Search found 557 matches

by Al Belli
Sun May 16, 2004 10:20 pm
Forum: Tools and Construction
Topic: a million 12 volt fuel pumps...which one to choose??
Replies: 13
Views: 5880

Spray nozzles

Mike,
I've been meaning to try the PJ series BETE nozzles. Have You used them, and if so, how did You like them ?

Al Belli
by Al Belli
Sun May 16, 2004 3:00 pm
Forum: Tools and Construction
Topic: a million 12 volt fuel pumps...which one to choose??
Replies: 13
Views: 5880

Fuel pump

I am using an automotive fuel pump for my tests using gasoline. The pump is for a Ford 4, 6, or 8 cylinder engine from 1983 to 1991. The pump is available at Autozone for $76.00, or You can scout the auto scrapyards for a used unit. The pump is a Master E-2000 gearotor type, and will produce in exce...
by Al Belli
Sat May 15, 2004 3:24 pm
Forum: Tools and Construction
Topic: a million 12 volt fuel pumps...which one to choose??
Replies: 13
Views: 5880

Windshield washer pumps

I have used Windshield washer pumps for methanol fuel, but the pump fails almost instantly on gasoline !

Al Belli
by Al Belli
Thu May 13, 2004 8:02 pm
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Schelkin spiral

Hi Bruno,

I wasn't thinking detonation, but I thought the use of the coil might help to accellerate the exhaust out the tailpipe and improve thrust.

Al Belli
by Al Belli
Thu May 13, 2004 7:28 pm
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Schelkin spiral or coil

Hi Mark,

Here's some info from a deflagration to detonation transition paper from Caltech. The Schelkin spiral used in the test of this 1 1/2" Dia. tube ( 5' l.)is 12" long x 1 1/2" od x 7/16" pitch, and is made from 5/32" Dia. wire.

Al Belli
by Al Belli
Thu May 13, 2004 12:44 pm
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Russian engineering

Bruno,

Your story reminds Me of the American engineers laughing at the vacuum tube electronics in the MIG fighter; until they realised that the vacuum tube electronics were used to provide EMP protection in the event of an atomic blast !

Al Belli
by Al Belli
Thu May 13, 2004 12:22 pm
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Shelkin coil

Has anyone tried adding a Shelkin coil to a pulsejet at the combustion chamber entrance to the tailpipe, and if so, how did it affect the performance of the pulsejet ?

Al Belli
by Al Belli
Thu May 13, 2004 12:17 pm
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Turbulators

Model airplane gliders have been using turbulator strips applied to the upper surface of the leading edge of the wing for many years. A thin nylon monofilament streached spanwise at the leading edge, spaced about 2 to 3 MM above the top surface has proven quite effective in improving lift. The " str...
by Al Belli
Thu May 13, 2004 11:58 am
Forum: Off topic forum
Topic: whale flippers may improve airplane wing design
Replies: 11
Views: 3652

Lumps & Bumps

Whwn I worked at the US Rubber research center during the early 1960's,we were experimenting with a rough surfaced material patterned after the skin surface of a shark. The material was applied to an instrumented boat, and various bump shapes were evaluated. There was a significant drag reduction ef...
by Al Belli
Thu May 06, 2004 8:25 pm
Forum: Off topic forum
Topic: Playing with proportions
Replies: 11
Views: 3804

McGraw-hill book

by Al Belli
Thu May 06, 2004 7:07 pm
Forum: Off topic forum
Topic: Playing with proportions
Replies: 11
Views: 3804

Treager's book on E-bay

Alan,
This has a buy-it-now price of $45.00
A very good value for the amount of information it contains !

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... eName=WDVW

Al Belli
by Al Belli
Thu May 06, 2004 12:53 pm
Forum: Off topic forum
Topic: Playing with proportions
Replies: 11
Views: 3804

Turbojet

A very ambitious project indeed !! For an axial flow turbojet, Your compressor should give about 22 Psig. with a resulting thrust of about 17 pounds per inch of tailpipe area, assuming a compression ratio of 1.2:1 per stage. These estimated values assume that Your compressor is properly designed. I ...
by Al Belli
Wed May 05, 2004 12:06 pm
Forum: Off topic forum
Topic: Electric motors - any ideas?
Replies: 8
Views: 3112

Motor horsepower

Hi ,

1 Hp. = 746 Watts
3Kw. = 4 Hp.
2 Kw. =2.7 Hp.

Al Belli
by Al Belli
Tue Apr 27, 2004 8:27 pm
Forum: Valved pulsejet forum
Topic: Need Simple Pulse-Jet body
Replies: 22
Views: 12016

Balancewheel

In answer to Your questions: Do you know if the change in balance wheel spoke design came about at the same time? Do you know if there is a proper name for it? There is no apparent connection between the Incabloc bearing and the spiral spoked balancewheel. The balancewheel design predates the Incabl...
by Al Belli
Tue Apr 27, 2004 12:20 pm
Forum: Valved pulsejet forum
Topic: Need Simple Pulse-Jet body
Replies: 22
Views: 12016

Incabloc

The bearing suspension system called Incabloc is the shock reducing system used to support the staff that the balancewheel rotates on. The shape of the balancewheel shown in the above listing, was used to reduce the temperature expansion and distortion of the balancewheel to improve the timing accur...