#31
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#32
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Very nice! I was going to use my Rubicon just because I almost never fly it anymore and it's close to the right size. But Semorc carries BT-101 which is only 3/100" off from being 1/100th scale diameter for a Saturn-V. A booster about that size would be pretty flippin' cool for the Bug. Also, I have to comment on the guy in the photo: Moustache, pork-chops, turttle-neck, sport coat - that was one happanin' rocketeer. Quote:
Not a bad idea. We use "DOG BARF" at our section launches, but most of my streamers are orange party-store streamer. Quote:
I'm still leaning towards the 24mm motor mount. It allows a lot of flexability, like 24mm "D" motors... I have done this with finless cones, and it worked fine as long as I had the longerons installed. Without them, the cone collapses when launched on a "C". I checked last night, and the streamer will fit into an 18mm "B" motor, so I will have to give that system a try. I'll drop a bit of Dog Barf into the motor, then slide the streamer in on top. I have found that adding DB in the ejection end of the motor also reduces the amount of schmutz and gunk left in the cone, it also reduces burning (when you use a booster motor). Thanks guys!
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John Adams "There is a lot of rocketry under 20ns" |
#33
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The wife and kids are still sleeping, so I had time to work on three Bugs.
I have one that will not get an engine. I am using it to check glide trim for the others (best glide CG location). I call it Enterprise. The others are: Columbia:: Standard fins Challenger: Stubby fins Discovery: No fins ( it's NEKKID!) If I make three pop-pods, I'll be able to check performance differences with drag races. I have fuselages for Atlantis and Endeavour but don't know which variant I'll use them for. One will use the Quest HL-20 shroud I have sitting on my desk. Original names, I know, but why not?
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John Adams "There is a lot of rocketry under 20ns" |
#34
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Got any pic's?
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If it flies, I can crash it! |
#35
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Funny you should ask... In the first two pics, they are (from left to right) Enterprise, Columbia, Challenger, and Discovery. The next two are of Columbia with the 24mm motor mount removed (I have not glued any of them in yet) The last is the tail end of Enterprise to show the trim weights (2 U.S. pennies)
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John Adams "There is a lot of rocketry under 20ns" |
#36
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And we have side views of Challenger and Discovery, and a look at the motor mount/nose cone/bulkhead assembly.
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John Adams "There is a lot of rocketry under 20ns" |
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Thank you for posting those pictures (and I concur with your name choices)! I noticed that Enterprise does not have the "inverted-Vee" semi-monocoque skin stiffener longerons (beams) that you mentioned earlier in this thread. Does Columbia (the 24 mm motor powered X-24 Bug) have them?
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR Last edited by blackshire : 04-29-2012 at 01:38 AM. Reason: This ol' hoss done forgot somethin'. |
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Your welcome! My wife gave me a few odd looks while I was taking the pics Enterprise doesn't need the longerons, but the remaining three will get them - I just need some spare time to whip them up. I'll post pics as soon as the glue dries. I still have to cut the slots for the launch rod. Oh.. Trimming tip! - DO NOT glue the motor mount in place until trimming is almost complete. Enterprise has the bulkhead glued in only, this way, when the thing nose dives into the dirt, the nose-cone and motor tube just slide backwards. Since the fit into the bulkhead is pretty snug, it acts lie a shock-absorber preventing the nose cone from getting all banged up.
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John Adams "There is a lot of rocketry under 20ns" |
#39
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This is a cool thread.
I'd like to make a suggestion though: I think the fin design on the Quest HL-20 is superior to the old Centuri X-24 fin design. The folded leading edge on the HL-20 would seem to reduce surface drag by 50% and eliminating the three draggy lugs in the fins can't hurt either. I'm not being critical, this is just a suggestion since you seem to be embarking on a development program. I am insanely jealous of anyone having the time to do this. Perhaps the article with the HL-20 style fins could be Atlantis or Calypso or Beagle.
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NAR 79743 NARTrek Silver I miss being SAM 062 Awaiting First Launch: Too numerous to count Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774 On the Bench: 2650; Dream Stage: 1/39.37 R-7 |
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One other mod I prefer on these type designs is to mount the launch lug on the motor tube. The triangular ring thingy will need a relief cut in it for the lug, and the shroud forward will need a little hole cut in line with the lug. But the birds will move up the rod on-axis at launch, which should get them in the air with a little more velocity. Doug .
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