Going to use Bondo polyester-based FG resin to T-to-T fins. It has a heat rating up to 180 degrees, but I think I could augment the leading edges with JB Weld for a little more protection. I've used it before and it holds incredibly well. Of course I haven't taxed the heat resistance as much.
Going to use Bondo polyester-based FG resin to T-to-T fins. It has a heat rating up to 180 degrees, but I think I could augment the leading edges with JB Weld for a little more protection. I've used it before and it holds incredibly well. Of course I haven't taxed the heat resistance as much.
Majority on here would recommend epoxy. I have not used polyester, but I have heard its inferior to epoxy. I would also recommend it.
That was not what the math was telling me. More work, but a greater chance of success.
All three epoxies had a long curing process (about the same time each) so they all cured about the same time. They all also had 1:1 mix ratios.
I know that you can mix some epoxies together without any real problems. That is sometimes how you can speed up curing of G-flex for example. The chemical reaction process is largely the same.
The end result is that everything seems to be very strong...much stronger than before the tip-to-tip. We'll see when it flies. I am going to add more rocketpoxy to the fillets because right now they are fairly small. I am going to be sanding tonight and tomorrow, then applying fillets one more time afterward. More photos after I finish sanding.
I am going to add more rocketpoxy to the fillets because right now they are fairly small. I am going to be sanding tonight and tomorrow, then applying fillets one more time afterward. More photos after I finish sanding.
If these do flutter, at least under thrust they will punch through transonic in less than half a second. Coming out of Mach they will be transonic for about 2 seconds and that could be an issue.
I tend to pack my rockets fairly tight. No reason for wasted space.
Not sure I understand, though, are you saying that you are getting 75mm3G motors for less than 54mm6G ones?
Love it! My Nuke Pro with a 38mm5G and full electronics feels like a little brick.
Old timers are well aware of this....lots of comparisons in the motor world reveal better value for flying larger motors cheaper. This is one of the best.
He's figured it out.:grin:
I had a Nuke Pro Maxx and certified L2 with it with a J270. 8,458' up. It landed a mile and a half away. So I took it to LDRS 31. I upped the ante with a CTI J530. The sims showed 13,000' and Mach 1.5. At 3,700' just about peak speed, it crushed like a beer can. Pieces rained all over the range. It was glorious.
blackjack2564 said:2 grain 75 [133.00] which most are equal to or greater Ns than a 54 6xl [173.00]are significantly less cost.
If you got 6XL in there you must have been making even better use of your space. Consider me impressed!
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