Re: [PSUBS-MAILIST] rocket fuel

hi guys

rocket day was successful. , achived 6348 ft on a k motor. iwth minor damage to the rocket it will take about a hour to fix.

ps stoffed animals need only a 12 inch chute, 18 inch and you will walk forever.

but back to gas generators.

i can not figure out how to test except at depth. at a reasonable cost. maybe send a 500 lb lift bag down and inflate with gas generator might work but the costs seem to exceedthe normal systems.

rick m

----- Original Message -----

From: Akins

To: personal_submersibles@psubs.org

Sent: Sunday, November 20, 2005 1:47 PM

Subject: Re: [PSUBS-MAILIST] rocket fuel

Hi Rick.

Remember those little toy submarines that we used to put baking soda into to make them rise again? Perhaps you could have a canister of baking soda that in an

emergency could be exposed to the water so it would expand, create gas and fill your ballast tank. Sounds a bit safer than a rocket to do the same thing.

Bill.

----- Original Message -----

From: rick miller

To: personal_submersibles@psubs.org

Sent: Sunday, November 20, 2005 8:27 AM

Subject: [PSUBS-MAILIST] rocket fuel

guys

today is rocket day and will be luanching a 15 lb v2 copy expect to reach an altitude of 6000 ft. i know this is off subject but i remember the sub that used rocket motors for a gas generator for the emergency ballast. i was wondering if anyone did pressure study on rocket motors to see if they were stable under pressure. my thought is that they are self oxidizing and desinged around an internal pressure of about 200 lbs. while external pressure should not mater in the combustion, i have seen enough of these thing go boom that i would like to see some testing before using. the report from the guy that used this system from a shallow depth was that it was deafening.

rick m