Activity

Actually nine players – Mark Stumbaugh paid his entry fee but has yet to fly anything contest related.

There are eight flyers who have entered and made flights in the Alphabet Clone Contest. Still lots of the flying year to play this out!Jon Skuba- Completed E – 19 Credited Flights – 0 DQ’d flights (tiebreaker=19)Bear Friedrichs- Completed E…   Read more»

Remember that MHM is the last time you can register for the Alphabet Clone Contest. Get your twenty bucks to me or Joe and start up the ladder.Chad

The Alphabet Clone Contest still only has 6 entries. MHM is the last opportunity to plunk down your $20 and compete.Jon Skuba is in the lead and has completed his second E flight with no DQs to date. Bear Friedrichs…   Read more»

So we finally finished the project and it was due today. We rushed to even get a good test off and did the first and only successful test yesterday. We ended up using a oxygen cylinder and a ball valve….   Read more»

I have a copy of “Steam Rockets-2” by B.J. Humphreys and F.B. Wagner, Areo-Visions, Inc Manuals of Steam Rockets 1972. Also their “Hot Water Rockets, Development and Applications by Robert Truax a bit later vintage 1980.The bird described uses a…   Read more»

Anyone know a way that we could heat the tank? To temperatures of about 700 degrees? Heater blankets, even a burner.Since you are not launching this motor, seems like propane torch or single camp stove burner would be straightforward. Get…   Read more»

While it is always a mistake (or not) to transfer theories and applications from one mode to another, what if the water tank was pre-heated, for pressure, but also to spray the “pre-steam” into a “steam chamber,” just as liquid…   Read more»

Anyone know a way that we could heat the tank? To temperatures of about 700 degrees? Heater blankets, even a burner.

Alright that sounds good. Well start working on numbers once I get back from spring break. Chris I go to Mesa State in Grand Junction, and you have more then helped me, pretty much saved your asses. Ill post the…   Read more»

Sorry, Shredder, just an initial glance at your project. Mean is not in my nature. You guys are really making my day! However, Chris is still right in everything he’s said. Gas out of a nozzle cannot change. HOWEVER, how…   Read more»

You can figure out the appropriate temperature and pressure fairly easily from the phase diagram of water. The numbers I used before (1000 PSI at 550F) are actually attainable using the heating-only method. Also, given my calculations, you’ll likely need…   Read more»

How could we heat water hot enough to create that much pressure? Wouldnt those temperatures be extremely high? Which would then limit valves we could use and even how to heat it to such a high temp?

OK, here are the equations, with somewhat of an explanation. For a nozzle flow, the key defining factor is known as choked flow. When you have choked flow through a nozzle, the flow in the nozzle throat is at mach…   Read more»

Why would you need to pressurize the tank? When you heat the tank, it will pressurize itself.(By the way, just out of curiosity, which school are you going to?)

No dynamics yet, only in my first year. If you could just copy over the equations that would be fine. The only problem with trying to make steam in the upper conatiner is now we have to find a new…   Read more»

What equations are you using for those numbers? I cant even start to understand the dynamics books I looked at.Well the equations are fairly complicated, so the easy way is to use tables (which is what I did). However, I…   Read more»

So basically that idea would mean you fill the tank partially of water and heat it till its all vapor? Then release it throught the valve and nozzle? Wouldnt that limit the amount of vapor you could produce? If you…   Read more»

What equations are you using for those numbers? I cant even start to understand the dynamics books I looked at.

So basically that idea would mean you fill the tank partially of water and heat it till its all vapor? Then release it throught the valve and nozzle? Wouldnt that limit the amount of vapor you could produce? If you…   Read more»