YES! I'm very impressed that someone knew this right away about band saw repair. It earns machine shop cred in my book!
What did you do rocket wise today?
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rharshberger
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As the owner of 3 bandsaws (not all at once) and one needed "restoration" after having been stored outdoors (under a tarp) for years, learned a lot about them and repairing them.YES! I'm very impressed that someone knew this right away about band saw repair. It earns machine shop cred in my book!
Added to my Semroc collection.
I got some more foam board. I'll laminate it onto what I have already done. I'm putting the space plane on the back burner for now. I bought a small and medium Christmas trees. I'm going to make rockets out of them. I need to be done by Friday. Our December launch is Saturday. Forecast is for 35 to 45 degrees and a 5mph breeze. Cold I don't mind. Wind I hate. I resurfaced my work bench. I took a sheet of 1/4" ply I had stained for the cat tree. At Home Depot I bought a roll of heavy paper. Turns out what I thought was heavy Craft wrap is Trimac X-Board. It has spill block. Who knew. It's 1/32" thick. Hopefully it will keep my new top looking good for a while.
The small tree fits almost exactly on a 1.63" BT. I'll take a coupler and but a bulkhead on both ends the epoxy the tree on. Like a nose cone. The bigger tree is 32" tall. The tree will be the fins/base drag. How to do it, I don't know yet. I'll have to decide whether to use tractor motors or a traditional set up. The small one will be ready to paint tomorrow.
The small tree fits almost exactly on a 1.63" BT. I'll take a coupler and but a bulkhead on both ends the epoxy the tree on. Like a nose cone. The bigger tree is 32" tall. The tree will be the fins/base drag. How to do it, I don't know yet. I'll have to decide whether to use tractor motors or a traditional set up. The small one will be ready to paint tomorrow.
Sooner Boomer
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Come fix mine now. I tried to use it a couple of years ago, and the top nylon tire exploded. It was in the middle of the winter so the cold might have had an effect. I used to use it all the time, esp. for cutting fins. Now I gang them together and saw them out with a hand saw. If the belt sander ever goes, I'll be in big trouble. How did I ever build rockets as a kid without power tools?
berlinetta
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I haven't done much in the last few days. However, last night I expoxied the third of four t-nuts into my 3" avbay for my LOC Black Brant X.
What you described was what had happened to mine. Years ago the blade broke while I was using it...scared the heck out of me and I got a new blade, but then stopped rocketry for a bunch of years.
This Sunday, I finally went to put the blade in place, the urethane tires/collars had hardened and broken apart on their own...just crumbling as I was removing it.
I figured it'd be a chore to find replacements, but I just Googled it for my model (I had the label in my hand because that also fell off from age lol) and Amazon had a number of replacements under $20!
I read some reviews and one mentioned warming them so that they a stretch on more easily...definitely! I used almost boiling water and let it sit for about 15 minutes and it was a snap. Before that, my water wasn't hot enough/basement was too cold and it just wouldn't go, so I removed the wheels so I could do it in my warmer living room.
If you need any help, just ask me or @rharshberger !
Smaller and slower, probably. And maybe not as well.
Upside of going into the office occasionally; the really nice color laser printers work great with laser decal paper
more sanding on the old Mig-31. All that flat balsa is killing me. I wonder if it would work to find someone with a blast cabinet using plastic beads or another mild abrasive?
Balsa in a blast cabinet? Test On Scrap First!
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Finished up a mini fat boy, it’s what I had ready for paint, btw ace hardware paint is pretty decent
Find some one with a soda blaster. I have a small hand unit. It removes and preps paint with the minimum possible surface damage. Try a test swatch first.
lakeroadster
When in doubt... build hell-for-stout!
twice the big balsa fins have cracked/broken. 
Have I mentioned today how much I hate cheap, primitive, weak balsa? I'll never build anything with it.
Have I mentioned today how much I hate cheap, primitive, weak balsa? I'll never build anything with it.
Doug Holverson
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Printing out home brew Bowden clips. Shaped, sanded, and glued together the tail for a Legelegel.
How would you make that static mixer? Wood bending? 3D print?
lakeroadster
When in doubt... build hell-for-stout!
Aluminum would be the easiest, and to me, it doesn't violate NAR specifications since it's not a part of the airframe.
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I went to my local Auto paint shop to see what they recommended for an Apogee Zephyr nose cone, explained what I was trying to achieve etc, and they recommended using an adhesion promoter, and then also suggested SEM Color Coat paint - designed for rigid plastics, vinyl etc.
You can still scratch the paint, but it does not just peel or flake off, so I use it on all of my larger nose cones...
SEM is high quality, but $22 for a can of their hi-build primer is expensive.
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I've been using Bulldog adhesion promoter. It's worked OK, but it seems to add a little drying time. I'll have to get some of that to try ^^^ if I run across it.
My best looking nose cones are usually the ones where the paint falls off or chips early. These tend to get a pretty vigorous treatment with solvent, sanding, and scraping to remove the paint and resurface the nose. They look pretty rough before repainting.
More work on my custom fin jig. Getting there...still need two more features.
Looks cool! Is there another, forward, ring?
Thanks and no forward ring. However I'm planning on adding another block of wood in the middle that can pivot and serves as an adjustable standoff as well as spacer bracer. On the aft end I plan to add a thin metal rid to serve as an indicator that the fin is straight up.
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How in the heck do you use a bandsaw to make something circular without binding up the blade?
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Kilz is is not enamel is it? Is it compatible with most enamel rattle cans?
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Took parts for my current build (which is over optimum weight and due to its geometry needs a lot of nose weight) into the machine shop after work and hacked material off them. 7.6 grams off the all-up weight. In OR sim, apogee gains 60 ft with a C11-5 and 50 ft with a D12-7.
You could with a jig, but I actually used it to cut the slots in the CR that I already had.
rharshberger
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Bandsaws have blades of varying width, use a narrow blade for tighter turns/circles and the wider blades for straight/resaw cuts, each blade width is a compromise between manueverability and stiffness....then there are the different tooth patterns/designs.
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