[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Analysis of AO-40 Telemetry From Bipropellant Engine Burn Attempts


I agree with you ,  however, I am unwilling to draw that conclusion
without being able to calculate the expected value.  To do so would
require more data and an understanding of the spacecraft construction.

Rich Burgan, WC8J


Phil Karn wrote:

> >rises from 0 to 15.6 Bar. Also the helium tank pressure may have
> >cooled from 10.7 to 8.1 C.  (This may also be due to 'stirring' of
> >tank contents caused by acceleration.) Later indications from
> No, just think of "adiabatic expansion".
> AO-10 was never able to do a second burn because the helium bottle
> lost pressure after the first burn. The theory was that during the
> first burn, which went long because of a wiring error in the LIU,
> adiabatic expansion cooled the helium bottle enough for differential
> contraction of the bottle cap to lose its seal, allowing the helium to
> escape.
> Phil

Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org