Search found 557 matches

by Al Belli
Sun Apr 25, 2004 7:08 pm
Forum: Off topic forum
Topic: JB weld
Replies: 6
Views: 2505

Thermosteel

I have used this material. It is strong but tends to be brittle, so I recommend a stiff fitup prior to application of the Thermosteel. The material is sodium silicate reinforced with granulated steel. Sodium silicate forms a glass-like mass when dry; that is why it is commonly called waterglass. Al ...
by Al Belli
Thu Apr 22, 2004 11:45 am
Forum: Tools and Construction
Topic: DIY TIG Rossco style & other tools
Replies: 10
Views: 5416

AC TIG

I have not used My tig setup on AC. It should be ok on AC.

Al Belli
by Al Belli
Wed Apr 21, 2004 11:30 pm
Forum: Tools and Construction
Topic: DIY TIG Rossco style & other tools
Replies: 10
Views: 5416

Welder HF & Argon control

I built a HF control and Argon postflow circuit assembly which works if You do not have the HF operating. As soon as the HF comes on, the 555 timers lock up and do not shut off. I have even tried isolating the inputs and outputs using electromechanical relays, and that did not work. After much exper...
by Al Belli
Fri Apr 16, 2004 6:33 pm
Forum: Valveless pulsejet forum
Topic: Lockwood Thesis at my school library
Replies: 10
Views: 5087

durley drum

Here is a sketch showing a typical setup for measuring pulsed flows.
Al Belli
by Al Belli
Fri Apr 09, 2004 1:02 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

HF unit

Hi,
Use 1/4" o.d. tube for the outside coil, ans the solid wire that You have for the inner primary coil.
The spark plugs that I used are non-resistor type spark plugs.

Al Belli
by Al Belli
Thu Apr 08, 2004 9:11 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

HF unit

Hi, High frequency travels on the surface of conductors, so the 1/4" tube is much more efficient than a smaller diameter conductor. You need not have the spark gap any larger than .040". The starting sparks may appear to be quite small, but with the argon flow, the arc will start very easily. Excess...
by Al Belli
Wed Apr 07, 2004 1:01 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

Resistors

Hi,

Wirewound resistors are what I used in My welder.
They work very well in this application.

Al Belli
by Al Belli
Wed Mar 31, 2004 11:40 pm
Forum: Valved pulsejet forum
Topic: Pulsed Outboard Motor?
Replies: 42
Views: 21703

giant pulsating water pump

When I worked at Bowles Engineering during the mid 60's, a gentleman I worked with was trying to build a pistonless outboard motor based on the pulsejet principle. Ray Bowles was encouraging Him to try it. While assisting him in doing some testing, He told Me about a giant waterpump somewhere in Eur...
by Al Belli
Wed Mar 31, 2004 12:44 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

Transformer

Hi Capt,
The transformer unit is ok. Start with a spark gap of about .030".
I made My spark gap from two spark plugs with the ground electrodes removed, and mounted with the center electrodes facing each other.

Al Belli
by Al Belli
Mon Mar 29, 2004 7:31 pm
Forum: Valved pulsejet forum
Topic: Steam turbine turbo charger idea.
Replies: 15
Views: 11572

Simple turbine

A simple to machine turbine wheel can be made by ballmill drilling a series of angled holes from both sides of a disk. The nozzles can be finished to size by using diemakers tapered pin reamers, which also gives a nicely tapered inlet to the nozzle outlet. The turbines can be staged, but the nozzles...
by Al Belli
Mon Mar 29, 2004 5:55 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

HF Transformer

Here's a circuit using a different coupler for the HF on a plasma torch. The reactor ( L1 ) is diagrammed as an iron core inductor, but in a photo of the unit it appears to be air core. I prefer the isolation of the high voltage system provided by the " Tesla " dual coil design. No 60 Hz. 12,000 V. ...
by Al Belli
Mon Mar 29, 2004 5:32 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

Filler rod/wire

I use .024" stainless steel Mig wire that comes on a spool.
It works very well on 24 Ga. stainless.

Al Belli
by Al Belli
Sun Mar 28, 2004 8:31 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

Welding

Hi, I use an overlap on circular joints; make one tube fit over the other, and You have a lap joint. I use about 1/4" overlap. You can also make a thin backing ring to go inside the tubes, which acts like a lap joint. Or if You prefer, the ring can go outside the tubes, and it will do the same thing...
by Al Belli
Sun Mar 28, 2004 4:52 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

Welding sample

Hi,

The following attachments show a lap-seam weld on type 304 stainless
.024" thick, using 20 A. and a 040" ceriated electrode. I varied the
feedrate to show the increase in bead width. Note the full penetration at this current and speed. No filler rod was needed.

Al Belli
by Al Belli
Sun Mar 28, 2004 3:53 pm
Forum: Tools and Construction
Topic: Welding thin stainless
Replies: 45
Views: 25331

AC output from alternator

Hi Capt,

The alternator produces AC and is rectified by the internal diodes.
You can obtain AC by tapping off before the diodes, thereby eliminating the need for an inverter.

Al Belli