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thermojet
Posted: Tue Jan 02, 2007 8:51 pm
by leo
Nice engine, it probably isn’t that loud because of the small inlets.
I you make them bigger it will be louder for sure.
Or put some more on it, a total of four or maybe six of that size will run I think.
Don’t do that only on my advise, I don’t guarantee anything!.
xxx
Posted: Wed Jan 03, 2007 12:23 am
by Jim Berquist
Meg: Your big one looks clean. Another one is born!!!! HAAA!
Jim
What is the overall length of that one?
Posted: Thu Jan 04, 2007 5:02 pm
by mag
Hey Guys, got me a new bottle today and tuned the regualtor a bit and now im getting full power out of the engine. Thrust must be between 6 to 8 kg, It was pushing the rim over the floor a bit! And damn, now it IS loud...
Can anyone estimate the frequency of both runs please? I flared the intakes today and added a starting air line.
So, have fun with the vid!
xxxx
Posted: Thu Jan 04, 2007 7:19 pm
by Jim Berquist
MAG: Looks Good! Sound and running like a different animal now! It looked like your air line may have been effecting the one intake a little.
What is the overall lenght of it?
What are you going to do with it? Use it as a test bed? Practical?
I see you retired STOOLIE!
Jim
thermojet
Posted: Thu Jan 04, 2007 11:00 pm
by leo
Cool running!.
Your first underpowered run was 124 HZ.
The last run gives 131 HZ.
xx
Posted: Thu Jan 04, 2007 11:40 pm
by Jim Berquist
leo: what program are you using?
jim
HZ count
Posted: Fri Jan 05, 2007 12:04 am
by leo
Jim.
If I want to do a quick HZ count, I use the demo version of DesktopRTA.
You can download it here.
http://www.4pockets.com/product_info.php?p=48
for more analysing I use other Programz.
Posted: Fri Jan 05, 2007 12:50 am
by Eric
Very nice! I should be able to finish the big 5.5" tailpipe thermo in a week or so. :)
Eric
Posted: Fri Jan 05, 2007 8:10 am
by mag
WHAT? 5,5" TAILPIPE??? You must be insane man! Thats going to be a big engine man!
Jim, length is the length on eric´s plan x1,8
sound
Posted: Fri Jan 05, 2007 3:55 pm
by Jim Berquist
I have the RAL program, but it will not run on this Toshiba....I down loaded Visual Analyser 8 but have not yet mastered the funtions on it yet.
Eric: 5.5" You could BB-Q a turkey with that one!!!!!!!!
Jim
Posted: Sat Jan 06, 2007 2:11 am
by Eric
5.5" is nothing :)
I have a 20" diameter 1/4" wall steel pipe about 20' long that is waiting to be turned into a pulsejet :D
I am thinking that maybe I should just permanantly convert the 300 pounder valved engine into a thermojet, or maybe a straight tailed chinese. Its a little short for a chinese, the thermojet may work better, but the combustion chamber angle is not great enough to effectively use 2 intakes. As a valved engine it is just too damn loud and uses about 10 bucks of spring steel for the valves which it eats like crazy.
Heres a pic of the monster, and a little dynajet for size comparison, has about 2" of clearance from the ceiling.
Eric
Posted: Sat Jan 06, 2007 11:54 am
by mag
NICE! What kind of valve grid did you use for this one? That thing must be loud as hell! My little valved was louder then my big thermojet so yours must be hell!
I made plans for a valved engine with about 15cm cc dia. With an Argus grid (real argus grid, made from several parts and bolted together, like the one on the solar engine) but havent found anyone who mills the parts for not too much money.
P.S. do you have a vid of it running?
Posted: Sat Jan 06, 2007 6:55 pm
by Eric
It has a double V valve grid, no video of it, i had a sony cd cam at the time and could no longer get cds for a while when they decided to stop making them. Hearing protection does jack, even with ear plugs and ear muffs, your body absorbs so much sound that you just hear it through your body and not your ear canals. Plus it eats the valves like crazy and uses about 4' of spring steel a shot. I didnt order more of the heavy spring steel to replace the valves and as a valved engine its just too loud. Makes one hell of an echo though, whole bunch of people though a plane was crashing.
Eric
Posted: Sun Jan 07, 2007 7:47 pm
by Jim Berquist
Thats the one I want on my 16ft john boat!!!! I could shock the fish to the serfice and just scoop them up! NOT!! That was a big mama!! To bad we can't come up with a better valve system! How long did the valves last? One hour? One one 1/3 that size on the snow board could be wild!
jim
Posted: Mon Jan 08, 2007 12:43 am
by francisco
hello to all
this it is my new creation of Sunday
it is a copied thermalpulse of 3lb of eric
it has finished it hardly for 30 minutes, here it is 10pm o'clock
therefore I won't light it today
the truth me to side to weld the entrance,hehehe, but I believe q it won't lose over there ...
some pictures! !
(tomorrow I hope to give him it goes! , (if I don't have a lot of work). . . . )