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#11
09-19-2024, 07:42 PM
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Great project, John.
You come up with some really interesting Rocketry ideas.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, AGITATION, CHAOS, TURMOIL, FIASCOS, AGGRAVATION, INSTIGATION, NUISANCE-ACTION, and HAVOC ! 
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#12
09-19-2024, 08:26 PM
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Quote:
Thanks!
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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#13
Yesterday, 05:55 PM
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Fins and Tubes
Cut the fin templates from paper, transferred it to cardboard, then to some 1/4" plywood which was cut using a scroll saw and then sanded to shape.
I also prepped the tubes for the fins. The Lower Fins will glue to the internal C-60, the Upper Fins and Launch Lug Mount to the surface of the BT-60. Using the OpenRocket fin guide the Body was layed out for the fins. Using a circle template, 5/16" dia. circle were drawn on each of the Lower Fin locations, and a 1/4" dia. circle for the Upper Fins. Lines were then drawn for the fins from the outer extremities of the circles. It's just an easy way to lay out the tube. I used my 3/4" aluminum angle as a straight edge and then cut the slots into the tube. Elmer's School glue was used to attach the inner C-60 to the Outer BT-60.
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John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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#14
Yesterday, 05:57 PM
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Fin Attachment Using Fixture
This is the 1st rocket where I am using my fin attachment fixture to locate and attach the fins.
One thing is that while it does a great job of aligning the fin perpendicular to the rockets vertical centerline, it does nothing to orient each fin to each other. But... On a (4) fin rocket, if the spreader fixture is used in conjunction with the alignment fixture, those two fins would indeed be 180 degrees apart. And if another fixture that I can use that spaces the fin 90 degrees from each other, that should also work.
__________________
John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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#15
Yesterday, 06:03 PM
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All that being said, the fixture is pretty great. I installed all the fins in about a 3 hour time frame.
__________________
John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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#16
Today, 05:13 PM
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Nose Cone Ballast and Recovery Dowel
Ballast:
A 4" long piece of 1" steel bar stock was placed in the chuck of the wood lathe, then an angle grinder with a 1/16" thick cut off wheel was used to slice off a 1-1/2" long piece. A groove was cut in the o.d., also with the angle grinder. Recovery Dowel: This was cut via a hack saw from a piece of 3/8" steel bar, it's about 1-1/2" long also.
__________________
John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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#17
Today, 05:16 PM
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Gluing the Nose Cone and Upper Fins
The Upper Ring was Gorilla Wood Glued to the Body Tube o.d..
A piece of 300# Kevlar Shock Chord was attached to the Recovery Dowel. Two holes were punch through the Body Tube just below the upper ring. Wood Glue was applied to the face of the Upper Ring and the Nose Cone was set into place and allowed to dry for 1/2 hour. Wood Glue was injected into the two punched holes until the glue started to build up on the face of the Nose Cone Hub inside the rocket. The rocket was held upside down and spun for 45 minutes at 45 degree angle. The O.D. of the Upper Ring was wood glued to the Nose Cone. The Upper Fins and Launch Lug Support were glued to the Body Tube and to the Nose Cone.
__________________
John Simmons a.k.a. "Lakeroadster" NAR 113985 My Fleet with Build Data: Lakeroadster's Rocket Shop
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