RunRyder RC
WATCH
 1 page 449 views POST REPLY
HomeTurbineAircraftHelicopterTurbine Helicopters › Missing holes in MW54 combustion chamber?
03-10-2018 10:49 AM  5 months agoPost 1
eeeeky

rrVeteran

Roosevelt UT USA

My Posts: All  Forum  Topic

Hey all. Sorry for all the posts lately, can you tell im terrified im breaking this thing? Haha!

I got my engine thing in parts, needing bearings and a flame ring. The parts are here and im assembling the engine. I have noticed two issues that are keeping me from comfortably assembling the engine. The first is that in the manual i have from Wren, it shows 3 bolts that hold the combustion chamber to the front aluminum plate. My combustion chamber does NOT have these holes, and i know the engine was run by the previous owner for around 56 hours.
The second would be, my combustion chamber also has two glow plug provisions, while my case only has one glow plug hole. Again, the engine has run for hours and hours, but i received it 100% disassembled.
Am i severely overthinking my process here? Or am i actually missing something?
Thank you for your time.

Lets Fly!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-10-2018 11:45 AM  5 months agoPost 2
dgoss999

rrApprentice

UK - Lancashire

My Posts: All  Forum  Topic

The case is cosmetic and a way to keep the gasses in the turbine and square up the rear and the front.. (and to hold the glow plug!) The single hole case will work, the older cases had 2 holes so effectively had a 'spare' glow plug.. You only ever fire up 1 glow plug anyway!

The pictures in this thread may help you.

https://www.helifreak.com/showthread.php?t=6473

Phew!! Good luck. Really you need an assembly manual For your first assembly, so you can see how this all hangs together. Have you contacted Wren to see if they have a .PDF?

DG.

"Believe none of what you hear, and only half of what you see." • Benjamin Franklin

PM  EMAIL  GALLERY  Attn:RR  Quote
03-10-2018 12:09 PM  5 months agoPost 3
eeeeky

rrVeteran

Roosevelt UT USA

My Posts: All  Forum  Topic

I figured the one glowplug was normal, and that the second hole is just blocked off by the case. Looking at picture #17 in that thread, those three bolts sticking thru, the holes are non existent on my chamber. The manual i have is the PDF from wren printed out.

Lets Fly!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-10-2018 12:24 PM  5 months agoPost 4
dgoss999

rrApprentice

UK - Lancashire

My Posts: All  Forum  Topic

Check out the galleries of Mattjen and bell bloke. They had lots of photos of the old MW54.

This may help you too.

Also I know there were different versions of the front plate.

DG

"Believe none of what you hear, and only half of what you see." • Benjamin Franklin

PM  EMAIL  GALLERY  Attn:RR  Quote
03-10-2018 12:44 PM  5 months agoPost 5
eeeeky

rrVeteran

Roosevelt UT USA

My Posts: All  Forum  Topic

I suppose i should have mentioned, my front plate DOES have the threaded holes for the bolts. Just no holes in the chamber, and no bolts/spacers in the hardware box. Im guessing there is likely a version that was held in with the NGV as it does seem fairly secure with the NGV installed.

Lets Fly!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-10-2018 12:51 PM  5 months agoPost 6
dgoss999

rrApprentice

UK - Lancashire

My Posts: All  Forum  Topic

The instructions I have for a mk3 turbine shows the combustion chamber as a push fit on the NGV and not fixed to the front..

You may have a mk3 chamber in mk4 housings.. If it was a runner before you got it try blocking the holes in the front with small cap screws loctite in.

DG

"Believe none of what you hear, and only half of what you see." • Benjamin Franklin

PM  EMAIL  GALLERY  Attn:RR  Quote
03-11-2018 08:42 PM  5 months agoPost 7
eeeeky

rrVeteran

Roosevelt UT USA

My Posts: All  Forum  Topic

Any chance you can tell me if there are snap rings behind the front bearing between the shim and spring? I just replaced the bearings and what I thought was bearing seals also fell out when the bearing came apart. But I realized they don't have them

Again there were TWO of these behind the front bearing somewhere. I don't see them mentioned in any instructions.

With the new bearings the shaft spins freely, but does have some minimal drag.

I promise I'm not an idiot, just terrified of hurting this any farther and not having much support.

Lets Fly!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-11-2018 09:44 PM  5 months agoPost 8
balsapro

rrVeteran

Gallatin,TN

My Posts: All  Forum  Topic

I'd love to see de more pics of everything...

Been awhile since I had one tore down

Build the Best, Fly the Best, Crash the Best

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-11-2018 10:01 PM  5 months agoPost 9
eeeeky

rrVeteran

Roosevelt UT USA

My Posts: All  Forum  Topic

Finally found them in the actual engine schematic. And they are barely identified and not mentioned at all. Ill post more pics soon.

Lets Fly!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-11-2018 11:10 PM  5 months agoPost 10
dgoss999

rrApprentice

UK - Lancashire

My Posts: All  Forum  Topic

Eeeky, I am sure you are no Idiot!!

Can you take pictures of each end of the shaft tunnel showing where each bearing is fitted (with the bearings removed!) There are quite a few variations of shaft tunnel and each have different bearing preload system and bearing stops. Also pictures of the preload system.. Is it a sleeve and spring or just a couple of crimped washers..

DG.

"Believe none of what you hear, and only half of what you see." • Benjamin Franklin

PM  EMAIL  GALLERY  Attn:RR  Quote
03-12-2018 07:09 PM  5 months agoPost 11
Ron Ballard

rrNovice

Decatur, Indiana

My Posts: All  Forum  Topic

MW 54 Manual
Hope this helps

Kit_Instructions_June_04_MW54_Mk_2___3.pdf

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 449 views POST REPLY
HomeTurbineAircraftHelicopterTurbine Helicopters › Missing holes in MW54 combustion chamber?
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Friday, August 17 - 4:48 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online