Upscale Goblin

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John_461

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With Halloween coming up, I thought it would be the perfect time to build another Goblin or two. But since I can’t leave well enough alone, I upscale mine to a bt-60 air frame, a stock Estes nose cone, and 1/8 ply fins and rings on a 29mm motor mount.

She’ll get a couple of shakedown flights this weekend on an F23fj and maybe a G77r. Then the fun starts. I’m thinking a G138t is in her future. OR sims it to mach 1.25 and 3800’

Recovery will be a 16” nylon parachute and a chute release to make sure it comes down in this time zone. 31F49070-A7B6-45C3-ACF1-CB7BB007D804.jpeg
 

Arsenal78

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I wouldn't push it past an F. While the fins will hold, Estes BT60 is quite flimsy and will have a very high chance of crumpling. I would've suggested doing it out of LOC tubing if you wanted to punch it.
 

John_461

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This little guy only weighs 4.9 oz, and only has 5" of body tube that isn't re-enforced by either the motor mount or the nose cone shoulder. Even at 55G's, we're only talking about a maximum 8 pounds of vertical pressure. My only real concern is the shock wave created by the nose cone as it breaks the sound barrier buckling the body tube.
 

John_461

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She flew Saturday on a F23FJ. Nice flight, but it broke the rubber band on my ChuteRelease and it took a while to come down. Luckily there wasn’t any wind and it only landed 200yrds away.

 

Tyler P

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She flew Saturday on a F23FJ. Nice flight, but it broke the rubber band on my ChuteRelease and it took a while to come down. Luckily there wasn’t any wind and it only landed 200yrds away.

I saw your rocket posted on facebook! Looks really nice! A nice flight, too!
 

Bruiser

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Well I missed the boat on having a Goblin built to fly this Halloween but I think I will have to start building one for next Halloween. I think I will do an upscale too maybe with a Pro Series 2" tube and nose cone.

Anyway, is there a rocket I need to have built for a launch on Christmas?

BTW, I dig the color scheme. What did you use on the body?

-Bob
 

John_461

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1/8" ply non-fiberglassed fins going supersonic? I don't think that's going to work. If I was RSO and that came to the table, I'd definitely say "No!"
I've taken minimum diameter rockets with balsa fins supersonic on a few occasions without issue.
 

Rocketjunkie

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Unfortunately, the Hobgoblin is not a Goblin and neither is the lil Goblin from Madcow. I don't see any current kits between the original and the 4". I expect LOC would kit one up if you called and asked.
 
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