chrigui

the machine in the pic's are little (25 ton)

but we have a 350 ton

Jetbono

I also noticed you dont use seringe needles for your injectors instead you use brass capilary, what size is it ?

Jetbono

Hey Gerals

I noticed the holes in your combustion chamber are very round , what do you use to drill the 0.5mm SS sheet ?

Gerald Rutten

I use simple and cheap ss drills which I sharpen myself now and than. Triangular holes are of no concern at all, some other engines of mine have them, no difference in combustion. Maybe the reason the holes you saw where nice and round because I made several sheets in one atempt. I stick the paper template to the ss pre-cut sheet and I stick 3 ss sheets together using ordinairy double sided sticking tape. I drilled them through all at once making more meat to drill in. In this way I make more liners in one go, very easy!

Rgds,
Gerald

Gerald Rutten

These are 1mm outer, 0,5mm inner. Due to the large diameter it is adviced to make them longer to increase resistance, they are usualy about 60mm long. That's why they are positioned in a coil. seringes may be better but I had this stuf in large qty's. Also it less prone to blockages.

Jetbono

Great, I thought you used some special methode of some kind ... hahaha

Haa let me show youmy combustor Im making ..

Look at my perfect holes here , Im following your footsteps !! hahaha

chrigui

anyone have done other tests??

i'm closing holes in combustion chamber trying to eliminate flame trough ngv in my first engine..

any pics of combustion chamber after running is appreciate

mnours

Hello to all
Please provide me with the type of metal made him all the engine components
And where you get the engine turbine manufacturing scheme
Thank you for all
Nur

Gerald Rutten

Hi Nur, please look here: http://www.jetmax.ch/en/products.htm

Rgds,
Gerald

chrigui

closing 12 holes in front of the cc the situation is slightly better

i will try to close other 12 holes and after 2 different solution of cc



(maybe the problem is the improved performace fo compressor after reduction clearance between it and cover and diffusor ?!!?[&o][&o])[&o][&o]

chrigui

to prevent failure due screw touching turbine wheel

AdriFlyBoy

I have one noobish question.Has the diffuser design anything with thrust?What are the differences between helical(or two stage)diffuser and the kamps one(with glued vanes)?Can the same thrust(16-18kg)be achieved with kamps style diffuser on UT-160ZA ?

Here is my situation.I have a lathe that I am going to convert to CNC but I don't have a mill.So it would be great thing if I could get away without mill by building Kamps style diffuser.

I apologise if there is any misunderstandment,English is not my first language.

chrigui

i built 3 engine 160 with kamps diffuser style..
16,2 16,3 kg/trust

never tryed with old style diffuser design...but i think that is less efficent...
18/19kg was achived by gerald rutten changing the compressor and modify the diffuser and exaust cone ...

PDR200

Hi Guys,
Sorry its been awhile since I've posted. Here are some Pic's of what I've been up to

Cheers,
Paul

PDR200

more,

PDR200

more,

PDR200

,,

PDR200

..

PDR200

So far I've only done a few test runs

I have some small problems to fix. Then I should be able to do much more testing and post some accurite data.

My main problem is at low power settings (below 40%) I have flame thru the NGV same as Chrigui?? but when power increases combustion goes back inside the combustion chamber.

Does anyone know what causes this problem? [:'(]

More info coming,
Cheers,

AdriFlyBoy

So that menas that I can use the compressor like on Kamps turbine(book "Model jet engines")?
Here is the picture(it's a simple round piece of metal with glued vanes):
http://www.gtba.co.uk/engine_designs/kamps.php
You can see picture of Kamps diffuser under "Materials".Is that ok for UT160?
Will I still get 16kg of thrust?

chrigui

hello .. my problem was the lubrication fluid (front bearing) sucked by compressor due to clearance between compressor base
and the diffuser.... solved later ...

AdriFlyBoy

So,will I still get 16+kg of thrust with old style Kamps diffuser(with glued vanes).That kind of diffuser is more similar to helical diffuser in UT160-ZA than to the two stage diffuser in UT160.

chrigui

your glued diffuser is similar to FRANK TURBINE DIFFUSER..
maybe the trust will be around 15kg...

AdriFlyBoy

From UT160 or UT160-ZA?

chrigui

for 16kg trust i suggest 160-za