And I learned that rolling your own thin tube around a 2.6" BT is exactly the right diameter for an outside layer of regular 8.5" paper
What did you do rocket wise today?
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Charles_McG
Ciderwright
Test flew my finless Recruit sounding rocket. Eggfinder Mini and Quark on board, so plenty nose heavy. D12-5 on a still day. The vents I put into the payload above the avbay didn’t work - the Quark didn’t detect launch. I’ll have to improve that. Picked up some scratches, but ready to try staged - when we can fly HPR again.
o1d_dude
'I battle gravity'
Straightened the Cherokee-H fins and test fit the motor mount into the slotted tube. It turns out the centering ring are are slightly undersized in the tube. The char on the laser cut rings tells me I didn’t sand them down.
Thinking about adding a coat or two of epoxy to the edges to increase the diameter of the rings and them sand them down to fit the tube. I will be adding fillets to top centering ring in the tube and to the rear center ring so that should be sufficient to anchor the assembly in place. Then of course the fin fillets will add additional strength as well.
Thinking about adding a coat or two of epoxy to the edges to increase the diameter of the rings and them sand them down to fit the tube. I will be adding fillets to top centering ring in the tube and to the rear center ring so that should be sufficient to anchor the assembly in place. Then of course the fin fillets will add additional strength as well.
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Jay Dub 4009
Well-Known Member
Worked on LOC 2.6” Amraam avionics bay. First off drilled all the bulkheads for doghouse integrated charge wells and sanded. Primed bulkheads. Installed OBH welded eyebolts. Installed charge wells. Installed threaded rod with self sealing washers and self locking nylon nuts. Installed nylon clamps onto the sled. Installed labrat pull pin switch kit. First time using one of these and I really enjoy it. No more Schurter switches or screw switches again. Installed standoffs for a quantum, allowing for enough hight for pull pin to clear. Fabbed a battery harness solution for the switch/altimeter connections. Used one male and one female jst rcy harnesses, and soldered each harness’s red wire to outside terminal of the omron switch. Cut the black wire to match length to joint together, stripped and then soldered together. Decided I that it’s not clean enough, and then got on digi key and ordered jst rcy pins and connectors so I can run the black wire from each side of the harness into each other. Connected everything up to a 2s Lipo that will be zip tied on the bottom, pulled the pin and the quantum fired right up! Love this switch. Then I finished by fabbing the charge well harnesses and installed on the charge wells. Dry fit it all together and I called it done.next I sanded the second primer coat on the booster and payload tubes, quick wipe of alcohol and let dry. Installed a new box fan on my primitive paint booth because I did something stupid to kill the last one. Sprayed a light last coat of primer on the booster and payload tube.
Downloaded Rocksim 9 from Apogee to give it a test drive. Installing was easy.
A bit quirky and not entirely intuitive until I understood their methodology for designing a rocket. Input most of a design previously done in TurboCAD.
It was going well until I tried adding strap on pods. No matter what I tried it kept putting the booster INSIDE the sustainer. Which part of "strap on" pod did it not understand?
A bit quirky and not entirely intuitive until I understood their methodology for designing a rocket. Input most of a design previously done in TurboCAD.
It was going well until I tried adding strap on pods. No matter what I tried it kept putting the booster INSIDE the sustainer. Which part of "strap on" pod did it not understand?
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OK, decided I need to stop yammering on other threads and actually show something I am doing rocketry. Bear with me, I am not the speediest builder (got other things I have to do), but here's what I've been doing the last couple of weeks. Madcow Squat build. Plan to put it up on a J after I try a 54mm soda can motor. Trying not to overbuild to much but using epoxy. Some pics, and no I don't try to sand all the primer off. If it's smooth, I'm happy. 
I am putting a GPS and altimeter in the nose cone. Pics to follow, but you may notice the cone stands up. Basically doing a J. Coker mod on the nose.
I am putting a GPS and altimeter in the nose cone. Pics to follow, but you may notice the cone stands up. Basically doing a J. Coker mod on the nose.Attachments
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Oh, BTW. For the less experienced. Don't use acetone to clean up sanding dust if you use Bondo Glazing and Spot Putty. First time I tried this. It makes the putty disappear rather nicely.OK, decided I need to stop yammering on other threads and actually show something I am doing rocketry. Bear with me, I am not the speediest builder (got other things I have to do), but here's what I've been doing the last couple of weeks. Madcow Squat build. Plan to put it up on a J after I try a 54mm soda can motor. Trying not to overbuild to much but using epoxy. Some pics, and no I don't try to sand all the primer off. If it's smooth, I'm happy.
Learn something new every day if you pay attention.
o1d_dude
'I battle gravity'
Good luck getting the paint to stay on the nose cone. Not sure what kind of material it's made of but I finally had to use some automotive adhesion promoter in a spray can (bumper primer) to get the paint to stick. And every time I fly my "Skwat" there are two things that I can count on happening: 1. It will find the smallest body of water on the field and land in it. 2. There will be some sort of paint problem with the nose cone...generally a fingernail sized chip somewhere is missing. I've re-painted the nose cone several times and the colors no longer match. Grrr.
I now know why you see so many Squats with unpainted white nose cones.
It does get out of Dodge in a hurry on a big motor, tho.
PS. I had to add lead shot mixed with epoxy inside the nose cone with bamboo skewers driven through the walls to keep the ballast in place. That has worked well.
I now know why you see so many Squats with unpainted white nose cones.
It does get out of Dodge in a hurry on a big motor, tho.
PS. I had to add lead shot mixed with epoxy inside the nose cone with bamboo skewers driven through the walls to keep the ballast in place. That has worked well.
tOD
Sinking in the quicksand of HPR
Would that be a bus with fully factory air conditioned factory air from our fully air conditioned factory?
JCRL
Well-Known Member
Continued progress on my scratchbuilt flight computer
Hey Old Dude, I have had great luck using Rusty 2x ultra cover that sticks to plastic. Have used it on plastic NC many times. Might give that a try.
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Planned on using adhesion promoter, have some from another project. Also plan to do nose weight that way. Have to get all the other parts built so I know how much to use.
@Alan R You've given a whole new meaning to rolled my own.
I always feel like I need to roll another one...
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"Just like the other one."I always feel like I need to roll another one...
Edit: ancient history musical ref.
one in the morning, one in the evening...(more song lyrics)
Don't Bogart it.
Pass it over to me
Nike Smoke
Nose Cone: What do you think? Paint or not? What about the seams?
Primed fins after 3 coats of CWF. They look real good. I feel like I am getting better at this. A couple of tips were helpful, sand lightly and sand most of the CWF off.
Nose Cone: What do you think? Paint or not? What about the seams?
Primed fins after 3 coats of CWF. They look real good. I feel like I am getting better at this. A couple of tips were helpful, sand lightly and sand most of the CWF off.
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Finally got to launch my dual deploy Loc Athena this weekend, would have worked perfectly if i had not trusted the plastic loop on the nose cone. i guess that's
why they call it a learning curve.....
why they call it a learning curve.....
Ralph M Bohm
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Wellllll, I have my beautiful bride stop all work in cooking and baking and instead, sort resistors into freshly-printed drawers for 3D-printed boxes to hold them for use in future rockets and current MLP build as part of the electronics for the 1/100th scale Saturn V and other undisclosed launch vehicles. Hooo boy! I'm so far behind.
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Ralph M Bohm
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WOw! Beautiful background! Where is that pic taken?
Ralph M Bohm
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I see what looks like a BMP280, a temp/humidity sensor but what's that just above those 2?
Beautiful bird
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Im in the USVI
Urff?
Put the word “Planet” in front of it and say it out loud.
All will become clear.
LOLUrff?
Put the word “Planet” in front of it and say it out loud.
All will become clear.
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