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Turbine alignment - 8/10/2005 11:38:20 PM   
Yann


 

Posts: 1124
Joined: 3/16/2004
From: TOULOUSE, FRANCE
Status: offline 		If like me you have troubles to align your turbine / thrust pipe, here is what I just did for my Savex F16.
I used a laser pointer I placed of the turbine on the mount.
I first designed a little mount for the laser beam, to take the place of the turbine in the fuselage.
I taped a piece of paper as a target for the beam. The goal now is to get the laser beam in the center of the taget...
I did my turbine alignment in 10mn using this tool.
I thought this trick could be usefull
The end result can be seen on pics... perfect alignment of turbine and thrust pipe.

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       Post #: 1

RE: Turbine alignment - 8/11/2005 12:00:05 AM   
mr_matt



Posts: 6352
Joined: 12/7/2001
From: Oak Park, CA,
Status: online 		Great trick.

I did something similar to align the external wing tanks on my BVM F-4.

For turbine duct alignment (with no mounts to use) I use thread to line it up, I will try to post some puctures myself.

Again, very good tip!

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JetCat rep

(in reply to Yann)
       Post #: 2

RE: Turbine alignment - 8/11/2005 12:16:57 AM   
Yann


 

Posts: 1124
Joined: 3/16/2004
From: TOULOUSE, FRANCE
Status: offline 		Thanks Matt,
Just stick a piece of paper to the end of it, and you can align pretty much everything...
Once you have made it, don't loose it, you can re-use it anytime you want to check your alignment, or install your turbine in a new bird.

(in reply to mr_matt)
       Post #: 3

RE: Turbine alignment - 8/11/2005 8:14:16 AM   
Lt. Dan


 

Posts: 863
Joined: 8/16/2002
From: Arlington, TN, USA
Status: offline 		Excellent tip!

I use thread, but I may try the laser next time.



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       Post #: 4

RE: Turbine alignment - 8/11/2005 9:01:27 AM   
A343



Posts: 132
Joined: 1/31/2002
From: Hoersholm, , DENMARK
Status: offline 		And here another way of doing it. A woodblock turned in a lathe gives perfect alignment between my Merlin160 and Tam's pipe. Even the distance between the nozzle and exhaust is her adjusted to the correct value. It doesn´t matter if you are using a bifurcted- or a straight pipe, vertically and horizontal alignment is achieved.I´ve another block made for my P160.


My 2 cents.

Thomas

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< Message edited by A321 -- 8/11/2005 9:08:54 AM >

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       Post #: 5

RE: Turbine alignment - 8/11/2005 2:22:49 PM   
wojtek


 

Posts: 3016
Joined: 12/25/2001
From: old bridge, NJ, USA
Status: offline 		hey guys, all good stuff here .... thanks very much as i will use a bunch of these ideas in the coming weeks ..


Wojtek

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RE: Turbine alignment - 8/11/2005 4:51:22 PM   
Delta Mike


 

Posts: 123
Joined: 7/17/2002
From: Tulsa, OK, USA
Status: offline 		How critical is the alignment on centering???? Dennis

(in reply to Lt. Dan)
       Post #: 7

RE: Turbine alignment - 8/11/2005 4:54:58 PM   
erbroens



Posts: 1856
Joined: 11/20/2003
From: Curitiba, Parana, BRAZIL
Status: offline 		great idea... thx for posting! I´ll going to make a wheel alignament tool with it too...




Enrique


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RE: Turbine alignment - 8/11/2005 5:15:48 PM   
Yann


 

Posts: 1124
Joined: 3/16/2004
From: TOULOUSE, FRANCE
Status: offline 		Thomas,

First, I thought of this solution, but without a lathe to turn the wood block, my first attempt was a disaster...
It also has to be a tight fit to be accurate. Congrats, you worked it out...


Lt. Dan,

Godd idea, but how do you keep perpendicularity with your former, as you move it around to find the perfect spot ?
Also, you can only check two dimensions at a time...


Dennis,

If your turbine is missaligned with the thrust pipe you loose power. If the pipe is missaligned, you have the wrong thrust line, and the turbine won't push strait.
You might have troubles to trim the plane. It all depends of course how bad is your missalignment.


Thanks a lot for your inputs guys,

Yann

< Message edited by Yann -- 8/11/2005 6:00:44 PM >

(in reply to A343)
       Post #: 9

RE: Turbine alignment - 8/11/2005 5:52:47 PM   
Woketman



Posts: 3871
Joined: 12/6/2001
From: Slidell, LA, USA
Status: offline 		I have found turbine alignment, when using a thrust tube as we are discussing here, to be very non-critical. Sure, if you are a few degrees off you will be heating up one side of the thrust tube a bit more, but if your tube is plenty thick (0.008" ), no matter. If it is at least three diameters long, you won't notice any thrust misalignment. If you visually center the tail end and the angle with the tube, all will be just fine.

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RE: Turbine alignment - 8/11/2005 10:27:07 PM   
Miguel Santana



Posts: 1021
Joined: 5/14/2002
From: Santo Domingo, DOMINICAN REPUBLIC
Status: offline 		Nice creations ....all.
In my case I made a rim with carton.... Was thinking using a GPS , but decided not giving my friend another reason to makes jokes on my perfectionist sickness....

(in reply to Woketman)
       Post #: 11

RE: Turbine alignment - 8/11/2005 10:30:35 PM   
Yann


 

Posts: 1124
Joined: 3/16/2004
From: TOULOUSE, FRANCE
Status: offline 		Miguel, if you're so blind you need a GPS, don't bother, go strait to the white cane...

(in reply to Miguel Santana)
       Post #: 12

RE: Turbine alignment - 8/12/2005 12:00:44 AM   
Lt. Dan


 

Posts: 863
Joined: 8/16/2002
From: Arlington, TN, USA
Status: offline
quote:

ORIGINAL: Yann
Lt. Dan,

Godd idea, but how do you keep perpendicularity with your former, as you move it around to find the perfect spot ?
Also, you can only check two dimensions at a time...



Yann, I'm not sure I understand your question fully. I have measured the centerline of the airframe and then attached a string to run along it. I then line up the engine centerline along the string, and then once the mount is bolted in, I lined up the pipe the same way.

(in reply to Yann)
       Post #: 13

RE: Turbine alignment - 8/12/2005 12:15:11 AM   
grbaker



Posts: 2368
Joined: 12/12/2001
From: Houston, TX, USA
Status: offline 		I think he is stating that your method only lines the turbine and pipe up laterally and not vertically.

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Gary Baker

(in reply to Lt. Dan)
       Post #: 14

RE: Turbine alignment - 8/12/2005 12:17:34 AM