Apogee B7 Ejection Umph (?)

Apogee B7 Ejection Umph (?)

Post by Andy En » Thu, 24 Dec 1998 04:00:00



Hello All,

1) Has anybody either tried or seen used, an Apogee B7 reliably ejected
a 'loosely' packed 36" chute along with an egg from either a BT55 or
BT60 of minimal length?

2) Should the answer be no, and in a manner that does not alter the
motor performance in any way,  I interpret that the Pink Book does not
disallow supplemental means (i.e. *** bands, charges of 4F BP  placed
in the ejection stream, etc.) for safe deployment.  On what basis will I
hear the Pink Book police cry foul other than "in the judgement of the
RSO"?

Happy Holidays,

Andy (pondering while driving between Huntsville, Decatur & Athens) Eng

 
 
 

Apogee B7 Ejection Umph (?)

Post by Peter Olivo » Fri, 25 Dec 1998 04:00:00


The original run of Apogee B7's have very "energetic" ejection
charges.  I don't know if they were adjusted in subsequent runs, but
you shouldn't have any trouble getting this combination to work
without supplemental means.

Quote:

>1) Has anybody either tried or seen used, an Apogee B7 reliably ejected
>a 'loosely' packed 36" chute along with an egg from either a BT55 or
>BT60 of minimal length?

>2) Should the answer be no, and in a manner that does not alter the
>motor performance in any way,  I interpret that the Pink Book does not
>disallow supplemental means (i.e. *** bands, charges of 4F BP  placed
>in the ejection stream, etc.) for safe deployment.  On what basis will I
>hear the Pink Book police cry foul other than "in the judgement of the
>RSO"?



 
 
 

Apogee B7 Ejection Umph (?)

Post by Jeff Vince » Fri, 25 Dec 1998 04:00:00



Quote:

>The original run of Apogee B7's have very "energetic" ejection
>charges.  I don't know if they were adjusted in subsequent runs, but
>you shouldn't have any trouble getting this combination to work
>without supplemental means.

   Indeed.  More of a worry is the "hibachi effect", the long, slow,
flaming burn of the delay train after the ejection charge.  Be sure to
make your EL's innards fairly flameproof (IIRC, Apogee used one of
their long couplers for tube protection/reinforcement).  Be sure to do
some practice flights.


NAR Northeast Regional Contest Board site - points and more...

 
 
 

Apogee B7 Ejection Umph (?)

Post by Wolfram v.Kipars » Wed, 30 Dec 1998 04:00:00


Quote:

>   Indeed.  More of a worry is the "hibachi effect", the long, slow,
>flaming burn of the delay train after the ejection charge.  

...which set fire to all of my B7-powered rose-a-rocs.

whirl, whirl, sizzle 'n smoke...
---
Wolfram v.Kiparski
NAR 28643