Activity

It’s not the weight for the sake of weight, it’s the moment arm of having high density, high mass fins out far from the centerline trying to lever the fins off the body. Use low mass material – hell I…   Read more»

If one would be fun, two would be better, so tell you what. You and John make the booster, Chris and I will make the sustainer, and we’ll hit 100 kft together.

It’s not the weight for the sake of weight, it’s the moment arm of having high density, high mass fins out far from the centerline trying to lever the fins off the body. Use low mass material – hell I…   Read more»

I suspect that for this kind of rocket, drag is a larger problem than a few ounces – you’d probably get higher with solid carbon fiber fins made out of layers of uni aligned in different directions than you would…   Read more»

John,I suspect you already have a 75mm VK cone from PF. My take would be to lay up low mass fins out of honeycomb and multiple layers of CF, Kevlar and perhaps glass as a sanding veil like my L3…   Read more»

That definitely sounds like the way to go, Adrian. A VK cone plus single thickness tubing would probably have a pretty significant gain compared to the double wall with a conical (though if I remember right, the conical does do…   Read more»

Cool. I’m interested. You would definitely want a Von Karman cone for it. I can ask my friend who did the mandrel for my 38mm VK cone to do the same thing in 75mm. The length may exceed what he…   Read more»

Honestly, I’d say CF should easily hold up if done right. I’m thinking of something like Jim Jarvis’s LDRS 25 rocket (4″ MD on an N4000), scaled down slightly. I’d be pretty surprised if you got too much beyond M3…   Read more»

I’m in John. Let’s discuss when we get together to v-bag your fins. I even have a Kevlar conical we can use.Warren

Perfect. Thanks.

She has her own web sitewww.photosbynadine.com

Thanks for getting the great pictures of MyAccelerated Motion.I only got to take a couple.

FYI, 3 monkeys were reportedly found during MHM 2010, two of which were returned to me quite the worse for wear but still with working screech! By my count, that leaves at most 2 still unaccounted for.After stumbling over them…   Read more»

As Ed said, we have a seriously difficult time tracking the club motor cases and I would vote against the club maintaining or being responsible for any altimeters in the pool.On the other hand, if you want to maintain and…   Read more»

I think it would be good to avoid the hassle of deposits or rental fees. Normal motor case rules would apply. If you can’t return it, then replace it. The replacement cost of the altimeter would be around $70-$90, depending…   Read more»

Adrian,That’s quite generous and I’m sure very appreciated by the membership (me included).I wonder if there is a way we could just maintain a loaner pool owned by Featherweight.At this year’s annual meeting in January I floated the idea of…   Read more»

I think it is a nifty idea that has some merit. For my part, as I feel I am probably nearer the end than the beginning of my rocketry career, I’d probably be a bit hesitant to rebuild rocket to…   Read more»

Very generous Adrian. If you pitch those in, I’ll provide a nice padded case to store them in. Have you or anyone in the club thought about a deposit system in case one is lost in a CATO, coresamples, goes…   Read more»

Great site for great photos every day.

I always go up 285 to highway 9 just outside of Fairplay. You then take a left and go about 9 miles or so were it ends at HW24. You will go left a little over a mile to Hartsel….   Read more»