Cannopy jettison

Submitted by Anonymous on

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From: Pieter Pienaar <Pine [at] CPro.co.za>
Subject: Cannopy jettison
Date: Mon, 23 Nov 1998 19:47:12 -0800
To: <lancair.list [at] olsusa.com>

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Hi



Has anyone have pic's or sketchs, plans for a cannopy jettison mechinism

that is proven.



I'm planning the forward cannopy and would like to be able to "pop" it

if needed.



--

Pine Pienaar

pine [at] cpro.co.za

Lancair 360 #664

Cannopy jettison

Submitted by Anonymous on

From: Marvin Kaye <marvkaye [at] olsusa.com>
Subject: Re: Cannopy jettison
Date: Wed, 25 Nov 1998 00:47:10 -0500
To: <lancair.list [at] olsusa.com>
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Pine,



I always thought the idea of a jettisonable canopy, especially if you're

going to do aerobatics with a 320, was an excellent one.  The only kit that

I can remember seeing which included that feature was Mike Campbell's Dream

Catcher.  He used a cable system to a D-ring which was conspicuously

placarded for its function just below the left side of the panel.  I don't

know exactly how he ran the mechanism, but I'm pretty sure it required a

2-step process, the first operation to remove retaining pins (cotter keys)

from the hinge pins, the second to actually pull the hinge pins themselves.

 I, too, would be interested in hearing any ideas anyone has along these

lines as well.



  <Marv>

Cannopy jettison

Submitted by Anonymous on

From: Marvin Kaye <marvkaye [at] olsusa.com>
Subject: Re: Cannopy jettison
Date: Wed, 25 Nov 1998 10:34:33 -0500
To: <lancair.list [at] olsusa.com>
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Regarding the recent additions to this subject...



If you're in so much trouble that getting rid of the canopy and getting out

of the airplane is the only possible route to survival, I think the

considerations about whether or not the canopy might hurt you when it gets

dumped are moot.  Besides, a properly designed system would disconnect the

canopy at its front edge and force it to hinge up from the rear to

jettison, so I think that concern could be pretty easily addressed in the

design phase.  As for being able to actually get out once the canopy is

gone and considering the circumstances surrounding this scenario, I have a

feeling the adrenaline and survival instinct would both go a long way to

helping you find a way out of the seat.



In response to Antony's comments, yes, Mike sold the DC awhile ago.  I

spoke with him about his airplane several times, unfortunately never asked

him about the jettison mechanism.  If anyone out there knows Mike and could

get this information I'd be happy to make it available on the LML homepage.

Cannopy jettison

Submitted by Anonymous on

From: Steve Colwell <colwell [at] innercite.com>
Subject: Re: Cannopy jettison
Date: Wed, 25 Nov 1998 10:16:46 -0800
To: a <lancair.list [at] olsusa.com>
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<<a D-ring which was conspicuously placarded for its function >>

would that be: Tail Removal Device ??



A more likely concern may be the airplane on its back and a provision for

emergency exit.  Some thoughts are:  A handle mounted to the top of the rear

windows to aid pulling them off.   Red  diagrams for Emergency access on the

outside of the fuselage as seen on military aircraft.  A knife/saw/hammer in

the cockpit.



A few years ago a Lancair 200 burned when it ran off the end of a runway

down the side of a steep canyon at a fly-in.  We left about an hour before

the accident, but my recollection is they were too far down the canyon to be

reached by anyone before fire.  Maybe a good exit system would have saved

them.          Steve