66 replies to this topic

[cooperman435]

I know that stands for shotguns too but if you think of it logically the larger the bore the smaller the number. A 12 bore shotgun has a diameter which you can produce 12 perfect spheres from 1 lb of lead, a 20 bore is smaller and therefore you can produce 20 spheres from the same 1 lb of lead.

Rocket tooling goes the other way, larger tubes are a higher numerical value so Ive always assumed its either the thrust they are supposed to produce or the payload they will carry.

Hope thats right

[portfire]

Rocket tooling goes the other way, larger tubes are a higher numerical value so Ive always assumed its either the thrust they are supposed to produce or the payload they will carry.

Thats what i thought,given optimum fuel is used etc,thats what the rockets capable of lifting.


dean

[cplmac]

The rocket pound is the amount of lead you could fit in the standard tube back in the day. From what I understand this dates back centuries.

[cplmac]

I pressed another rocket on the home made 6 pound whistle tooling and fired it off tonight. This time I upped the pressure closer to normal specs, the video isn't the best but the audio is solid. The sound of this rocket was easily my favorite, and loudest of any rocket I have made to date. I headed it with some reports.


6 pound whistle

[dr thrust]

nice job! how high ? can we see a pic before you send it up next time may i ask how you build your 2lb "3 stage" rocket motors, iam very much at the begaining of rocket design with only making a few 1lb bp motor so far but would like a bit more hieght many thanks chris.

[cplmac]

The 6 lb whistle didn't go that high, definitely less than 500 feet. The three stagers are basicall a row of motors on a stick fused together and attached so that they can eject once fire is passed to the next stage. The third stage is the only one really attached to the stick securely. I definitely don't recommend building one until you have some experience with standard rockets, they have the ability to have real bad consequences if something goes wrong, like a motor leaving the stick when it shouldn't. Alignment is key with multi-stage rockets.

[dr thrust]

The 6 lb whistle didn't go that high, definitely less than 500 feet. The three stagers are basicall a row of motors on a stick fused together and attached so that they can eject once fire is passed to the next stage. The third stage is the only one really attached to the stick securely. I definitely don't recommend building one until you have some experience with standard rockets, they have the ability to have real bad consequences if something goes wrong, like a motor leaving the stick when it shouldn't. Alignment is key with multi-stage rockets.

thanks for the "staged rocket info" ive made about ten 1lb'ers so far so i'll try a two stager with a long fuse!