 chopperfan wrote: |
| Ishthe47guy wrote: | | Hey fellas. I just took a look at the site Intruder_Bass listed. The sample pics look great, but I would not take the narratives as gospel. Even without seeing page 23 I can tell you that there is no mounting differences between the left & right engine. Also, the exhaust cone can be mounted on either engine. I'd just use this book for the pics, not the narratives. Chris Ish, long time CH-47 mechanic |
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Good morning Chris. I am not the expert, you are. But, I think what they were saying in the caption wasn't that there is a difference between the left and right engine mounts. They are stating that there is a difference between the mounts in general from the ones on page 23. At least that's the way I read it. Which does bring up a question. Was there a difference in the engine mounts from one model to the next? I'm just curious. Not doubting one word you say. |
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Chris is right. The mounts are identical between #1 and #2 (Left and Right) engines. Basically it is a three point set up with two mounts forward and one on the aft part of the engine just forward of the exhaust.
What IS different between left and right engines are the engine air inlets screens. The engine transmissions that are mounted on the face of the engine are also interchangeable and require minimal adjustments when changing from left to right.
Now, what DOES make a difference between left and right mounting is when the tach generator has to be changed. A pain in the a** to do when the engines are installed (on either side) but a little harder on the left hand engine, especially at night...under minimal lighting...in the rain...when the temps are just above freezing.
If I recall, the forward and aft mounts stayed the same from A to C and C to D. I know that T-55-L-7s, 'L-11 series, and T-55-712s were virtually the same with some minor mods done to the aft link.
This shows the #1 Eingine outboard mount and aft "dog bone" mount. The forward mount is just under the "T" shaped item (this is used to hold the engine cowl access panel in place) As can be seen some idiot has used tie wraps on the drag link to hold anti chafe material in place.(The prblem with using anti chafing material on structures, hoses and lines, is that it sometimes led to those items being chafed form the material) The aft engine airframe mount is just aft of the "drag link". The actual engine mount cannot be seen but is connected with a link between the engine and airframe (commonly refered to as a Dog Bone...or at least it used to be)
Jonathan Primm
another 'Hook Mech/Flight Engineer