RCU Forums - Jet Cat 120 repair

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Jet Cat 120 repair

RE: Jet Cat 120 repair

Chrigui,

Nice work, I guess this J.C. 120 has a lot of hours on it?

RE: Jet Cat 120 repair

This is a good indication of what happens if you have a needle or vap tube problem the others have to work harder to produce the rpm the ECU wants and so run a lot hotter in the CC, causing the cracking of the NGV.

Chrigui, what did you use to clean the CC

RE: Jet Cat 120 repair

the original egv was reduced in diameter (i dont know who has done the work... ) and the thickness was only 0,25 mm
maybe to fit in the non original flange stick support
with high temp the egv cracked..also i found the gap between turbine wheel and egv was over 0,6mm in radius
(maybe modified to eliminate turbine touching egv)
i know that engine was buyed by ebay in holland...
i clean with fine sand and washed....alternative is ultrasound when carbon deposits are less than in the photo

RE: Jet Cat 120 repair

Im very impress the NGV guide vanes are still intact even with a bad CC. We need a RCUNIVERSE home turbine repair Forum :D.

RE: Jet Cat 120 repair

the ngv blade are intact because they are thicker

ps..sorry for may bad english..[:o][:o]

RE: Jet Cat 120 repair

Your english is fine! ;)

RE: Jet Cat 120 repair

Ciao Chris...buon lavoro!!! ;)
Vin...

RE: Jet Cat 120 repair

ciao vincent.... grazie ...tutto bene?? come stai?

RE: Jet Cat 120 repair

Quote:

ORIGINAL: basimpsn

Im very impress the NGV guide vanes are still intact even with a bad CC. We need a RCUNIVERSE home turbine repair Forum :D.

I started this thread [link=http://www.rcuniverse.com/forum/fb.asp?m=9049882]DIY Turbine stripdown & Maintenance[/link] some time back, as a database to other threads with similar stuff, would be nice for it to develop further as there is a lot if interest in DIY turbine work.

Chrigui maybe you will post a link to this thread on it as well.

RE: Jet Cat 120 repair

(DIY Turbine stripdown & Maintenance)

It would be my new addiction;). Chrigui good repair work. I am learning something new since the (HOW ITS MADE) video ;) for example the P-120 uses 6 burner not sure if the new P-120 SE using 12 sticks.

By the way nice work also on machining the new NGV. What material are you using?

RE: Jet Cat 120 repair

the 160 has 12 stick

new 120se i dont know

new p80 has sligtly modified diffuser and different CC design
http://a8.sphotos.ak.fbcdn.net/hphot...24_80067_n.jpg

RE: Jet Cat 120 repair

Good information ;) Any info on the NGV

RE: Jet Cat 120 repair

ngv is cast made from Albisser...

RE: Jet Cat 120 repair

Quote:

ORIGINAL: chrigui

ngv is cast made from Albisser...

What is Albisser???

I always though the hot sections were made for Inconel

http://en.wikipedia.org/wiki/Inconel

RE: Jet Cat 120 repair

Chrigui do you know what part number the old p120 compressor is

RE: Jet Cat 120 repair

Quote:

Dieter Albisser

Ok then :eek: because I couldn't find (Albisser) with Google :). Here is my attempt at a 12 injector CC

RE: Jet Cat 120 repair

Garrett T3 446279-0001
69,00 mm diametro maggiore
51,65mm diametro minore
6,25 mm diametro albero
Trim 56
12 palette (6+6)

RE: Jet Cat 120 repair

Hello basimpsn

What material did you use to make your injector needles, where did you purchase from?

Thanks, Neal

RE: Jet Cat 120 repair

you can use brass tube or siringe needle

RE: Jet Cat 120 repair

just tested the engine

120.000 rpm 672°c egt

RE: Jet Cat 120 repair

Good work, chirigui.

I have repaired this JC 120SE ( 6 sticks ). The NGV was in very bad condition. I have used a cast NGV like you, but this is a chinese one. It´s casted in inconel 713C, very very dificult to machine.

Regards.
Félix

RE: Jet Cat 120 repair

no problem to machine my egv.. you must to use right tools..

RE: Jet Cat 120 repair

I think Albisser NGV are not inconel, usually NGV are made from high grade SS. ( ANC 5B), and they are fairly easy to machine ( I havve machined several) . The supplier told me that this was Inconel 713 C, and actually is not easy to machine.

Regards.
Félix