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- Jan 11, 2013
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Glad you like it. It's a one time thing...I learned a lot printing them, and by the third try I had it right
That's truly very nice of you Bill..........
Teddy
Glad you like it. It's a one time thing...I learned a lot printing them, and by the third try I had it right
That's truly very nice of you Bill..........
Teddy
Those guides are very awesome, love the font! I've been 3-D printing stuff with my high schools new 3-D printer, and putting text on the objects is always really fun and cool looking. Its something unique to 3-d printing in that it can be done without much added cost or time.
Nate, its looking great so far! If its ready by februarys launch, I'll be sure to have my GoPro film those new rail guides in action, I'm quite curious to see how they perform.
Rail guides are in the mail. I'll send some instructions in the next day or two
Got some work done yesterday and this morning.
First, like I said, I got the last fin on. Yay!!
View attachment 253085View attachment 253086
The method of using the 720 case in the tube to keep the epoxy from seeping in worked perfectly. The parchment paper never stuck, there was really no sanding needed, and the cases fit great!
I also made up a nosecone bulkhead. I've really been thinking about trying to put the tracker in the NC, but without a threaded tip, I decided it just wasn't worth the extra weight and effort to try to come up with a workable way. I thought about foaming the cone, cutting out a section for the tracker, installing threaded inserts in the foam, and then making a bulkhead that would have holes drilled to mount into those threaded inserts, but decided, after doing a couple test fits with an, ahm, stand-in tracker, decided it was easier to just tape it to the shock cord, as Chuck describes here: https://www.rocketryforum.com/showthread.php?57788-Mounting-a-Tracker-to-Your-Shock-Cord That's not the same tracker I'm using, but I think I'll be able to figure out a way to make it work.
Here's the bulkhead: View attachment 253087
I have a nut tied onto the backside, so that it won't pull through. This will be epoxied as far up into the nosecone as I can get it, so as to give me as much room as practically possible to pack the tracker, parachute, etc.
I also cut some kevlar, and mocked up my main parachute setup. There's 10 ft. of 1/8" tubular kevlar, stand in tracker (1"X2" piece of plywood duct taped to cord)
View attachment 253088
I'm thinking I'll go with the 15" chute. I'm looking or opinions on thin mill vs. regular. If this thing is falling fast on a streamer, will the thin mill hold up?
Nate
Im going with an 18" thin mill that will be deployed at the 20,000ft apogee and fall like a streamer with a cable utter which will open up at 300-500'. I think you'll be fine
Nate, thats coming along awesome! I love how min. diameter rockets go together so easy - just glue on the fins, set up your dual deploy system, and you're ready to go!
As for the chute, the thin-mil is probably fine. (my BH38 I think is using a 24'' thin mil, I'm not 100% sure though, it was the parachute included in the kit). I would just go with with whatever fits - if you can fit the regular, it can't hurt to have a bit more strength.
nothing fancy, I just suck at explaining things.
Progress!
I epoxied in the NC bulkhead- no pics because it's rather difficult to take a picture inside of a 38mm black NC...
I also received the rail guides today! Thank you Bill!! These things are truly awesome. I don't have a rail to play with, but I can tell they should work awesomely. There is really very little force on the guides when they are closed. like Bill said, you kinda have to feel them in your hand to understand how it works. once they start to open though, there's plenty of force pulling them open. The hinge works perfectly, and the fit on the tube is near impeccable.
Pics. View attachment 253403View attachment 253404View attachment 253405View attachment 253406View attachment 253407View attachment 253408
In the one picture, they're fitted onto a Formula 38, since Redshift is getting fillets.
Needless to say, I also started on fillets.
I'm using Rocketpoxy tinted black and a 29mm motor tube to pull them. Yes, they're rather large. With no tip to tip or other FG reinforcement, I figured I'd try to keep the fins on with fillets.
Pics: View attachment 253409View attachment 253410
They look better in real life, the pictures are a bit misleading.
Nate
Haha I'm doing the same with my mach 2 38mm md build, no T2T but I'm going to make huge JB Weld fillets to hold the fins on.
Jb weld is heat resistant...but not that strong.
Ive talked to a bunch of high performance md flyers and they have all said JB Weld will work fine. Sure it may not be as strong as something like rocketpoxy or proline but it gets the job done just fine
Ive talked to a bunch of high performance md flyers and they have all said JB Weld will work fine. Sure it may not be as strong as something like rocketpoxy or proline but it gets the job done just fine
JB weld is good to mach 2.2+ with MUCH MUCH smaller fillets than you used. If your prep was good you will have zero issues.
Ya I may need to rethink what epoxy I use for fillets.... The rocket is simming to mach 2.4 and I'd rather be safe then sorry. Maybe rocketpoxy? Sorry to derail your thread Nate
Ya I may need to rethink what epoxy I use for fillets.... The rocket is simming to mach 2.4 and I'd rather be safe then sorry. Maybe rocketpoxy? Sorry to derail your thread Nate
Nate, thats coming along awesome! I love how min. diameter rockets go together so easy - just glue on the fins, set up your dual deploy system, and you're ready to go!
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