Search found 125 matches

by multispool
Mon Nov 28, 2011 7:32 pm
Forum: Valveless pulsejet forum
Topic: More in the saga of Thermo-Jam ( and other musings )
Replies: 30
Views: 12625

Re: More in the saga of Thermo-Jam ( and other musings )

Thanks for the detailed explanation...
by multispool
Sun Nov 27, 2011 8:01 pm
Forum: Valveless pulsejet forum
Topic: More in the saga of Thermo-Jam ( and other musings )
Replies: 30
Views: 12625

Re: More in the saga of Thermo-Jam ( and other musings )

Hi Ghrey,

Do you test at random? Just wondered why you always use what seems like an over-small diameter tailpipe
Logic would say that this will behave like a breather tube rather than a resonating tail section, is that deliberate?

Anyway thanks! I do find this thread interesting/entertaining...
by multispool
Fri Nov 11, 2011 10:34 pm
Forum: Gas turbine forum
Topic: Turbo jet plans
Replies: 17
Views: 12547

Re: Turbo jet plans

Thread title says plans, Just wondering what planning has been done? Would be interested in what calculations you have done? Don't forget that with an axial Compressor stage, the pressure rise is created by diffusion, which is something that needs calculating for any chance of working. Basically it ...
by multispool
Sun Aug 23, 2009 10:18 am
Forum: Valveless pulsejet forum
Topic: Collected works of F. H. Reynst
Replies: 9
Views: 3260

Re: Collected works of F. H. Reynst

Kirk, Felt I needed to warn you that it's a rediculously high price! I have the hard back version, the original price in the states in 1961 was $15. I got mine about 8 years ago from a bookseller, Can't remember exactly, think it was about 20 GBP so it's value hasn't increased dramatically. Very int...
by multispool
Sat Jun 07, 2008 9:27 am
Forum: Valveless pulsejet forum
Topic: Interested ?
Replies: 248
Views: 36578

Re: Interested ?

You know! Foolish me thought I would offer at least a helping hand and expect some civility in return, but reality strikes back with the usual itemised list of negative statements. it is this very reason why I only post on this forum very rarely now... Moderators, Please ban this guys ip! On all oth...
by multispool
Fri Jun 06, 2008 8:43 pm
Forum: Valveless pulsejet forum
Topic: Interested ?
Replies: 248
Views: 36578

Re: Interested ?

Just been reading through this! Apart from the total inexcusably bad behaviour of some thread paticipants, there is a lot of variables that seem to have been ignored. No tests along these lines could be considered acceptable as even mildly "scientific comparison". Different climates, air and wind co...
by multispool
Wed Mar 19, 2008 6:55 pm
Forum: Gas turbine forum
Topic: Hi, change planes turbine
Replies: 4
Views: 2627

Yes it seems odd that someones collecting plans without wanting to pay for them! as Paul said they are all copyright and thats including the KJ66 plans that are illegally upload here for free download...
by multispool
Sat Jan 12, 2008 1:41 am
Forum: Gas turbine forum
Topic: Heppner turbine
Replies: 5
Views: 3388

Hi Bruno, Well, apparently those contra rotating types were built at some time and they gave good compression ratio, Probably faded into obscurity due to their over complex nature! Here is another weird design for you and Viv to drool over! http://www.geocities.com/gearturbine He mentions on one pag...
by multispool
Sat Dec 15, 2007 5:39 pm
Forum: Gas turbine forum
Topic: Heppner turbine
Replies: 5
Views: 3388

Must admit, have never heard anyone mention him!
There is a small reference to him here:
http://www.wolfhound.org.uk/

Seems he was a gas-turbine engineer at Armstrong Siddeley, last heard of in Montreal!
by multispool
Thu Dec 06, 2007 10:54 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 379
Views: 122248

Hi Mike,
I hope you don't mind, I did a quick render of the two shapes. I have to say, Linear's hold a fascination with me. They just look so right...

Wouldn't even like to think of attempting to model the flows in that twin inlet one though!
by multispool
Thu Sep 27, 2007 3:11 pm
Forum: Off topic forum
Topic: The shame of British bureaucracy at its worse
Replies: 0
Views: 1533

The shame of British bureaucracy at its worse

What is our world coming too?? Click the link below and please also pass the message on. Subject: Red Arrows The world-famous Red Arrows have been banned from appearing at the 2012 London Olympics because they are deemed 'too British'. Organisers of the event say that the Arrows military background ...
by multispool
Fri Jul 27, 2007 10:02 am
Forum: Valveless pulsejet forum
Topic: Logan
Replies: 6
Views: 3097

Ah, the throat is at 25% so its a crooked linear (my colourful description). CG: No intentional direction on this. More a case of playing, and seeing where it leads. Hope to end up with a nice cross section of medium to small VPJ types. Of course, a Pressure gain Burner would be very nice and a (qui...
by multispool
Thu Jul 26, 2007 2:24 pm
Forum: Valveless pulsejet forum
Topic: Logan
Replies: 6
Views: 3097

Thanks very much for the dims. I can probably make it easier out of STA so when I get back home next week will make it up and see what it runs like!

I have no interest in thrust so will keep the side port straight!

Are your pipe diameter measurements internal?
by multispool
Thu Jul 26, 2007 11:11 am
Forum: Valveless pulsejet forum
Topic: Logan
Replies: 6
Views: 3097

Hi Mark,
A second search revealed your small side port engine, Was this sustainable without forced air? if so would you be prepared to reveal dims?
by multispool
Thu Jul 26, 2007 8:18 am
Forum: Valveless pulsejet forum
Topic: Logan
Replies: 6
Views: 3097

Logan

Done a search but can't locate any working drawings of a Logan
Can anyone help please?