Search found 557 matches

by Al Belli
Fri Sep 22, 2006 8:32 pm
Forum: Valveless pulsejet forum
Topic: First Design-mini linear
Replies: 39
Views: 18238

re: First Design-mini linear

Hi multispool, If You cut the threads by feeding the lathe carriage away from the bottom of the hole toward the right, the threading is much easier. I usually place the tool facing the rear of the bore, and run the spindle in reverse so that I can see the machining easier. I assume that You are usin...
by Al Belli
Fri Sep 22, 2006 5:07 pm
Forum: Tools and Construction
Topic: Has anyone used a STITCH Welder?
Replies: 62
Views: 31675

re: Has anyone used a STITCH Welder?

Hi Larry,

Your problem is why commercial sound distribution systems use a 70 volt high impedance output.
Each speaker has an adjustable matching transformer which allows the desired amount of volume / power to be selected.

Al Belli
by Al Belli
Tue Sep 12, 2006 3:32 pm
Forum: Valved pulsejet forum
Topic: Questions/comments about my Pulsejet Design.
Replies: 9
Views: 4055

re: Questions/comments about my Pulsejet Design.

Hi Najm, The lengths of the system's parts are more important than the diameters. According to Tharratt, the thrust of the pulsejet can be calculated by the following formula : ( Total system volume in cubic feet / total system length in feet ) X 316 I have found this formula very useful to evaluate...
by Al Belli
Fri Sep 08, 2006 6:37 pm
Forum: Valveless pulsejet forum
Topic: Copper pulsejet?
Replies: 34
Views: 13362

re: Copper pulsejet?

Hi Larry,

See the attachment for a phase diagram of copper / aluminum alloy.

Continued heating cycles will produce precipitates that harden and strengthen the alloy.

Al Belli
by Al Belli
Fri Sep 08, 2006 6:07 pm
Forum: Valveless pulsejet forum
Topic: K-PT 07c thrust fix -- K-PT 07X release
Replies: 21
Views: 9557

re: K-PT 07c thrust fix -- K-PT 07X release

Hi Larry,

See-Saw in German is " schaukel "

Al Belli
by Al Belli
Fri Sep 01, 2006 8:04 pm
Forum: Valveless pulsejet forum
Topic: Prettiest FWE (?) - the 'Lady Anne Boleyn'
Replies: 133
Views: 88710

re: Prettiest FWE (?) - the 'Lady Anne Boleyn'

Hi Larry,

Don't You ever eat sardines; and get " baited " breath. :)

"Bated breath" has been around a long time. Here's the first cite in the Oxford English Dictionary: "1596 Shakespeare, Merchant of Venice i. iii. 125 'With bated breath, and whispring humblenesse.'"



Al Belli
by Al Belli
Mon Aug 21, 2006 4:20 pm
Forum: Tools and Construction
Topic: Uflow usable for pulsejets?
Replies: 16
Views: 11776

re: Uflow usable for pulsejets?

Hi Najm,

Here's the Zipped file in the attachment.

Al Belli
by Al Belli
Sat Aug 19, 2006 9:49 pm
Forum: Tools and Construction
Topic: Has anyone used a STITCH Welder?
Replies: 62
Views: 31675

re: Has anyone used a STITCH Welder?

Hi,

A commercially made stitch welder is inexpensive, see:

http://www.automotivesquare.com/sku19045.html


Al Belli
by Al Belli
Tue Aug 15, 2006 1:41 pm
Forum: Off topic forum
Topic: Speed of sound
Replies: 7
Views: 2757

re: Speed of sound

Hi Zippiot, Is sea level of the Atlantic and Pacific oceans the same? If so why are locks required in Panama? Sea level is about 20 cm higher on the Pacific side than the Atlantic due to the water being less dense on average on the Pacific side and due to the prevailing weather and ocean conditions....
by Al Belli
Sat Aug 05, 2006 6:45 pm
Forum: Off topic forum
Topic: How much power is needed to spin a radial compressor?
Replies: 10
Views: 3702

re: How much power is needed to spin a radial compressor?

Hi,

The formula for horsepower required to compress air is:

Horsepower = 0.2267 x CFM (( PSI/14.7 +1) raised to the 0.283 power -1))

An example:
A compressor moving one pound of air a second and giving 8.8 PSIG
will require 25.3 Hp.

Al Belli
by Al Belli
Fri Jul 28, 2006 12:31 pm
Forum: Valveless pulsejet forum
Topic: Small.... copper pulsejet, some questions.
Replies: 7
Views: 2954

re: Small.... copper pulsejet, some questions.

Hi Mark van Werven ,

Go to the pulsejet section of this site, and download the calculator V1.4

Eric Beck Lockwood/SNECMA beta version- valveless .


Al Belli
by Al Belli
Fri Jul 28, 2006 12:26 pm
Forum: Valveless pulsejet forum
Topic: Small.... copper pulsejet, some questions.
Replies: 7
Views: 2954

re: Small.... copper pulsejet, some questions.

Hi Mark van Werven ,

Go to the pulsejet section of this site, and download the calculator V1.4

Al Belli
by Al Belli
Sun Jul 23, 2006 7:32 pm
Forum: Off topic forum
Topic: Insanity test
Replies: 5
Views: 2434

re: Insanity test

Hi,

That audio, in the insanity test ,really brings back memories of my SAAB-93

Al Belli
by Al Belli
Wed Jul 19, 2006 2:24 pm
Forum: Off topic forum
Topic: Nature's Children
Replies: 697
Views: 183979

re: Nature's Children

Hi, The tree must be a Pussy Willow !!! Salix caprea, French Pussy Willows are large upright growing shrubs or multi-stemmed small trees. The large, fuzzy, silvery catkins open in late winter or very early spring. A Great plant for winter stems to force the buds to bloom for flower arrangements. Pre...
by Al Belli
Tue Jul 11, 2006 1:46 pm
Forum: Ramjet forum
Topic: Motorjet
Replies: 56
Views: 46632

re: Motorjet

Hi,

I don't know of anything that will withstand the high temperatures.

Al Belli