Gr 180

  • Topicstarter Topicstarter Dylan Roberts
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Dylan Roberts

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Hello everyone,

After many hours of reading the forum (help from google translate) and with even more help from Gerald, i have started with a GR180 as my first turbine.


it will be a very slow build as i have to make all the tooling at the same time.

a few pictures so far:

gr180a.jpg

By dylan2048 at 2011-12-04

3D model


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my cousin has a grinding machine at work:D


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Schwitzer cmpressor


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internal radius on intake


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it fits :)


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diffuser is not as nice as i had hoped, i used a cnc router designed for wood and plastic. so i need to do some filling with epoxy. perhaps i will try make a new one.


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mold for balancer Vblocks


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completed block with carbon springs

thats my progress so far.... more to come at a later stage ;)
 
the shaft is looking very nice!

also very nice work on the intake, diffusor and balancer blocks :)

what's wrong with the diffusor?

Best regards,

Rik
 
Thanks Gerald

Rik, here is a picture i drew, slightly exaggerated to show what happened, the cnc router is not very rigid so the cutter was climbing up into the vanes

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i filled it with a very good quality metal filled epoxy and now i am filing it.
(takes more time than if i just made the part on my manual machine :)

on the next balancer blocks i might embed MEMS accelerometers into them when i cast them. then there will be no springs/links to sensors.
 
a slightly handy tip:

because the walls of your diffusor are a bit smaller now, use a mill to "(pre)drill" the holes. I had a similar problem, made the holes by drilling and the drill run out(even used a center drill) -> a big hole in the wall of my vane.

What kind of MEMS (i assume you mean accelerometer) are you going to use? The ones i found had a low bandwidth
are you planning on making balancing software and stuff yourself?


B.R,

Rik
 
Hello,
Nice work it looks really good.
After i have completed my tjt-80/kj66 rebuild,
i also want to make geralds turbine.
But i allready have a problem, i started with a jetjoe 1400(in hold) now the tjt and i really want a gr180 and a turboprop.
Turbines are really becoming an addict every free minute searching for more info on the internet.
 
Gerald Rutten zei:
Yessssss......:cool:
Klik om te vergroten...

hahahahaha Gerald its all your fault :D

vwspeedster, i met Gerald and saw one of his engines in 1998... i think i was 10 years old.... addicted ever since :)


Rik, i will be as carefull as i can, still thinking of making a new one, i have lots of time because i dont have all the parts yet :)

Mems accelerometers i have not looked into properly yet, a friend had some that were 5mmx5mmx1mm? with analogue output so i will use it on the oscilloscope same as piezo's. quite interested in Miklos software also.
 
Dylan Roberts zei:
Mems accelerometers i have not looked into properly yet, a friend had some that were 5mmx5mmx1mm? with analogue output so i will use it on the oscilloscope same as piezo's. quite interested in Miklos software also.
Klik om te vergroten...

I hope they are on a breakout board, because i think they are QFN packages, so no leads.
these packages are very hard to solder :p do you know the typenumber of the chip?

there is a chance that you need to amplify the signal, depending on your type of chip
B.R.

Rik
 
Rik,

no breakout boards, but some solder paste and hot air make it easier to solder.

i was thinking of this : LIS352AX - STMicroelectronics

but i have no idea if it will be suitable yet.

this weekend or early next week i will start making jigs to machine the compressor wheel.


sorry if this thread is such a mix of topics, if you would prefer i can create a seperate one for my balancing machine?
 
i like it.
You are realy a homebuilder ,and makes his own tools .
Just like we do , hope to see it running soon.

Regards,

Martin.
 
Very nice work Dylan! Soon I will install the new type combustionchamber in my other GR180 on my F16 and once that's ok I will release the new drawings. They can easily be modifies from the older.

Rgds,
 
nice work! :)

i see there's a small hole in the ring in the last photo. I have that too sometimes when i release the clamps before the transformer is off. Is that what happened to you too?

nice work on the rollbender :)

B.R,

Rik
 
Martin, thank you. :) i enjoy playing in the workshop.

Gerald, that will be great, i plan to test it like this and then slowly work it up to your latest sizes.

Rick, the hole was the first weld, i had the timer set for 2 seconds :) the best spot on there was 0.1 seconds...... since then i have lowered the secondary voltage and its more controlable.
 
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