Scotch Weld DP 460 is another to consider. I don't have the numbers in front or me but I remember it being stronger than the Hysol and having decently high Tg.
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It makes me fuming mad, knowing a fin could literally rip off well above room temperature from friction with the air, yet some people don't understand. It's a number on a sheet with a random meaningless meaning to non engineer or non engineer student until a fin rips off in flight from a thermal load./RANT
Call Aeropoxy and ask for a TG just because it is unreported does not mean they do not have it. Tell em' you want it on a rocket at Mach 2+. The poor sales person will flip out and get an engineer. It isn't superior when you have zero data for that to compare with, bud. You may get a shocker when you hear how low TG some of their products are. They wouldn't sell me an epoxy for a M1.7 application. I told them on the phone lives were on the line. And I damn well meant it, because they were literally resting on a TG value keeping a fin on and a casing bonded in a 0.3s to Mach 1.5 application 200ft away from people. They gave a list of competitors. I might be an idiot for using Cotronics 4700 on an L-1 MD multistage, but it had TG value listed and exceeded these other guys specs. Heard the 4525IP is the room temp version non oven cure. Aeropoxy is good on paper at room temperature. With Aero heating.... You don't want it. Call Aeropoxy. They will get numbers you don't want to hear. Not trying piss on Aeropoxy products. Fine AIRCRAFT glue.
First thing they want is how hot is your ROCKET going to get when its supersonic. When they don't sell you the epoxy... You realize something about how important a TG number is. Don't settle for unreported.
You wouldn't put a blowtorch (A thermal load) to a rocket motor casing with live fuel grains inserted. Why do people recommend epoxies without TG values listed that could fail if the application exceeds the value?????
As a TAP, I think this is a very bad idea. Just the certification part. I'm all for stretching the envelope, AFTER you get your cert.\
WHY?
I think it's a GREAT idea.
Learn to push the envelope - especially if you plan on doing that more than once - while leveraging the tutelage of two TAPS that are critiquing your design & preparations.
This is the PERFECT TIME - not later when you're fumbling on your own.
We all view L3's totally wrong IMHO -- it is a teaching moment - the LAST teaching moment for many. Use it!
Make SURE the candidate knows how to [safely] fly and recovery a high performance, mach-busting DD flight is my idea of a L3 flight.
This is a great choice!
The only advice I have on it is to fly the new electronics on a more comfortable flight to get used to their operation.
As a TAP, I think this is a very bad idea. Just the certification part. I'm all for stretching the envelope, AFTER you get your cert.\
WHY?
I think it's a GREAT idea.
Learn to push the envelope - especially if you plan on doing that more than once - while leveraging the tutelage of two TAPS that are critiquing your design & preparations.
This is the PERFECT TIME - not later when you're fumbling on your own.
We all view L3's totally wrong IMHO -- it is a teaching moment - the LAST teaching moment for many. Use it!
Make SURE the candidate knows how to [safely] fly and recovery a high performance, mach-busting DD flight is my idea of a L3 flight.
This is a great choice!
Thing is Fred, not everyone wants nor can do a Mach busting, high altitude L3 flight due to a variety of reasons least....
Thing is, clearly the OP has the space and desire. My point is why the heck would a TAP discourage this fine opportunity to teach???
Thing is Fred, not everyone wants nor can do a Mach busting, high altitude L3 flight due to a variety of reasons least....
Thing is, clearly the OP has the space and desire. My point is why the heck would a TAP discourage this fine opportunity to teach???
Exactly.These people are not here to impose their personal flying "style" on candidates, but to validate the candidates rocket is built within the rules and will be flown in a safe manner....and to take the opportunity to educate along the way.
Exactly.
Agreed but that doesn't mean is "has" to be a Mach screamer. Kurt
No, it doesn’t. No flyer should ever fly something they feel uncomfortable with. Learning new limits is one thing, exceeding them is yet another. A flyer may wish to increase the probability of success by flying a more sedate flight. That’s absolutely fine. I’m impressed by people who invest the time and effort to expand their knowledge and extend their limits. I’m definitely not impressed by people who fly beyond their limits while trying to impress others.
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