Opening nosecone

Opening nosecone

Post by GD » Thu, 05 Aug 2004 00:33:06



This project is at least a year or two away from being started, but I'd
still like to know if anyone has tried a parachute deployment from inside
a nosecone that splits in half and (each half) folds back (quickly under
spring loading I imagine).

In essence, a much much better version of this:
http://www.wilhelm-aerospace.org/Space/Gemini/adta-1.html

I imagine that the nosecone halves would perhaps be attached at the top
using a 'pin' that pulls out at deployment.  

cheers...

 
 
 

Opening nosecone

Post by Fred Shecte » Thu, 05 Aug 2004 01:42:09


You don't want the version shown in your old photo. That one was stuck.

Why not do it like all the modern payload fairings (Delta, Titan, Atlas....) ???

Getting the seam to stay sealed and not add a lot of drag is a problem and they do tend to
fall open at the wrong time. Popping a nose with a shoulder is pretty easy.

-Fred Shecter NAR 20117

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Quote:
> This project is at least a year or two away from being started, but I'd
> still like to know if anyone has tried a parachute deployment from inside
> a nosecone that splits in half and (each half) folds back (quickly under
> spring loading I imagine).

> In essence, a much much better version of this:
> http://www.wilhelm-aerospace.org/Space/Gemini/adta-1.html

> I imagine that the nosecone halves would perhaps be attached at the top
> using a 'pin' that pulls out at deployment.

> cheers...


 
 
 

Opening nosecone

Post by GD » Thu, 05 Aug 2004 18:19:59




Quote:
> Getting the seam to stay sealed and not add a lot of drag is a problem
> and they do tend to fall open at the wrong time. Popping a nose with a
> shoulder is pretty easy.

The reason I'm thinking about this is the idea of making a RC guided
parachute system.    After a bit of reading on what others before me
have done, one of the better ideas on attaching the parachute to the
rocket appears to be Daves way:
http://www.cadvision.com/albertaw/Rockets/FatBoy_parafoil/FatBoy_para...
tm

...but I thought I'd go one better with the payload fairing.  ;)

cheers...

 
 
 

Opening nosecone

Post by Bob Kapl » Sun, 15 Aug 2004 02:34:10


Quote:

> This project is at least a year or two away from being started, but I'd
> still like to know if anyone has tried a parachute deployment from inside
> a nosecone that splits in half and (each half) folds back (quickly under
> spring loading I imagine).

> In essence, a much much better version of this:
> http://www.wilhelm-aerospace.org/Space/Gemini/adta-1.html

> I imagine that the nosecone halves would perhaps be attached at the top
> using a 'pin' that pulls out at deployment.  

Many years ago the rage was SD models that split the whole body tube in half
to deploy humungus streamers. BUt that seam caused lots of drag.

I've cut away most of the base of a blow-molded nose cone for chute storage.
Deployment becomes a problem. The solution is to tie the chute to the ROCKET
instead of to the nose cone end of the shock cord. I used this on my 29mm
Big Daddy since the bigger motor used up most of the chute space.

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