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  #11  
Old 06-14-2005, 01:13 AM
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Carl@Semroc Carl@Semroc is offline
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Almost all the PNC cones from Centuri are about .2 or .3 inches shorter than the original balsa ones. The ogive balsa cones were not very "mass producable" in plastic so the sharp tip was rounded, making the length shorter. They never went back and updated the kit overall lengths (or weights) on all the ones I checked that migrated from balsa to plastic nose cone.

Centuri nose cones
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  #12  
Old 06-14-2005, 01:33 AM
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Quote:
Originally Posted by Carl@Semroc
Almost all the PNC cones from Centuri are about .2 or .3 inches shorter than the original balsa ones. The ogive balsa cones were not very "mass producable" in plastic so the sharp tip was rounded, making the length shorter. They never went back and updated the kit overall lengths (or weights) on all the ones I checked that migrated from balsa to plastic nose cone.

Centuri nose cones


That makes complete sense. I forgot about the "rounded tips" on the plastic ones.

Craig...
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  #13  
Old 06-14-2005, 01:43 AM
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A Fish Named Wallyum A Fish Named Wallyum is offline
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Guess what Centuri clone just popped onto my build and review list? Do you guys have any other tricks up your sleeves?
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  #14  
Old 06-14-2005, 02:13 AM
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Quote:
Originally Posted by A Fish Named Wallyum
Guess what Centuri clone just popped onto my build and review list? Do you guys have any other tricks up your sleeves?


Laser cut fin sets are now available. (Bill and Jay... the 137% upscales are also available) Ask Sheryl.
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  #15  
Old 06-14-2005, 08:56 AM
Vanel Vanel is offline
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Wow! Thanks for all the information - and the fin patterns. This is great!

Carl, I will be sending an order your way soon
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  #16  
Old 06-14-2005, 09:43 AM
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Quote:
Originally Posted by CPMcGraw
Personally, I'd go with the 12" tube and a TB-7 thrust ring internally, with a 24" length of SEMROC's Kevlar thread tied around it for the shock chord mount. I'd dare to say none of us on this forum use the old Estes method for attaching mounts anymore, unless we're in some kind of competition for classic designs where "modern" construction methods are frowned on.


I built two of these "back in the day", and if I remember correctly, the shock cord attachment was the cut-a- slit-and-tie method. I would have traced patterns and taken measurements at the time, but never could have conceived of cloning and the type of information exchange we have available now.
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  #17  
Old 06-14-2005, 11:27 AM
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Here's a pic of my original kit. The decals are pretty bad. I should have used solveset on them. Anyways, I'm not sure how well you can tell by the photo, but the Stiletto used an external coupler that was glued onto the top of the booster tube with two "pass-port" holes punched in the top where it slipped over the base of the sustainer tube. That's why the fins have those notches. I can take a photo of my kit tonight with the stages seperated. Also the booster had a thrust ring in the base similar to the Estes CC Express. Do you have this tube joiner Carl? Also, I'm very interested in that 137% upscale
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  #18  
Old 06-14-2005, 08:54 PM
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Quote:
Originally Posted by Eagle3
Here's a pic of my original kit. The decals are pretty bad. I should have used solveset on them. Anyways, I'm not sure how well you can tell by the photo, but the Stiletto used an external coupler that was glued onto the top of the booster tube with two "pass-port" holes punched in the top where it slipped over the base of the sustainer tube.

That would be the HTC-7B coupler. I have a bunch of originals here, but I'm sure others would like these available as a mass-produced item. Do you have these available yet Carl, or plans to make them? Thanks for that Centuri>Semroc Cone Reference List. That really helps a lot.

BTW, the Black Widow also used that HTC-7B coupler.
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  #19  
Old 06-14-2005, 11:32 PM
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Quote:
Originally Posted by Ltvscout
That would be the HTC-7B coupler. Do you have these available yet Carl, or plans to make them?


We have them!

Hollow Tube Couplers
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  #20  
Old 06-14-2005, 11:37 PM
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Quote:
Originally Posted by Vanel
Carl, I will be sending an order your way soon


Thanks, Bill!

You will get two slightly different sets of the 137% upscale fins. The first has the cutouts for an external coupler which is not needed and the second is clean along the root edge with no cutouts.

Let us know how it turns out!
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