Search found 9 matches

by RMMK
Mon Jul 21, 2014 8:33 pm
Forum: Valved pulsejet forum
Topic: Units used in Calculator
Replies: 3
Views: 2253

Re: Units used in Calculator

Thanks! :lol:
by RMMK
Sun Jul 20, 2014 9:38 pm
Forum: Valved pulsejet forum
Topic: Units used in Calculator
Replies: 3
Views: 2253

Re: Units used in Calculator

in the Eric Beck's calculator in .xls file i still cant understand the units of thrust! Is the kgs signify Newtons or is it kilogram-force (kgf)............. Plz reply!

Thanks
by RMMK
Sun Feb 23, 2014 4:42 pm
Forum: Valved pulsejet forum
Topic: Units used in Calculator
Replies: 3
Views: 2253

Units used in Calculator

I built an engine using Eric Beck calculator for the same and found it working satisfactorily! But the thing is I have been wondering that the units used were written in the thrust row as lbs and kgs which i find somewhat difficult to understand as commonly we use for Force the units of kgf and lbf ...
by RMMK
Sun Jan 05, 2014 4:49 pm
Forum: Valved pulsejet forum
Topic: My First Valved Pulse Jet
Replies: 5
Views: 2474

Re: My First Valved Pulse Jet

It works! Its buzzing! WoW! thanks...opening the gap did the trick.... but it seems like I was also spraying a very small amount of fuel! :lol:
by RMMK
Fri Jan 03, 2014 5:24 pm
Forum: Valved pulsejet forum
Topic: My First Valved Pulse Jet
Replies: 5
Views: 2474

Re: My First Valved Pulse Jet

No! The fuel does not ignite! Well my ignitor should provide round about 8 sparks per second (8 Hz freq.) with 66% duty cycle!
by RMMK
Fri Jan 03, 2014 4:26 pm
Forum: Valved pulsejet forum
Topic: My First Valved Pulse Jet
Replies: 5
Views: 2474

My First Valved Pulse Jet

Well I built my first 10lbs Valved Pulse jet following the design calculations of Eric Beck Calculator..... I have used the aspirated engine approach! When I tried to start the engine by blowing air inside using an air-blower, powered on the spark plug through a driving circuit based on an automobil...
by RMMK
Thu Nov 28, 2013 6:32 am
Forum: Valved pulsejet forum
Topic: Air Tight
Replies: 1
Views: 1121

Air Tight

I am unsure whether the pulse jet needs to be airtight without any small openings between the combustion chanmber and the head assembly.... I think using flanges might also result in small space?? Is it okay or should it be completely closed because of we blow air inside for starting the same some a...
by RMMK
Wed Sep 11, 2013 11:53 am
Forum: Valved pulsejet forum
Topic: Material Thickness
Replies: 3
Views: 1669

Re: Material Thickness

I use muffler pipe and EMT electrical conduit for building engines. I'm not sure of the thickness maybe .060". It takes some practice to weld it with my a stick welder using my old 1970s Lincoln Welder. But this way the pulse jet will weigh more than 2 kgs which will make life difficult for me as I...
by RMMK
Wed Sep 04, 2013 6:21 pm
Forum: Valved pulsejet forum
Topic: Material Thickness
Replies: 3
Views: 1669

Material Thickness

I was planning on building a 25lbs Valved Pulse Jet Engine but couldnt figure out how much thick should the tail pipe and the combustion chamber be? Can I use a #25 Gague Mild Steel Sheet rolled out for my given diameter for the same purposes? Will it be enough?? Plz help! Also this one will not be ...