Colossus Goblin

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chris m

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I have a colossus goblin I'm starting to build if you want a build thread I can do that .
Spec 4 inch air frame loc and cone
Four 1/4 inch fins was set to apply to frame will do though the wall
54mm hole . Only thing I am changing is the fins through the wall and the motor mount .
Things working on now is will the fins need to be re cut due to not just going on the air frame , losing about an inch waiting to sim this . And DD this being 46 inchs tall 4 grain cti would be the max length
 

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chris m

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In OR with .50lbs of nose weight is over mach , but I will be glassing the air frame and fins then do T2T
 

chris m

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Air frame and fins have one layer of 6oz glass on them . Wow I'm rusty pictures when I get the frame cleaned up , used wax paper as top wrap worked well but had a few dry spots that I didn't see
 

chris m

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Hello well got my weights and a mock up and ran everything through OR this is just the starting point here is the sim file if any one wants to look at this . like always this is in process and things can and will change .View attachment usr_colossus_goblin.rkt
 

K'Tesh

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I want a build thread... :pop:
 

REK

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Chris how about a picture of that glassed tube :D.


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chris m

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I will have the build thread and more pictures soon
 

AHansom

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Looking forward to seeing more build thread pics. The fins on mine are 1/8" laminated Baltic Birch with a layer of 6oz. cloth on both sides, then through the wall mounting without tip2tip glassing. I have flown this 4" Goblin on 54mm J's a few times using motor deploy with no problems. I was kind of worried about fin flutter but it doesn't seem to be a problem. The video is of a J-250 flight and the fins look pretty solid. When it came time to finish it Mark at Sticker Shock did a awesome set of decals for it.

https://www.youtube.com/watch?v=EZ7K0m-KhLA

goblin.jpg


DSCN1335.jpg
 

chris m

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Yes I'm doing the same switched for the 38mm to 54mm and the stock fins are through the wall one wrap on the frame and same on the fins . I will have some pictures later today
 

chris m

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Here is some pictures , I'm rusty and have not built in some years. There is some filling to do. This is a mock up no adhesive was in harm

1489008264707-1130361350.jpg


1489008304890571110719.jpg


1489008347460-311748477.jpg


1489008381221-183982315.jpg


14890084219421323917165.jpg
 

chris m

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Don't know why all the pictures are upside down
 

chris m

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Thanks catching up on a few build threads today . I'M bad at documenting ,but need to get better .
 

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Now was that so hard lol sorry lad just busting your chops. Looks good my man, keep up the good work.


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chris m

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All my mistakes from glassing the tube and fins have been cleaned up pictures in the morning. And the adapters I think are done as well .
 

Coop

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Nice! I L2'd on a Goblin upscale Goblin Liftoff.jpg

I popped a QRS-24 streamer at apogee because, well.... it's a Goblin, right?


Later!

--Coop
 

REK

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Coop that is a beauty, Chris I cant wait to see it finished :).


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Coop

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Thanks! I always thought the Goblin was a fantastic rocket--and like Chris and others, thought it would do well as an upscale. Also like Chris, I wanted to do a 4" /54mm, but unlike him I never got around to it. Heh.

Looking forward to more build photos!

Later!

--Coop
 

UPscaler

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I was beginning to wonder if you were still around! Looks like a fun build, I had planned on a big Goblin some time ago but it never came into fruition. I do have a Performance Hobbies 6" Der Red Max to build, though!

Can't wait to see this done!

Braden
 

chris m

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Thanks I was away for a few years . This is a US Rockets kits that I had for a few years . Started life as a 29mm . Then thought to go to 38mm , then coming back thinking do it right as 54mm
 

chris m

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Pictures later today may not be painted till after first flight
 

chris m

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14933048797621650378228.jpg It's done for the time being . I will strip down the air frame and fill all the low spots due to the not very good glass job I did and it's at 3.41 lbs so it could take any 54mm may build a donut av Bay. To go large k or L motor the fins or glassed and fillers at 6 points .
 

REK

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Sweet good job chris


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rockets

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Chris, you HAVE to fly it on a Loki Spitfire motor. For some reason Spitfire motors look good in Goblins! :p BTW, the rocket looks AWESOME! You need to teach me a lesson on how to get a good finish on that thing!:jaw:
Thanks,
 

qquake2k

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That looks great, Chris! (I couldn't resist editing the photo.)

Goblin.jpg
 

chris m

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Thanks but there is high spots and lows from the glass job . Will need to strip it down and clean it up and get a good paint on this .
 
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