Carl wrote:
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The original plans were provided by Rocketflyer. I made three sets of parts from his plans and sent them out some time ago. Buzz (Eagle3) got one of the sets.
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I was wanting to give credit where credit was due, so I was looking for real names. Does Stine's Handbook list names like " Joebillybob1999"? If people want to be anonymous, fine. I tried. But I realize I have woken up a pretty cold thread here, and the Super Bowl is going on, and so forth (I have it recording on Tivo, and about to get to it when I finish sending this). So hopefully they will run across this soon and if nothing else contact me privately if they do not want their real names to be known on YORF.
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As far as I know, none of them have been finished and flown.
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Don (barone) mentioned flying his F/F version in message #124, on this page:
http://forums.rocketshoppe.com/show...3&page=13&pp=10
I saw the video, and things sure happened fast. He suspected the clips holding the elevons flat came off on boost. Perhaps. But after the first 180, that second 180 looks so tight that it made me think of unstable rather than just up-elevons.
What makes this bird so tough is the big heavy engine in the back, that it ejects. So if the CG is right for glide, it is tail-heavy with the engine in it. So, if it is tail-heavy enough, it could go unstable.
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If you want to try a set, I will send you one.
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Thanks for the offer, but my interest is for documenting whether this really was the first R/C B/G, or not (and if not, then who/what beat Malewicki, as it seems he was flying rudder-only pulse before Larry Renger’s SkyDancer).
It would make a good update of the history to show that somebody flew one these days, with modern R/C gear and a suitable composite motor. Possibly being the first in history to actually fly it R/C?
The F25 is way too hot for something like this, whether F/F or R/C. I flew my 1/72 shuttle stack (ET &SRB’s) with an F25, and it weighed 2.2 pounds plus the drag equal of something close to a 6” tube, and even with all that it flew so fast on boost it demanded 110% of my R/C reflexes. Yes, I said 110%, so I was only able to give it about 90% the control response it really needed during boost. Sort of the same thing when I flew my SkyDart 2X on an E11 reload, I was always “behind” in making boost corrections, it was a dream to boost on an E6.
It is too bad the old Aerotech F15 is not around anymore. In any case, a 32mm RC casing with an F13 would probably be very good for an R/C version of this, and if that worked out well, with its 3.5 second burn, then go to a G12 load with the 8 second burn.
Otherwise, a good first-flight motor for this bird would probably be an E15. Well, perhaps better would be a 24mm E12 reload (or F11 reload), or the 24mm R/C casing E11 reload. I am not that much up on Coaster engines, but for sure the FSI F100 and F7 were weak F engines, usually in the 50-55 N-sec range. And nothing says you have to make a first flight on the biggest engine that will fit in it. I never fly a new R/C model on the biggest engine it can use, I always do first boosts on lower power first to see if the boost trim is set well.
- George Gassaway