[RocketsNW] Parachute protection options

[Bloom, Steven E]

You have cardboard pistons in your vehicle and compressor?!?!???

Seriously :>),  The tolerances, surface smoothness, and lack of a rag (parachute) laying on top of the piston make comparison..... incomparable.

steve 

-----Original Message-----
From: Bryan Young [mailto:foreveryoung at inlandnet.com] 
Sent: Tuesday, November 11, 2008 11:26 AM
To: kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
Cc: rockets at rocketsnw.com
Subject: Re: [RocketsNW] Parachute protection options

It sounds like I need to learn how pistons are designed -- they seem to work well enough in my air compressor and vehicles. Are there any references that contain piston design that I could look into?
-B

-----Original Message-----
From: rockets-bounces at rocketsnw.com [mailto:rockets-bounces at rocketsnw.com]
On Behalf Of kmcgoffin at worldaccessnet.com
Sent: Tuesday, November 11, 2008 2:19 AM
To: Mfreptiles at aol.com
Cc: rockets at rocketsnw.com
Subject: Re: [RocketsNW] Parachute protection options

Yes, it seems to be a delicate balance between having enough clearance to avoid binding, and having too much clearance that can catch the parachute or allow the piston to tilt enough to 'catch'.  It's a rather fault-intolerant design.  Best suited for rockets made with high grade materials and given lots of TLC before launch.  Not good for "stuff another motor in and fly 'er" type hobby rockets.

That may have something to do with why I was never a regular user of piston ejection.  :-)
+McG+


> In a message dated 11/9/2008 2:50:17 A.M. Pacific Standard Time, 
> kmcgoffin at worldaccessnet.com writes:
> (I always wondered why the parachute didn't bind between the piston 
> and body tube.)  I dunno.
>  
> It sometimes does, especially with overzealous sanding of the piston 
> skirt.  The larger the airframe diameter, the more likely this can 
> happen since tolerances are usually greater.
>  
> Mike F.
> AOL Search: Your one stop for directions, recipes and all other 
> Holiday needs.
>
http://pr.atwola.com/promoclk/100000075x1212792382x1200798498/aol?redir=http
://searchblog.aol.com/2008/11/04/happy-holidays-from-aol-search/?ncid=emlcnt
ussear00000001
> Search Now
> .
> _______________________________________________
> Rockets mailing list
> Rockets at rocketsnw.com
> http://mx1.blastzone.com/mailman/listinfo/rockets
>


_______________________________________________
Rockets mailing list
Rockets at rocketsnw.com
http://mx1.blastzone.com/mailman/listinfo/rockets
  

_______________________________________________
Rockets mailing list
Rockets at rocketsnw.com
http://mx1.blastzone.com/mailman/listinfo/rockets