When I was a kid I had a Daisy 880 that was great.......... up to 50 feet.farcticox1 wrote:would a smooth bore 0.177 pellet gun be terribly inaccurate ?

If I remember well the experiments I had done with combustion cannons indicated that the ideal mix (ie not too rich or too lean) was the one that gave the most power.hectmarr wrote:A question. The difference in temperature at which the air is heated in a hybrid, varies a lot or little depending on the stoichiometric ratio of fuel gas, butane or propane, be it 3.5% up to 8%? Does anyone know or have experimented with this?
"Diablo" style pellets were originally designed to be used with smoothbore barrels so assuming you're not pushing them to transsonic velocities they should be fairly accurate. You want medium weight pellets around 7 grains that have the weight focused in the front. That being said a 0.177" rifled barrel should not be too hard to obtain, visit the "for sale" section of local forums and you should pick up a used one cheaply.would a smooth bore 0.177 pellet gun be terribly inaccurate ?
hectmarr wrote:You have to make many weapons, because this field is long and short life
Hydrogen peroxide with sodium permanganate is what provided the steam to drive the turbopump on the A-4/V-2 rocket:hectmarr wrote:I have seen that hydrogen peroxide of high concentration produces steam of hot water and under high pressure, passing through a silver grid catalyst. It is the fuel of the jetpack. It would be possible to push a bullet with this, I think. The peroxide is complicated to handle but I imagine that in small quantities it could be used.
hectmarr wrote:You have to make many weapons, because this field is long and short life
Yes, I read that it was the hardest thing to achieve in the V-2 project. This is what injects ethyl alcohol into the combustion chamber, overcoming the internal pressure of this. Tremendous work of engineering for that time. In the case of the jetpack, they use an inert gas, high pressure nitrogen, to force the oxygenated water, to pass through the small reaction chamber that contains the catalyst. Complicated, no doubt, even if it does not seem so.jackssmirkingrevenge wrote:Hydrogen peroxide with sodium permanganate is what provided the steam to drive the turbopump on the A-4/V-2 rocket:hectmarr wrote:I have seen that hydrogen peroxide of high concentration produces steam of hot water and under high pressure, passing through a silver grid catalyst. It is the fuel of the jetpack. It would be possible to push a bullet with this, I think. The peroxide is complicated to handle but I imagine that in small quantities it could be used.
https://v2rockethistory.com/gmedia/a4-v ... ifold-jpg/
hectmarr wrote:You have to make many weapons, because this field is long and short life
wow !! how lucky you are. It is an interesting piece of history. We, with the guys from the model airplane club, make a few, with and without valve on a clear scale. Engine interesting and quite simple to build.farcticox1 wrote:Saw one, actually 2 of those at Duxford IWM
Here's mine, it seems the piston caught my eye as did the fragmentation damagefarcticox1 wrote:Saw one, actually 2 of those at Duxford IWM
Nice work! You should make a thread in the off-topic section, that's what this part of the forum is for!Without a doubt, I would like it. I actually have the planes as a hobby, which I build myself. Although it is out of topic I show you some.
hectmarr wrote:You have to make many weapons, because this field is long and short life