BP rockets tools

[Givat]

Hi guys, I'm planning to make some defferent sizes BP rocket tools.

I got this table from PassFire:

http://img232.imageshack.us/img232/3858/rocketsize5ws.jpg

 

But it's only give me the ID and the length, for tools I need also the spindle diameter and length.

 

Can some one please give me this measurements?

[somebody]

From Mike Swisher on rec.pyro:

 

For black powder rockets, let the case length be 10 times its inside diameter.

Let the spindle's over-all length be 8 times the

case i.d.; of this, the base which supports the case should be one case i.d.

tall, and the tapering portion of the spindle should

be 7 times the case i.d. Let the spindle taper from 1/2 the case i.d. at base to

1/4 the case i.d. at its tip, and the tip should

be domed with a radius of 1/8 the case i.d. Enough room is provided in the case

for a massif, or solid increment of

composition, having 1 to 1-1/2 times the case i.d., to be rammed above the

spindle, which will normally be sufficient. These

dimensions should do for standard American rocket sizes from 4-oz. to 4-lb.

 

Should be really usefull information!

[Givat]

Very useful information indeed.

I want to make a cylindrical core and not conical, its much more easy for building and working with the tools.

So I guess I will make the spindle 3/8 of the ID. (average of 1/4 the ID and 1/2 the ID).

 

Thnaks for the help.

[Mumbles]

I'd recomend at least tapering the spindle slightly. It really makes the removal easier. I can't tell you how many just cylindrical spindles I have gotten stuck. Even a slight taper, say a few rubs with some sand paper, with a very fine grit to smooth everything out works wonders.

[Pyrohawk]

Its nice to have a good taper at the bottom of the spindle. You can do that by spreading a little epoxy against the spindle base. It will cling to itself and form a nice rounded taper if you are careful. Just mix up a little and brush it on with a cue tip (things for cleaning ears).

 

Here take a look at my fountain tool, the only difference would be that my spindle would be a little longer if it was a rocket.....

http://img.photobucket.com/albums/v389/pyr..._15/spindle.jpg

 

I assume you have seen it but just in case here is a good site on making tooling....

 

http://www.wecreate4u.net/dwilliams/fountain/fountain.html

[BigBang]

A slight taper is very helpful with rammed motors. When I make composite engines, I use a teflon "spindle." This could be helpful, or at least better than a wooden spindle. For "easy" removal, the spindle must be relitivly smooth, or else it will usually get stuck.

 

*painting the spindle in finishing epoxy has been said to help IIRC.

[psymon]

HI,

 

I am not sure about anyone else but I found that most information about rocket tools and sizes to be incorrect when I made my own tools.

It took me months to work out that my fuel is much more powerful than others. I use a 61% Kno3 34% c and 5%s mix ball milled for an hour to make my fuel.

My tools are aluminium bar at 22mm diameter with a hole drilled in the centre of 5mm. I use a couple of different engine inlet valves to make the core. The stem on the valves are either 5mm or 6.5mm depending on the size of rocket I am making. The longest stem tool I make stinger missiles with. The core for them is 40mm with a nozzle of around 15mm length. For normal rockets I use a core of 15mm.

Whenever I produced a rocket engine using internet published figures I always had a CATO. Some of the engines exploded so loud it hurt my ears.

Basically I think you need to work out your tools for yourself. By all means use the figures people quote here as a guide but at least in my experience I had to work it all out for myself...

[aa92td]

i made my bp rocket tools by myself, they look lame but work great.

diameter- 1.5 cm

core- 3 cm

rocket height- 7 cm

 

http://i7.photobucket.com/albums/y277/AgwA/shonot/spindle.jpg

http://i7.photobucket.com/albums/y277/AgwA/shonot/dohes.jpg

complete rocket.

http://i7.photobucket.com/albums/y277/AgwA/shonot/rrr.jpg

http://i7.photobucket.com/albums/y277/AgwA/shonot/1r.jpg

[Sason.net]

well like Agwa i have similar rocket tools it is made of wood base a naile and a wooden rod with a hole that was drilled inside

it a 1 cm bp rocket tools the rockets are 6 cm tall and the core 2.5 cm long and 2 mm thick

here is a picture:

 

http://img438.imageshack.us/img438/5936/dsc012838rp.jpg

this is the rod:

http://img344.imageshack.us/img344/3933/dsc012848xe.jpg

and this is a finished BP rocket with a payload:

 

http://img132.imageshack.us/img132/5531/dsc012895io.jpg

 

 

here is a video of my 1 cm bp rocket with little small stars:

 

http://media.putfile.com/BP-rocketpayload

 

my tools looke lame, but it works fine and dont do any problems.

im planing to make metal bp rockets tools but ill bild them when i would have time

[TheSidewinder]

To the original poster:

 

If you are serious about making your own tooling from metals, get Dave Sleeter's book, "Amateur Rocket Motor Construction". The detailed engineering drawings in them alone is worth the price.

 

M

[teknix]

I agree about Sleeter's book. I tried to order that book about 10 years ago when i first started out but he said he took it out of print to make a new edition and it should be done soon. And so the waiting began and yay 10 years later he releases his big book on rockets. I must say it is well worth it! Very nice book with lots of detials on tooling and rocket engines. I love that book and highly recommend it.

[psymon]

Have you tried using some aluminium foil to start your nozzles? I use a strip of foil about 20cm wide. Then crunch it up to form a thin string of foil. I then wrap it around my nozzle former to start. Then I fill the tube with my betonite clay.

I use it to stop the betonite clay from falling out from the sides of the tube before you ram it. You cant use aluminium foil on its own because when you form the nozzle the foil does not spread and it does not grip the tube. You have to use clay too. I just think it makes really perfect looking nozzles that dont crumble and look messy.

[aa92td]

Have you tried using some aluminium foil to start your nozzles? I use a strip of foil about 20cm wide. Then crunch it up to form a thin string of foil. I then wrap it around my nozzle former to start. Then I fill the tube with my betonite clay.

I use it to stop the betonite clay from falling out from the sides of the tube before you ram it. You cant use aluminium foil on its own because when you form the nozzle the foil does not spread and it does not grip the tube. You have to use clay too. I just think it makes really perfect looking nozzles that dont crumble and look messy.

I think is unnecessary you made your rockets for you own hubby, and not for another people, so its can look messy but should work great.

Its just a waste of a expensive time.

[psymon]

The main reason I use foil is to stop the betonite clay from spilling out from the sides of the tube before ramming it. A roll of foil costs less than 50p and lasts for about 100 rockets. The nozzles look good after but thats not the reason for using it. Also if I need to use a vice to remove the core and nozzle former it stops the clay from crumbling.

[Sason.net]

well I think it is a good way to prevent the betonit clay from crumbling

it happens to me a lot. i'll try it

 

 

 

and i dont think it is such a waste of time and money because if it really works so it is not considered as a wast of time and metirial

[snow]

any one here have the tools for 1" rockets?

and\or can give their sizes?

[Mumbles]

See the second post in this thread.

[Caleb51]

Can someone explain to me how rocket tooling works? No site I've found explains what they do. What is the spindle? Whats it's purpose, et cetera. Thanks

[PyroPicasso]

I guess you have not looked hard enough..

 

 

with spindle

 

no spindle

[Mephistos Minion]

Good time for this thread to be brought back up. I made my first decent spindle today using 12mm Stainless steel. Taper of one degree allowed for the base of the spindle to be 6mm and the top 3mm. its about 65mm long. Stainless is alot easier to machine than I thought! I think I will make the rammers from Al as it is cheaper, and stainless isnt really that neccesary except for the spindle.

 

Pics:

 

Spindle and base:

 

http://img.photobucket.com/albums/v466/mep...eOnBase12mm.jpg

 

Closer look at spindle:

http://img.photobucket.com/albums/v466/mep...Spindle12mm.jpg

[Frozentech]

Very nice job ! If you were to add checkering to the edge of the base, it would just like a Wolter or Pyrotooling piece.

[Sason.net]

Hello guys, my friend has a lathe and he said he can make me rocket tools so i already got 1/2 " bp rocket tools from he's lathe and now i want him to make me some 1" rocket tools

the only problem that i got is that i dont have precise sizes for 1 " rocket tools i have looked over those 1 " rocket tools sizes that are written in the second post on this thread and those sizes dont look very good

 

whould you help me and bring me some good sizes of 1"bp rocket tools ?

[d4j0n]

The clay shouldnt even fall out if you're using a nipple on your tooling...

 

my less-than-a-dollar 2oz rocket tooling (brass brushing, washers, epoxy, nail, metal rod):

 

 

 

http://www.freepgs.com/d4j0n/pyro/rocket/metaltooling.jpg

[Sason.net]

sizes for 1" bp rocket tools? anybody?

[Mumbles]

You are a dumbass. Look at the second posts. Those are the sizes every tool maker uses. It doesn't matter if you don't think they look good because you obviously don't know shit about pyro.