nitrous oxide + Ethanol engine

[n8ores]

fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/p480x480/401143_10150603803406900_750051899_11373599_1499568120_n.jpg

[syler]

What do you suppose I could do with a 20lb CO2 bottle? I have steel and aluminum on hand.

[stevep]

Hi Nathan,

Welcome to the club--I'll be watching with interest. Got your spreadsheet and will look it over fairly closely.

In the meantime, a few comments/questions:

1. Some of your links are broken--couldn't find the Rocket Lab doc; is that the China Lake document? Also the photo link didn't work.
2. Is this a motor you plan to eventually fly or just a lab/demonstration motor?
3. What are you planning to do for cooling? Regenerative? I don't see any heat calcs in your spreadsheet. I honestly don't think you can use aluminum without some sort of cooling.
4. Your nozzle angles are OK; I typically use 12 degrees for the exit; you get a bit better thrust, the tradeoff being a slightly heavier nozzle (not a problem if you don't plan to fly it). Just use a straight conical nozzle until you get some experience, then if you want to optimize for flight, go with a bell. The advantage of the bell is not that you get better thrust, it's that you get a lighter nozzle since it can be shorter. For non-flight motors, you don't care.

--Steve

[stevep]

Never mind...just now realized this was a 2-year old thread that just got bumped up....geesh....

--Steve

[oxliver]

here's a picture of my project so far mite be firing it up in about two weeks to test the jets in the frame .

[oxliver]

s1377.photobucket.com/user/oxlierracing/media/jetbikea_zpsbec0650a.jpg.html?sort=3&o=0
try this one

[oxliver]

so you guy's are talking about something like this .