Search found 1241 matches

by hinote
Tue Jun 29, 2010 9:41 pm
Forum: Off topic forum
Topic: suspect your electric (in tank) fuel pump
Replies: 41
Views: 8738

Re: suspect your electric (in tank) fuel pump

Noticed the wifes S-10 is skipping a few beats at low acceleration, will check the ignition system with a timing light tonight, if it tests clean it is most likely the fuel pump. Mileage has also been decreasing with the engine putting off a rich smell from the exhaust, another sign that points to ...
by hinote
Wed May 12, 2010 8:12 pm
Forum: Tools and Construction
Topic: I tried to cast aluminum last week
Replies: 8
Views: 3620

Re: I tried to cast aluminum last week

Besides the things you´ve pointed out I should have guessed that the teflon coating in the pie shape would burn and cause cavities, but it was only a primary test and did indeed inspire us to make a more serious attempt later with an oil burning forge and better quality aluminum Be careful At 680°F...
by hinote
Sun Apr 25, 2010 9:09 pm
Forum: Valveless pulsejet forum
Topic: Acoustic length
Replies: 13
Views: 3740

Re: Acoustic length

I'm no acoustic engineer, but I think the accurate calculation of acoustic length for a pulsejet must be a pretty complex business, because of the wildly changing conditions in the pipe during even a single cycle. Larry: You've nailed it pretty good there. Dwayne: If you're capable of asking questi...
by hinote
Mon Apr 19, 2010 4:37 pm
Forum: Tools and Construction
Topic: UFLOW and Helmholtz
Replies: 7
Views: 3087

Re: UFLOW and Helmholtz

This chart is from essential reading thread, it plots combustion time to diameter: I'm glad you've found that chart and have observed its importance. You'll find that it constrains how short a pulsejet can be relative to its diameter. The length of the pulsejet is the primary driver of frequency an...
by hinote
Thu Mar 25, 2010 6:43 pm
Forum: Off topic forum
Topic: suspect your electric (in tank) fuel pump
Replies: 41
Views: 8738

Re: suspect your electric (in tank) fuel pump

Hi Forrest Intermittent problems seem to love you and naturally collect around you ;-) Does your Mum's car have a diagnostic port? Viv Here's a few tips from a car guy ( I did service writing and managing in the late '90's): 1. All cars sold in the US starting in '96 are OBD II spec; among other th...
by hinote
Fri Feb 19, 2010 5:54 pm
Forum: Valveless pulsejet forum
Topic: Kraken
Replies: 44
Views: 12171

Re: Kraken

Started construction on the Kraken. Two (ported) 6.75"dia. CCs pusing a 4.25"dia main tailpipe. Looks like a fun and challenging project. Good luck with it! Maybe I can pass along some tips and save you some grief, with the following: 1. You really need to flare the intakes and both ends of the int...
by hinote
Sat Feb 13, 2010 7:24 pm
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 716048

Re: More free plans: 40 pound Thermojet

Hi Metiz On another topic your weld beads look much improved ;-) good work Viv Not totally sure I agree here. I'm not trying to stir up trouble--but it looks as though your welds are not penetrating the base metal by very much. For max strength they SHOULD. Have you tried making a weld sample and t...
by hinote
Fri Feb 12, 2010 10:40 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80901

Re: Calculating top speed on ice...

If the intake length is so tied up with the tailpipe length, will thermal expansion during running not mess up this fine balance? I believe the engine must be designed for its operating temps. Metal expansion is one important reason these engines don't start right up from cold; another is the need ...
by hinote
Wed Feb 10, 2010 10:41 pm
Forum: Valveless pulsejet forum
Topic: Would this work? Project: BenJet XL 0.1
Replies: 35
Views: 9472

Re: Would this work? Project: BenJet XL 0.1

Hi and welcome to the forum! No offence but you just made the "Beginner Mistake 1A" by starting to figure out a groundbreaking new and completely untried engine without any previous experience. I´ve seen it on many different forums and I´ve made it myself once or twice before I started reading up o...
by hinote
Sat Jan 16, 2010 6:12 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80901

Re: Calculating top speed on ice...

HI again: I just had a thought: It would be pretty simple to modify that head-end plate into a sealed reservoir, which would absorb considerable heat from the combustion chamber. This would provide quite a lot of the necessary heat input for vaporization. A couple turns around the outside on the way...
by hinote
Sat Jan 16, 2010 6:04 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80901

Re: Calculating top speed on ice...

You have a point there, do you know if the SNECMA engines were direct injected or used vapourisors? Pretty sure they were direct. Of course there would still be ways to raise the temp of the fuel along the way--right? This would reduce the need for heat extracted from the interior of the engine. I ...
by hinote
Sat Jan 16, 2010 4:08 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80901

Re: Calculating top speed on ice...

Thanks! Actually I am not sure what fuel I will run her on, diesel would be the safest fuel but I will also try gasoline and E85 just to find out which one is the best. It's worth noting here that both the German Argus pulsejet used on the V1 flying bomb and the SNECMA efforts in valveless engines,...
by hinote
Thu Jan 07, 2010 1:13 am
Forum: Valveless pulsejet forum
Topic: Varying the thust in a pulsejet
Replies: 3
Views: 1774

Re: Varying the thust in a pulsejet

Well, this is fortunate-- I've been working on some fiction stories where valveless pulsejets play a fairly major role, but haven't been able to find out one answer while doing research: Can they be throttled? Is it possible to increase or decrease the thrust of a pulsejet, or are they pretty much ...
by hinote
Thu Dec 31, 2009 2:50 am
Forum: Gas turbine forum
Topic: Need Plans for Turbo Charger Jet Engine
Replies: 12
Views: 4233

Re: Need Plans for Turbo Charger Jet Engine

Did a search for DIYgasturbines found a photo posted there 16 years ago. Only information is him running the engine at different RPMs. Did a search for more information. There is no information to be found. I did search for turbo charger and turbo jet engine all it finds is this forum with all the ...
by hinote
Tue Dec 22, 2009 9:38 pm
Forum: Off topic forum
Topic: The ElectraFlyer C plug-n-fly electric plane
Replies: 10
Views: 2518

Re: The ElectraFlyer C plug-n-fly electric plane

Agreed, far less heat than IC. So 90% efficiency gets you 10% of power going out as heat plus I^2*R, which I neglected to mention. So if you know the resistance of the motor windings, and the amperage, you get X watts out as heat. Faaaascinating. Hi Mike Plus the loss in the motor control power out...