Search found 17 matches

by madmike
Thu Jun 15, 2006 1:00 am
Forum: Valveless pulsejet forum
Topic: Starting a Pulsejet at midnight in Zürich
Replies: 7
Views: 3448

Re: re: Starting a Pulsejet at midnight in Zürich

Here my Propane-Tanks:[/quote]

Now if only we could figure out how to hold one of these upside down.......Let's see if we can calculate the size of the jet it would feed. :shock:
by madmike
Fri Dec 30, 2005 10:03 pm
Forum: Rocket forum
Topic: Rcandy Aerospike
Replies: 24
Views: 11034

re: Candy rocket rules of thumb

After you reground the knos/sugar mix for maximum surface area for your maximum burn rate, did you just fill your motor chamber or did you press it in firmly? P.S. Even though these guys hijacked my thread for this off shoot of a subject. I still can learn new stuff. Feel free to do it anytime.I don...
by madmike
Fri Dec 23, 2005 5:39 pm
Forum: Rocket forum
Topic: Candy rocket rules of thumb
Replies: 4
Views: 4946

Candy rocket rules of thumb

Can anyone shed some info on the design of candy rockets? ; I don't mean the fuel reciepes, but the design of the basic diameter and depth of the hollow core inside of the fuel in relationship to the motor's diameter and length.
by madmike
Fri Dec 09, 2005 8:15 pm
Forum: Off topic forum
Topic: Another (Crazy?) Idea for Engine Kits
Replies: 78
Views: 44357

Re: re: Another (Crazy?) Idea for Engine Kits

Dang911 wrote:.

Its 80 today..........boohahahaha
WE just got 12 inches of SNOW today. BTW , have you polished any rust/humidity off your tools and projects lately? HeeHeeHee your temp does indeed make me jealous though. Lucky you, I'd rather polish rust than scrape ice! have a warm day. mike
by madmike
Mon Dec 05, 2005 11:03 pm
Forum: Valveless pulsejet forum
Topic: Article - Good Enough for Wikipedia?
Replies: 32
Views: 10485

re: Article - Good Enough for Wikipedia?

a few mentions of "explosions" for the explaination, from my pyrotechnic dabblings, Shouldn't these be called deflagrations or something to that effect. I'm no scientist but doesn't the term explosion refer to something happening at a faster burn rate than those found on pulsejets (pulsejet ONE word...
by madmike
Mon Oct 31, 2005 9:59 pm
Forum: Valveless pulsejet forum
Topic: Propane Regulator
Replies: 3
Views: 1486

re: Propane Regulator

What mike says is true. But for what it's worth if you are just curious or you are using whatever you have on hand, I use a regulator off of an acetylene tank and it works very well. However, if you start flipping the tank for maximum fuel output, they (the reg.) tend to freeze up. That's where the ...
by madmike
Mon Oct 31, 2005 11:06 am
Forum: Valveless pulsejet forum
Topic: how do I measure thrust....simply?
Replies: 3
Views: 1282

re: how do I measure thrust....simply?

yessiree IT RUNS! It's about 38" long (1meter)with a 2" (50mm)tail pipe. Thanks for the encouragement. I HAVE read tons of post throughout this site. However, a lot of the most useful information is just like this post; while rambling on about one subject, the authors and respondants will jump to an...
by madmike
Sun Oct 30, 2005 4:42 am
Forum: Valveless pulsejet forum
Topic: how do I measure thrust....simply?
Replies: 3
Views: 1282

how do I measure thrust....simply?

I have build a 2X scale FWE styled pulse jet from Eric's plans and Larry's scaling info on this site. I would like to measure the thrust to tune it further. Anyone have any ideas to share? Is it simply a matter of getting a pulley arrangment on a wheeled sled of sorts to see how much weight it pulls...
by madmike
Sun Oct 16, 2005 9:41 pm
Forum: Valved pulsejet forum
Topic: easy to build pulsejet
Replies: 4
Views: 3455

re: easy to build pulsejet

Take Eric up on his suggestion utilizing his plan. I built a 2x scale FWE styled jet and had it running sweet after experimenting with starting it in about five minutes. It was an easy design to build utilizing sheetmetal and tin snips and a bunch a junk laying around. If your doing it as a school p...
by madmike
Sat Oct 08, 2005 2:31 pm
Forum: Valveless pulsejet forum
Topic: Can't seem to find "what's lime green with 300 #s of th
Replies: 10
Views: 2612

Can't seem to find "what's lime green with 300 #s of th

Still in the works or is it hidden too deep in the web?
by madmike
Thu Oct 06, 2005 10:02 pm
Forum: Valveless pulsejet forum
Topic: Recommeded method of fueling FWE with propane
Replies: 5
Views: 2092

re: Recommeded method of fueling FWE with propane

Thank you Steve. It appears to be just beyond where the flare ends. Is that just a wide open line? I.E nothing on the end, no pinch ? Looks like 4-5 mm in diameter. Correct? The memebers on this forum are some of the most helpful people I've ever dealt with. You all deserve a pat on the back. I will...
by madmike
Tue Oct 04, 2005 11:24 pm
Forum: Valveless pulsejet forum
Topic: Recommeded method of fueling FWE with propane
Replies: 5
Views: 2092

Recommeded method of fueling FWE with propane

I need a suggestion as I have completed my build! After a quick experiment, my eyebrows are intact but I'm missing some hair on my forearms! I know I need to add the slightest breeze of air to the intake but I'm a little in the dark as to proper propane delivery. I'm using a 100 lb tank (old style) ...
by madmike
Mon Oct 03, 2005 1:05 am
Forum: Valveless pulsejet forum
Topic: FWE intake length for a 2x sized engine ????
Replies: 2
Views: 1805

FWE intake length for a 2x sized engine ????

After numerous failures of my "made of junk stuff" lockwood. I've moved onto a FWE styled engine. After reading a couple hours of this forum I've decided that almost everyone has problems with just jumping into this wild and crazy "mad scientist" hobby except those of you who seem to take it more se...
by madmike
Sun Oct 02, 2005 9:32 pm
Forum: Valveless pulsejet forum
Topic: Larry's scaling Examples of FWE
Replies: 1
Views: 1133

re: Larry's scaling Examples of FWE

I just realized "L" is a percentage of the overall length. Thanks anyway!
by madmike
Sun Oct 02, 2005 7:46 pm
Forum: Valveless pulsejet forum
Topic: Larry's scaling Examples of FWE
Replies: 1
Views: 1133

Larry's scaling Examples of FWE

Larry, I previously asked about scaling up a FWE design and you provided an excellent chart/diagram for me to get started. One question though; on the dimensions given could you please explain what the numbers preceded by the "L" designation refer to? are they relative diameters to the lengths given...