Search found 16 matches

by astroadrian99
Sat May 24, 2014 6:31 pm
Forum: Valveless pulsejet forum
Topic: M500 build log
Replies: 161
Views: 52109

Re: M500 build log

Just wondering, do you happen to have any plans on this? It just looks awesome.
by astroadrian99
Wed May 14, 2014 7:31 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

No. scaling engines doesn't work like that. You can't just increase all dims x 2 and expect twice the thrust (or even a running engine) A nice ballpark to double thrust is to take a running engine and scale the diameter of the combustion chamber x1.4 (and then design the rest of the engine accordin...
by astroadrian99
Wed May 14, 2014 5:43 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

On thing, if I wanted to scale up an engines size, would the thrust scale up too. For example, if I were to get plans for an engine that has 10 lb of thrust and I decide to make it 10x the size the plans state, would the thrust increase to 100 lb?
by astroadrian99
Wed May 14, 2014 3:37 pm
Forum: Valveless pulsejet forum
Topic: "Thunderchine" 55 lb thrust pulsejet plans
Replies: 142
Views: 52870

Re: "Thunderchine" 55 lb thrust pulsejet plans

Hey, I was checking out the plans for this engine but I don't understand one thing, what's the splitter for and where does it go? Thanks I strongly suggest not building this engine. The tollerances are VERY tight and the slightest mistake will cause your engine to malfunction. Even if you build it ...
by astroadrian99
Wed May 14, 2014 12:11 pm
Forum: Valveless pulsejet forum
Topic: "Thunderchine" 55 lb thrust pulsejet plans
Replies: 142
Views: 52870

Re: "Thunderchine" 55 lb thrust pulsejet plans

Hey, I was checking out the plans for this engine but I don't understand one thing, what's the splitter for and where does it go? Thanks
by astroadrian99
Wed May 14, 2014 2:53 am
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

Hey, tufty I've been reading what you sent me over and over but I still don't understand what it's trying to say. It's just so complex. Could you explain it to me in simpler words please.
by astroadrian99
Tue May 13, 2014 4:08 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

Thanks man, for everything.
by astroadrian99
Tue May 13, 2014 11:28 am
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

I'm fairly certain Eric has moved to pulsejetengines.com (that's where his youtube channel is pointing these days, at least), so that's probably a decent way of getting in touch with him. He's not been online here for a good while. Ok I'll try to contact him there. In the mean time, I have one ques...
by astroadrian99
Mon May 12, 2014 7:57 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

So wait, are they more fuel efficient than the Chinese design? Well, the models made, tuned, tested and run by SNECMA got a TSFC of ~1.8. That's pretty damn good, and it's for an engine designed to put out the sort of thrust you want. The "Chinese" design will get you TSFC around 2, and you'll have...
by astroadrian99
Mon May 12, 2014 3:34 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

When talking pulsejets, "fuel efficiency" should always be in "ironic" quotes. As far as fuel efficiency on big engines goes, SNECMA's "Ecrivisse" was ~100lb thrust with a (heavily tested / proven) TSFC of 1.8 or so. I'm fairly certain there's some engineering drawings for the Ecrivisse lying about...
by astroadrian99
Sun May 11, 2014 11:12 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

Check the looking for plans section. Im sure you will find what you need there. Alternatively search for thunderchine or lockwood or m40... Which 12 lb engine are you going to build? I am starting with Larry's original short lady just because it looked easy to build. I have a thread running documen...
by astroadrian99
Sun May 11, 2014 11:09 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

Check the looking for plans section. Im sure you will find what you need there. Alternatively search for thunderchine or lockwood or m40... Which 12 lb engine are you going to build? I am starting with Larry's original short lady just because it looked easy to build. I have a thread running documen...
by astroadrian99
Sun May 11, 2014 10:31 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

sid_raptor wrote:Also i think its easier to start small....just to learn the ropes!
Ok, I'll start small with some 12lb thrust i found yesterday. Just one thing, do you happen to have the link for the 50 pound engines?
by astroadrian99
Sun May 11, 2014 10:21 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

oh and take a look here. They are talking about smaller engines than what you are looking for but i think it will answer your questions about efficiency... http://www.pulse-jets.com/phpbb3/viewtopic.php?f=3&t=6312&p=74376&hilit=thunderchine#p74376 Ok thanks man. Ill check it out. Honestly, i still ...
by astroadrian99
Sun May 11, 2014 7:36 pm
Forum: Valveless pulsejet forum
Topic: Most fuel efficient engine
Replies: 25
Views: 8403

Re: Most fuel efficient engine

Hello? Anybody there?