Search found 557 matches

by Al Belli
Wed Apr 18, 2007 10:09 pm
Forum: Tools and Construction
Topic: Welding for Newbies - or, in this case, for me ... :)
Replies: 25
Views: 13490

Welder source

Hi toakreon,

The brand name is Chicago, but the item is made in the Orient, maybe China.

I'm sure that someone in Europe must sell the same item under a different brand name.

If I were You, I'd look on the Internet for someone near You.

Al Belli
by Al Belli
Wed Apr 18, 2007 7:25 pm
Forum: Tools and Construction
Topic: Welding for Newbies - or, in this case, for me ... :)
Replies: 25
Views: 13490

Inexpensive TIG Welder

Hi, Here's an inexpensive TIG welder that might be good for Your use. It will go down to about 5 Amps for very thin work. You will need a bottle of pure argon, and some 0.040" ceriated tungsten electrodes and a 0.040" collet. http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=91811 Al ...
by Al Belli
Wed Apr 18, 2007 6:58 pm
Forum: Tools and Construction
Topic: Welding for Newbies - or, in this case, for me ... :)
Replies: 25
Views: 13490

Welding Nozzles

Hi toakreon, The lower the number, the smaller the nozzle. I would suggest a #1 nozzle for thin material. ( or a #0 nozzle for very thin material ) I would recommend Solar flux type B, which is widely available. Do NOT use a fluoride type flux, since the fumes generated during welding, are very irri...
by Al Belli
Wed Apr 04, 2007 9:55 pm
Forum: Tools and Construction
Topic: Steam engine
Replies: 37
Views: 21636

Thinwall tube bending

Hi,

Fill the tube with molten lead or a lead alloy.

When the lead freezes and is at room temperature, bend the " rod " to the required bend, and then melt the lead out.

This will work with very thin tubes.

Al Belli
by Al Belli
Fri Mar 30, 2007 10:20 pm
Forum: Valved pulsejet forum
Topic: Pulse Jet Intake Air Velocity
Replies: 28
Views: 12626

Leaky valves

Hi,

A quote from NACA TM- 1131





Al Belli
by Al Belli
Fri Mar 16, 2007 11:13 pm
Forum: Valved pulsejet forum
Topic: On pulsejet kriz 1
Replies: 8
Views: 4898

jet type

Hi,

It is a PULSO 3 ( see plan on this site ).


Al Belli
by Al Belli
Tue Mar 06, 2007 11:02 pm
Forum: Valved pulsejet forum
Topic: Valve Grid
Replies: 1
Views: 1890

Valve Grid

Hi Targa2,

I would add a 3mm wide support centrally located in the long direction to give two 30mm X 8.5mm ports, or widen the port to give two 30mm X 10mm ports.

Al Belli
by Al Belli
Thu Mar 01, 2007 1:33 am
Forum: Valveless pulsejet forum
Topic: Top secret !
Replies: 12
Views: 4176

Bach "off subject note"

Hi Larry,

Have You heard the E. Power Biggs performance of the T&F in D on the Biggs plays the Thomaskirche organ album ?( Bach's organ )

It is the most inspired version that I have heard !!!

And Yes, I am a classical pipe organ " nut ".

Al Belli
by Al Belli
Tue Feb 27, 2007 2:50 pm
Forum: Valveless pulsejet forum
Topic: ~~Theoritical valveless~~
Replies: 3
Views: 2077

Hi _Rahul_,

Here are my calculators.

Al Belli
by Al Belli
Tue Feb 27, 2007 2:42 pm
Forum: Valveless pulsejet forum
Topic: ~~Theoritical valveless~~
Replies: 3
Views: 2077

Hi _Rahul_,

Here is some useful data.


Al Belli
by Al Belli
Mon Feb 26, 2007 1:36 pm
Forum: Valved pulsejet forum
Topic: Pulse Jet Calculator
Replies: 10
Views: 5093

calculators

Hi craigclavin, Eric Beck has created a very useful calculator that I have used to determine the dimensions corresponding to many of the pulsejet plans shown on this site. Bruce Simpson's calculator has given results that, I have determined, are not following the parameters outlined by Tharratt, and...
by Al Belli
Sat Feb 24, 2007 7:34 pm
Forum: Rocket forum
Topic: Solid fuel questions
Replies: 60
Views: 30770

Curtiss Wright thruster

Hi Viv, A small divergent nozzle was attached to a mechanically operated breech block assembly that contained the drive sprockets which fed the cap containing tape through the system. The cap was electrically fired by a small heating coil. The assembly was very small with a nozzle outlet of about 5 ...
by Al Belli
Sat Feb 24, 2007 1:42 pm
Forum: Rocket forum
Topic: Solid fuel questions
Replies: 60
Views: 30770

solid fuel pellet rocket

Hi,

Curtis Wright corporation produced small vernier rocket engines using a roll of "caps" similar to a toy cap gun.

Al Belli
by Al Belli
Sun Feb 04, 2007 7:11 pm
Forum: Valved pulsejet forum
Topic: Max Speed? Please help.
Replies: 10
Views: 4355

Maximum velocity

Hi Ianthegr8,

The maximum level flight velocity occurs when the drag of the aircraft becomes equal to the available thrust of the engine.

As You can see, without knowing the drag, it is difficult to estimate the maximum velocity of the aircraft.

Al Belli
by Al Belli
Sat Feb 03, 2007 4:25 pm
Forum: Gas turbine forum
Topic: Compressor Injection
Replies: 10
Views: 5996

fuel pumps

Hi,

The rubber that the impeller is molded from is not resistant to gasoline, and softens due to the solvent effect.

Al Belli