[RocketsNW] Parachute protection options

Tue Nov 25 17:21:28 PST 2008

you could always go with redundancy and place a charge under the parachute to ensure it really comes out.

 EMAILING FOR THE GREATER GOODJoin me> From: winningstad at comcast.net> To: steven.e.bloom at boeing.com; steve-c at ix.netcom.com; Simpsonclark at aol.com; foreveryoung at inlandnet.com; kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com> Date: Mon, 17 Nov 2008 18:17:19 -0800> CC: rockets at rocketsnw.com> Subject: Re: [RocketsNW] Parachute protection options> > ...piston recovery uses less BP.> > ...piston recovery is, like, way-cool.> > ...I like complicated systems.> > ...risk is SO invigorating!> > Dennis S Winningstad> > 503-781-3529> > "Why not go to war just for oil? We need oil. What do Hollywood celebrities> imagine fuels their private jets? How do they think their cocaine is> delivered to them?"> > Ann Coulter> > > -----Original Message-----> From: rockets-bounces at rocketsnw.com [mailto:rockets-bounces at rocketsnw.com]> On Behalf Of Bloom, Steven E> Sent: Monday, November 17, 2008 6:33 AM> To: Steve Cutonilli; Simpsonclark at aol.com; foreveryoung at inlandnet.com;> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com> Cc: rockets at rocketsnw.com> Subject: Re: [RocketsNW] Parachute protection options> > While I don't use pistons, I could still possibly offer some alternate> creative solutions. First, could you finish the following sentence?> > This airframe requires a piston recovery system because...> > steve> > -----Original Message-----> From: Steve Cutonilli [mailto:steve-c at ix.netcom.com] > Sent: Sunday, November 16, 2008 9:32 PM> To: Bloom, Steven E; Simpsonclark at aol.com; foreveryoung at inlandnet.com;> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com> Cc: rockets at rocketsnw.com> Subject: RE: [RocketsNW] Parachute protection options> > You sir are a better man than I - can you describe component specs and> space allowances? The original thread on pistons pertained to 38mm -> for all other formats you are probably correct. /Steve > > -----Original Message-----> From: rockets-bounces at rocketsnw.com> [mailto:rockets-bounces at rocketsnw.com] On Behalf Of Bloom, Steven E> Sent: Wednesday, November 12, 2008 1:28 PM> To: Simpsonclark at aol.com; foreveryoung at inlandnet.com;> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com> Cc: rockets at rocketsnw.com> Subject: Re: [RocketsNW] Parachute protection options> > or just wrap it in a burrito and toss in a handfull of dog barf.....> > :>)> > ________________________________> > From: Simpsonclark at aol.com [mailto:Simpsonclark at aol.com]> Sent: Wednesday, November 12, 2008 9:36 AM> To: Bloom, Steven E; foreveryoung at inlandnet.com;> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com> Cc: rockets at rocketsnw.com> Subject: Re: [RocketsNW] Parachute protection options> > > Graphite or glass composite pistons molded to match the inside of the> glass body tube and then sealed with an O-ring in a simple sawn and> filed groove can maintain 3 or 4 thousandths radial clearance, which is> the recommended clearance. That won't grab a rolled and shroud-wrapped> chute. The pistons can be molded by draping a cylinder with wet glass> and pushing it to the bottom of a release-coated short piece of body> tube and then setting it on a release-coated surface, ideally a convexly> curved surface. I have no standard preference respecting the> installation orientation. Lube the body tube with silicone grease.> -Robert> > In a message dated 11/11/2008 12:35:04 P.M. Pacific Daylight Time,> steven.e.bloom at boeing.com writes:> > 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=em> lcnt> 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> > _______________________________________________> Rockets mailing list> Rockets at rocketsnw.com> http://mx1.blastzone.com/mailman/listinfo/rockets> > > > > > ________________________________> > Get the Moviefone Toolbar> <http://pr.atwola.com/promoclk/100000075x1212774565x1200812037/aol?redir> =http://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown0000000> 1> . Showtimes, theaters, movie news & more!> > _______________________________________________> 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> 
-------------- next part --------------
you could always go with redundancy and place a charge under the parachute to ensure it really comes out.
http://im.live.com/Messenger/IM/Home/?source=EML_WLHM_GreaterGood http://gfx1.hotmail.com/mail/w3/ltr/i_charity.gif EMAILING FOR THE GREATER GOOD
Join me
> From: winningstad at comcast.net
> To: steven.e.bloom at boeing.com; steve-c at ix.netcom.com; Simpsonclark at aol.com; foreveryoung at inlandnet.com; kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
> Date: Mon, 17 Nov 2008 18:17:19 -0800
> CC: rockets at rocketsnw.com
> Subject: Re: [RocketsNW] Parachute protection options
>
> ...piston recovery uses less BP.
>
> ...piston recovery is, like, way-cool.
>
> ...I like complicated systems.
>
> ...risk is SO invigorating!
>
> Dennis S Winningstad
>
> 503-781-3529
>
> "Why not go to war just for oil? We need oil. What do Hollywood celebrities
> imagine fuels their private jets? How do they think their cocaine is
> delivered to them?"
>
> Ann Coulter
>
>
> -----Original Message-----
> From: rockets-bounces at rocketsnw.com [mailto:rockets-bounces at rocketsnw.com]
> On Behalf Of Bloom, Steven E
> Sent: Monday, November 17, 2008 6:33 AM
> To: Steve Cutonilli; Simpsonclark at aol.com; foreveryoung at inlandnet.com;
> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
> Cc: rockets at rocketsnw.com
> Subject: Re: [RocketsNW] Parachute protection options
>
> While I don't use pistons, I could still possibly offer some alternate
> creative solutions. First, could you finish the following sentence?
>
> This airframe requires a piston recovery system because...
>
> steve
>
> -----Original Message-----
> From: Steve Cutonilli [mailto:steve-c at ix.netcom.com]
> Sent: Sunday, November 16, 2008 9:32 PM
> To: Bloom, Steven E; Simpsonclark at aol.com; foreveryoung at inlandnet.com;
> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
> Cc: rockets at rocketsnw.com
> Subject: RE: [RocketsNW] Parachute protection options
>
> You sir are a better man than I - can you describe component specs and
> space allowances? The original thread on pistons pertained to 38mm -
> for all other formats you are probably correct. /Steve
>
> -----Original Message-----
> From: rockets-bounces at rocketsnw.com
> [mailto:rockets-bounces at rocketsnw.com] On Behalf Of Bloom, Steven E
> Sent: Wednesday, November 12, 2008 1:28 PM
> To: Simpsonclark at aol.com; foreveryoung at inlandnet.com;
> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
> Cc: rockets at rocketsnw.com
> Subject: Re: [RocketsNW] Parachute protection options
>
> or just wrap it in a burrito and toss in a handfull of dog barf.....
>
> :>)
>
> ________________________________
>
> From: Simpsonclark at aol.com [mailto:Simpsonclark at aol.com]
> Sent: Wednesday, November 12, 2008 9:36 AM
> To: Bloom, Steven E; foreveryoung at inlandnet.com;
> kmcgoffin at worldaccessnet.com; Mfreptiles at aol.com
> Cc: rockets at rocketsnw.com
> Subject: Re: [RocketsNW] Parachute protection options
>
>
> Graphite or glass composite pistons molded to match the inside of the
> glass body tube and then sealed with an O-ring in a simple sawn and
> filed groove can maintain 3 or 4 thousandths radial clearance, which is
> the recommended clearance. That won't grab a rolled and shroud-wrapped
> chute. The pistons can be molded by draping a cylinder with wet glass
> and pushing it to the bottom of a release-coated short piece of body
> tube and then setting it on a release-coated surface, ideally a convexly
> curved surface. I have no standard preference respecting the
> installation orientation. Lube the body tube with silicone grease.
> -Robert
>
> In a message dated 11/11/2008 12:35:04 P.M. Pacific Daylight Time,
> steven.e.bloom at boeing.com writes:
>
> 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=em
> lcnt
> 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
>
> _______________________________________________
> Rockets mailing list
> Rockets at rocketsnw.com
> http://mx1.blastzone.com/mailman/listinfo/rockets
>
>
>
>
>
> ________________________________
>
> Get the Moviefone Toolbar
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> 1> . Showtimes, theaters, movie news & more!
>
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