- Joined
- Jan 21, 2013
- Messages
- 1,239
- Reaction score
- 208
Anyone know how many pounds it takes for a full fill for flight of the M Contrail?
Ummmm, your nitrous density is off by quite a bit. Plus the 3200cc figure may not include losses due to ullage.
View attachment 316247
Gerald
That density graph looks off - doesn't nitrous get more dense as it is colder? That says it is less dense when it is cold.
Edward
There are many kinds of bottle warmers, some I would feel comfortable with and some not.Regardless the temperature, a liquid is not easily compressed. The volume of liquid would be the same regardless of temp, correct?
To ensure a good and quick fill, I thought of using one of those 12v racers warming blankets on the bottle when filling the motor, isn't that ok?
The 75 mm Contrail M's use a 3200 cc nitrous chamber.
Using 1.98 g/cc for nitrous, that comes to just at 14 pounds.
Karl - what temperature and density is that at? It can vary vastly depending on those variables. I have a 75 pound tank and I can never get the last 5-7 pounds out of the tank. I do use the tanks when empty of liquid as a starter to pressurize the system then I transfer over to a tank with liquid so I can conserve some liquid.
Edward
Dave,
That would work if the liquid behaved like water. After ~97 degrees, nitrous is supercritical and is neither a liquid or a gas. Also, as you heat it, more of it becomes a gas and becomes a less dense liquid. When you cool it more of it becomes a liquid and less gas.
Edward
I've seen that video a few times- any pictures of the whole rocket? it looks cool from this angle.
Enter your email address to join:
Register today and take advantage of membership benefits.
Enter your email address to join: