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IIRC, it usually takes a month or two to get orders from TT. From what I understand, he is very busy and can only work with the TT side of things every now and then. Oh, and in the winter his barn gets frozen in and he can't get to his stash of rocket stuff. |
#22
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Jeff, the reason I worked on this problem was so I could gap-stage small Standard Missile LR and Terrier scale models. (and also to have a R&D project for NARAM that year ) Back then staging electronics wasn't what it is now. I did manage to stage a peanut scale Terrier using a mercury switch stager at NARAM 34. It was a royal PITA to setup so I didn't continue to use that system on smaller models.
My first gap-staged SM-2 LR was BT-55 to BT-50 based. Gap-staging worked great, but the booster was stable. Despite the misgivings of others it works and the slip pod recovery system works. It is also very quick and easy to prep vs an electronic system. I do recommend building a boiler plate first before putting a ton of sweat into the final product. You might also want to consider the Perfectflite mini-timer. It sounds like it would easily fit in your project, but if you're doing this because you think gap-staging is cool then by all means have fun with it. Gap-staging is a lot of fun
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Quando Omni Flunkus Moritati |
#23
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Great story Jeff, thanks for posting! |
#24
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Post your snail mail addy and I'll send you some. How many you need? 2? 4? I have several left over from Berthas and other rockets (where they were just begging fo' mo' power ) Given your proximity, they could get there as soon as Saturday. Doug .
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#25
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Doug .
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Thank you, Buzz for all the information, including the old research paper. I appreciate your efforts. Where does one get those mini-timers? Although, in this case, it really is for the fun of Gap-staging. Also I'm trying to stay as close as possible to a kit bashed Baby Bertha--Two of them really, and pretend that they come with balsa nose cones which you can drill to make a tail cone. :-) |
#27
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Chad Ring has a really nice looking Aerobee 350 on page 24 of Sport Rocketry. If that's a BP motor back there, he might have gap staged that model. That Nike booster is most likely nice and stable on its on, so I bet he's got some sort of recovery setup with it. If anybody knows him, maybe you can shoot him an email for a quick bit of info on his rocket to see what method he used and how successful it is.
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#28
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Well, after I placed the order he emailed me stating something along the lines of "I'll pack that up this Saturday." That Saturday would have been the 8th. So he may have shipped on the 10th and a large parcel could take two weeks for delivery. I shipped a 17" LCD display to a guy with a ton of packing around it which took two weeks to arrive. I had read some cautions about slow turn-arounds, but he had some tube sizes I didn't see elsewhere so I figured I'd place an order, and of course, stock up on other tubes and rings at the same time. However, in most cases there was some redundancy in my ring and tube orders between the five order I placed. The CR2060s were only in the TT order for some reason. |
#29
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Hi Doug, Thank you! Reading your posting I realized I can steal the rings from some of the Baby Bertha kits I have on hand and replace them after I get my ring order, so I should be taken care of. However, that was a very kind and generous offer. On 40% off weeks, I stop by Hobby Lobby any time I'm driving near one (not worth a special trip) and usually pick up a BabyB. So I have a few on hand. I just didn't think of cannibalizing them. |
#30
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Hee, hee. My standard practice is to have them *tell* me what they think their code is doing. Their code is written in 'C'. Then I go reproduce it in assembly and see if there is a problem or not. Or in some cases develop a way of doing what they want to do. If they want to incorporate my assembly in-line that's okay with me. But if they want to fix their 'C' they need to debug it into actually doing what they told me it does. So I may be painting their fence, but I'm painting it with a can of assembly colored paint. |
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