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  #41  
Old 11-06-2006, 02:36 PM
Eagle3 Eagle3 is offline
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I'm building my L2 upscale Coldpower Convertible Marauder fins like this except I'm also laminating the balsa skins with card stock.

Doug, are you staging your Avenger? If so, how are you doing it?
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  #42  
Old 11-06-2006, 03:02 PM
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Quote:
Originally Posted by Eagle3
I'm building my L2 upscale Coldpower Convertible Marauder fins like this except I'm also laminating the balsa skins with card stock.

Doug, are you staging your Avenger? If so, how are you doing it?
No, that's a faux booster. This rocket is my hybrid bird, designed to accomomdate the Sky Ripper 38's. The longest motor case just barely fits in the fin can, extending forward 2" into the coupler! (at the black/white chex).

Doug
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  #43  
Old 11-06-2006, 03:08 PM
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Sweet... gotta love those skyrippers. I'm working on converting some of my old 2.6" birds to fly on my SRS 29mm.


Back to the topic (since I helped derail it ) the one thing stopping me from building a Nike Herc is the booster transition. Hopefully you can figure a way to duplicate those easily Sandman.
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  #44  
Old 11-06-2006, 03:56 PM
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Quote:
Originally Posted by Eagle3
I'm building my L2 upscale Coldpower Convertible Marauder fins like this except I'm also laminating the balsa skins with card stock.

Doug, are you staging your Avenger? If so, how are you doing it?
No, that's a faux booster. This rocket is my hybrid bird, designed to accomomdate the Sky Ripper 38's. The longest motor case just barely fits in the fin can, extending forward 2" into the coupler! (at the black/white chex).

Doug
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  #45  
Old 11-06-2006, 04:38 PM
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Quote:
Originally Posted by sandman
Well, it's come up a few times already so it looks like I may have to make a vacuform machine.

Dave Miller of Sirius Rocketry can give you some good info on making your own vac-form machine. He did a demonstration of this at NARCON here a couple years ago.
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  #46  
Old 11-06-2006, 08:43 PM
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ok I'm in on this kit also !

I would be comfortable with a cardstock transition.
and built up fins (cardstock over a balsa frame).

they can be hardened with ca if need be, heck the big saturn or 1-b didn't have mouldings and vacuform fins. (thank goodness)
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  #47  
Old 11-06-2006, 09:10 PM
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Quote:
Originally Posted by ScaleNut
ok I'm in on this kit also !

I would be comfortable with a cardstock transition.
and built up fins (cardstock over a balsa frame).

they can be hardened with ca if need be, heck the big saturn or 1-b didn't have mouldings and vacuform fins. (thank goodness)
I really don't like vacuform parts (main reason it's taken all year to almost finish a U.S.S. Atlantis Refit).

I would go for the built up fins also. You could substitute 1/64" plywood for the cardstock if you felt it was necessary.
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  #48  
Old 11-07-2006, 07:52 AM
Eagle3 Eagle3 is offline
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Quote:
Originally Posted by ScaleNut

I would be comfortable with a cardstock transition.


Isn't that the way it's done in the Apogee Nike Ajax plan pak? I have the plans, but can't check right now. IIRC it looked pretty easy to make.
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  #49  
Old 11-07-2006, 12:47 PM
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The transition is the real "stubling block" on this project. And this is a large model at 37" long so a solid transition may be the best way to go.

I just stopped today at the VFW post in Brown City, Michigan, they have a Nike Ajax out front, and I got some real important insite to what I have to do.

The details on that one are different...simpler...so that may be a later model.

BTW the pictures in the Doffler collection show rows of rivets on the rear fins. Well this one didn't have rivets...the leading and trailing edges looked like they were folded over and tack welded!

Much easier to model! And a the central backet for the booster fins was...simpler.

The only part that had a lot of rivets was the transition.

I'm thinking of balsa covered with cardstock may work out the best with all the detail stuff printed on the cardstock.
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  #50  
Old 11-07-2006, 01:52 PM
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Quote:
Originally Posted by Eagle3
Isn't that the way it's done in the Apogee Nike Ajax plan pak? I have the plans, but can't check right now. IIRC it looked pretty easy to make.
I was wondering the same thing. OTOH, you still have the challenge of securely connecting the booster section(s) to the forward section. IE, there has to be some sort of fitting/structure behind the paper.

Doug
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