Thanks Tom. I already have a ring cutting fig for wood rings that works great. http://mbrocketry.com/projects/tools/rocket_tools/ring_cut/centjig.html. My...
Circle cutter and a carbide router bit. I have used the same bit for 1/8" G10 fins and using it with a circle cutting attachment shouldn't be any harder to do....
hey all you lathe studs...I have a question and maybe a favor to ask. I am building a 2.54" CF rocket that is just a little off-standard with its dimensions....
... maybe not the precision you imagined, can you get close enough by turning down styrofoam in a drill press? glue a 3/8" dowel in the center of a 3x3 chunk...
TK; I will trade you a plug for your mold for a finished CF nosecone when you get then into production. You didn't say but did you need a conical or an ojive...
I use a Dremel High speed circular saw with a carbide bit c/w homemade circular cutting jig. To cool the bit and the G10 I use a can of evaporative cooling...
Is kevlar RF safe? Is it a good material to use for nose cones? What would you recommend making a cone out of that is RF safe and pretty sturdy (high mach 1,...
sounds fair. it is a weighted parabolic profile. I have all of the dimensions, plus the plot for the curve if you want to see it. I think I have your number,...
I believe it is . I have a 3 inch Kevlar nose cone that Ken M made it it works great with a tracking device. I would recommend that you test as well once the...
Jordan, Not really a practical suggestion to your question, but it brings up an idea I have had tickling around for some time--that of ceramic nose cones....
I know that there are people (on this group even) who fly plain fiberglass nosecones well over mach 2 (I believe even mach 3) without any problems. Jim Jarvis...
... idea I have had tickling around for >some time--that of ceramic nose cones. Ceramics are not a subject that gets discussed much here, but >have some pretty...
Greg, I think you're right when it comes to run of the mill clay and porcelain, which is what I'd use initially, but there are other ceramics out there which...
I will take a few shots and post them shortly. The Dremel Advantage is a very good and cost effective all around tool for rocketry. The cutting accuracy comes...
Our group did testing a while back for Atha Altus project. Our airframe was all carbon so we did some testing, just to see, what the issues would be. Lower...
My own experience with Kevlar is limited, but it matches well with what I keep hearing others say; it's great for what it's good for, which is adding toughness...
Hello All, I'm getting ready to build a super high performance 54mm min dia bird and curious if there is a tried & true method of fin attachment. Airframe:...
... bird and ... length ... area. The ... front ... the length ... but I've ... small ... peel back ... Peter, I'd be happy to give you my $0.02 worth. The...
Thanks Jim! And now for the follow-up questions... For the t-t carbon, do you just run the carbon past the fin edge, so you're actually sealing the fin in a...
... so you're ... I think a carbon sandwich is a good way to put it. That, plus a large radius plus a solid tube gives a good, strong result. ... the t-t ... ...
Hi Peter, In my opinion, epoxy is stronger than the bonded materials as long as there is a good surface bite. That said, I believe it more important to build ...
it can be used for a finish layer, just make sure that layer is perfect how you want it to be to make it perfect, put it as the first layer inside the cone...
According to JB Weld specifications it claims a tensile strength of only 3960 psi, while Cotronics 4525 claims a tensile strength of 10,000 psi. JB Weld...
Re: [CompositeRockets] Re: Attaching Mach-proof fins Peter, Now for some way out advice--assuming the g-10 is wrapped completely with couple layers of CF,...
For a 54mm rocket all you need is 1/16" G10 as the core material. my 54mm bird has gotten close to mach 2 on a K1100 and the fins where 1/16" G10, surface...
With all due respect, Jordan, depends to a great extent on the fin design and dimensions. Now assuming that this is a high perf. design, and the span might be...
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