Subject: Question
From: Rotary Engine
Date: 9/12/2007, 12:08 PM
To: AARotary Engine



     > Is there such a thing as a rocket opening parachute?
     >
     > In other words a rocket attached to a metal static line that pulls a
     > parachute
     > out of a bag and makes it open almost instantaneously?
     >
     >
     > I am thinking of safe ways of testing a tilt rotor aircraft.
     >
     > Paul Lamar ...No rotor no motor.

    Paul... isn't that precisely what the BRS (ballistic recovery
    system) is all
    about... a ballistic deployment, a slider ring to accommodate fast     vs. slow
    speed filling of the chute.   ????  am I missing something here???
    Gary Buster
    N263GB
    Tyler Texas

    I am not sure. I don't know how it works.

    I would not necessarily like to save the airplane. Just the pilot from
    and open cockpit.

    --
    Paul Lamar ...No rotor no motor.

That is how BRS works..  And, it's a perfectly valid method for either
the craft or the pilot..


Matt-

What happens if it shoots out horzontally or down?
-- 
Paul Lamar ...No rotor no motor.


I'm not BRS expert but I'd think that would be fine.. if your
only going to use it to recover the 'tub' around the pilot and
not the whole a/c it's probably better that it shoots out the back someplace
regarldess if it's down or not. However, I would think you'd want it more
horz, than down.. so the section connected to it, doesn't fall back into the
lines or chute. I suspect that the proper method for deployment would be to
pitch forward to a near horz attitude before firing it.. this keeps the blades clear
and lets the rest of the airframe drop away.. You may very well be able
to recover the entire airframe if it was rigged so that it was lowered in a horz
position... Some forward movement is desirable.. and low alt deployment
might be a crap shoot.. only time and testing would tell for sure..

Does anyone remember the story about the guy's in a Cirrus who had
punched the chute but were going to land someplace unpleasant.. so
they fired up the engine and manouvered away from it??  Old wives tale?
I've heard it mentioned more than once but not from anyone who
'knew' the whole truth..

Jarrett



The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.