pitch over at the rearward CG.

I did two test flights this morning, using 3/4" up trim for post boost glide to compensate for the nose heavy condition. This was my first time launching by myself so I had to hold the battery and ignition wires in my left hand, cradle the radio and get on the sticks quickly I learned an important lesson doing this, on a cold day, do not stand directly behind the model, as it pitched forward and stayed in the exhaust...Continue Reading