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  #11  
Old 08-26-2019, 01:57 PM
chrism chrism is offline
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Quote:
Originally Posted by ghrocketman
I just picked up the ULTIMATE mini-brute on ebay. The 1972-73 TK-40 Midget for a whopping $39.
Gonna build it too.


Nice score GH!
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  #12  
Old 08-26-2019, 03:33 PM
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Shreadvector Shreadvector is offline
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https://www.google.com/search?q=ast...t=firefox-b-1-e




Quote:
Originally Posted by ghrocketman
The TK40 Midget is a 2-stage mini brute smaller than the Beta. It is a BT20/BT5 reduction of the Astron Midget that was BT50/BT20 based.
I can't copy the pics from ebay unfortunately.
Will take pics on 9/2 once home from Playa Mujeres.
I'm on vacation again.
Scored a 1973 skill-level last year Astron Cobra for only $100 too. That was a major bargain worth at least $250.
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  #13  
Old 08-26-2019, 03:39 PM
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Jerry Irvine Jerry Irvine is offline
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The Luna Bug has air brakes on the rear to reduce altitude performance.

http://forums.rocketshoppe.com/atta...achmentid=52744

We have a rocket we did that to to drop it from a balloon so it doesn't enter at Mach 5.



Tech Jerry
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Exemptions not regulations. Please support DOT treating slow burning solids as not subject to HMR. 2015 NAR President declines!
U.S. Rockets instaship. http://bit.ly/1aca7mA Please buy some rockets.
The O administration believed in tax, spend, borrow, fine, mandate, monologue. D voters will soon be very happy with the election outcome!
Model rocketry is as safe as safe can be defined in human existence. Bow and pray: GH Stine, Orville, Vern, Lee, Lonnie, Carl, etc. No, really.
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  #14  
Old 08-26-2019, 04:15 PM
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mojo1986 mojo1986 is offline
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GH, I'll save you the trouble............
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  #16  
Old 08-26-2019, 06:36 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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All the Midgets I launched used short motors. What is this mini-brute they speak of?
__________________
Exemptions not regulations. Please support DOT treating slow burning solids as not subject to HMR. 2015 NAR President declines!
U.S. Rockets instaship. http://bit.ly/1aca7mA Please buy some rockets.
The O administration believed in tax, spend, borrow, fine, mandate, monologue. D voters will soon be very happy with the election outcome!
Model rocketry is as safe as safe can be defined in human existence. Bow and pray: GH Stine, Orville, Vern, Lee, Lonnie, Carl, etc. No, really.
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  #17  
Old 09-02-2019, 09:52 AM
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5x7 5x7 is offline
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Putting back a valuable post lost from this thread:

Bill S has just replied to a thread you have subscribed to:
***************
We painted ours neon green, and frankly, in grass that is 8-10" tall, you can't see the rocket until you are right on top of it. I was thinking florescent orange, but my son is resisting that idea. We only used 1/2A engines, and that rocket was hard enough to see up there in the sky, let alone see where it fell to. NO WAY are we putting in an A10 engine in that thing.
***************
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  #18  
Old 09-02-2019, 10:18 AM
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5x7 5x7 is offline
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I flew the Luna bug three times on Friday at the edge of a newly mowed soccer field. First flight was MicroMaxx in an adapter, went much faster and higher than I thought it would, ejected going up, and, streamlined in but not too fast, landing pad drag I guess, and didn’t bury itself. It landed three feet from me right next to the bleachers. Next I tried a 10 year old 1/4A3-3, I angled the rod a little more and it went higher,but the thick tracking smoke made it easy to follow, and was easy to see the rocket at ejection (clear skies sun low in the sky). A moment after ejection I heard a ‘pingggg’ as the ejected motor hit the bleachers two feet from me, so I recovered the motor and rocket. Third flight was another 1/4A from the same pack. After liftoff the Luna Bug turned sideways at 10 feet, burned out and tumbled it’s way to a low apogee, then started tumbling toward the ground when it ejected at 20 feet, so the rocket and motor were just 25 feet from the launcher. It looked like the motor nozzle, which was the white fine poopy clay, had ejected part of the throat, effectively making the nozzle larger and offset to one side, vectoring the thrust. Overall, this is a nice little rocket.

MM flight. Keep an eye on the upper left after the pop:
https://youtu.be/rGj8nBA3Ztw

A3T Cato:
https://youtu.be/6h2mJCS14lA
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Last edited by 5x7 : 09-02-2019 at 08:21 PM.
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