Search found 67 matches

by pablo
Mon Sep 05, 2011 9:34 pm
Forum: Valveless pulsejet forum
Topic: russian valveless uavs ´(link)
Replies: 0
Views: 1460

russian valveless uavs ´(link)

hi everyone, it's been a while since i last was here so this might has been posted already. still very interesting!
http://www.missiles.ru/foto_MAKS-2007_enics.htm
one more pic can be found:
http://englishrussia.com/2011/09/05/the ... ft-models/

pablo
by pablo
Tue Dec 30, 2008 3:34 am
Forum: Gas turbine forum
Topic: BB life in TT turbine
Replies: 3
Views: 2272

Re: BB life in TT turbine

ok, thanks for the answer. I will try and see how it goes.

nope, haven't read them. Will have to do it.
I still have to solve the lubrication problem, cos the bearings needed a bit of "help" to come out, so other misterious parts (and pieces) came out of from the turbo, hehe,

Pablo
by pablo
Sun Dec 21, 2008 1:00 am
Forum: Gas turbine forum
Topic: BB life in TT turbine
Replies: 3
Views: 2272

BB life in TT turbine

hi everyone. I've started builiding a TT turbine to waste some time, but the (hydrodynamic) bearings of it are useless. So i removed them and will be changing em with STANDARD 6 mm ID, 13 mm OD ball bearings. in the skf webpage it says "reference speed: 110000". but it sounds too optimistic to me. i...
by pablo
Wed Dec 05, 2007 4:27 pm
Forum: Valveless pulsejet forum
Topic: spare parts, ideas?
Replies: 2
Views: 1371

thanks!
by pablo
Tue Dec 04, 2007 12:51 am
Forum: Valveless pulsejet forum
Topic: spare parts, ideas?
Replies: 2
Views: 1371

spare parts, ideas?

it's been a while since i last played with pjets, but i found a nice cone at the uni's workshop and i thought it'd make a nice pjet. it's 23 cm (lenght), D=11 cm, d=5 cm the most suitable tube i could find for it is 5,5 cm i tried scalling linearly an advance FWE (the old, simple version) but i foun...
by pablo
Fri Apr 27, 2007 8:36 am
Forum: Gas turbine forum
Topic: KJ-66 model build project
Replies: 42
Views: 34509

saugumas wrote:Hi,
Rossco and glop, I am planing to run tubojet CFD simulation on ANSYS, can you share your model? :)
I will post results here.
how do you convert the autocad/solid/ or wathever cad soft file into a mesh fileb (for CFX)?
by pablo
Tue Jan 09, 2007 7:19 pm
Forum: Rocket forum
Topic: Fast Sugar Propellant
Replies: 37
Views: 21573

i get a good working time with the 100 gr nitrate, 30 gr sugar and 30 gr glucose recipe, you can handle the fuel without gloves and still leaves enough time to make the hole with a stick or something.

pablo
by pablo
Sun Dec 31, 2006 7:09 pm
Forum: Gas turbine forum
Topic: Vacume cleaner turbine?
Replies: 9
Views: 5988

yep, just having some fun. :) today i closed the big holes and it started burning in the right place and i think it even increased the speed (it started to sound as if the revs were higher) unfortunately my cheap bearings didn't like the lack of lubricating system and high temp. so i took a new one ...
by pablo
Sun Dec 31, 2006 3:45 am
Forum: Gas turbine forum
Topic: Vacume cleaner turbine?
Replies: 9
Views: 5988

this might help or at least give you an idea

http://www.enjoysky.com.cn/jet/tuzhi/fd3-64.pdf

it's the fd3 book (unfortunately in chinese), but some parts in english

Pablo
by pablo
Sun Dec 31, 2006 12:00 am
Forum: Gas turbine forum
Topic: Vacume cleaner turbine?
Replies: 9
Views: 5988

funny! i was working on something similar this week, and i tried it this morining. in my vac cleaner the compressor was also used to cool the engine, so i had to make a NGV and the turbine out of sheet metal (like fd3) the result is really crappy, so i doubt it'll work. anyway, when i lit it this mo...
by pablo
Wed Jul 12, 2006 11:16 pm
Forum: Rocket forum
Topic: Sorta crappy attempt at sugar/kno3 rocket, few questions....
Replies: 16
Views: 9122

re: Sorta crappy attempt at sugar/kno3 rocket, few questions

despite i've only made a few rockets, i think the possible problem is that, since the mix was not melted or had a binder, when you lit it the grain lost its shape, blocked the nozzle and bang! replacing the sugar with a bit of glucose (1/4) is helpful while melting and moulding, you get a lighter (a...
by pablo
Sat Mar 18, 2006 3:35 pm
Forum: Gas turbine forum
Topic: turbocharger compressors
Replies: 4
Views: 3606

re: turbocharger compressors

there's a simple method using duct tape detailed in the plans someone upload of the kj66 sometime ago, but as John pointed out, it has to be mounted in the shaft.

Pablo
by pablo
Sun Sep 04, 2005 7:55 pm
Forum: Rocket forum
Topic: SS67B-3
Replies: 5
Views: 5192

re: SS67B-3

how does it use the kmno4? cos I made some attemps with it but could never "hold it" in place long enough. could you post a simple scheme or something?
thanks

Pablo
by pablo
Thu Jul 14, 2005 4:18 pm
Forum: Valved pulsejet forum
Topic: Phamton F-4 RC Pulsejet
Replies: 5
Views: 3478

re: Phamton F-4 RC Pulsejet

what about a foil of stainless to reflect part of the heat and then asbesto?
by pablo
Tue Jul 12, 2005 4:13 am
Forum: Valveless pulsejet forum
Topic: problem with Roscco stinger
Replies: 26
Views: 11607

re: problem with Roscco stinger

i tried again this morning with the other tank and still no luck, I increased then decreased the gap and still nothing, I'm getting tired of this, I'll switch to other project for a week to regain some enthusiasm and then get back to this one. (but probably with a new vac cleaner engine) thanks anyw...