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Old 09-28-2010, 10:21 AM   #1
fltenwheeler
 
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Default Packard Merlin V-12 pictures

Hi All

I came across this on chaski. Inner workings of a Packard Merlin.

http://www.chaski.org/homemachinist/viewtopic.php?f=26&t=85420&start=0

Tim



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Old 09-28-2010, 11:49 AM   #2
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Default Re: Packard Merlin V-12 pictures

I served my time on those engines but not the Packard version, the genuine RR version.

John S.



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Old 09-28-2010, 12:09 PM   #3
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Default Re: Packard Merlin V-12 pictures

If you want to make a model of one, then this is just the place.

http://dynamotive.netfirms.com/merlin/

But be sitting down when you look at the prices.


Bogs

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Old 09-28-2010, 04:52 PM   #4
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Default Re: Packard Merlin V-12 pictures

Ought to be a simple build....

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Old 09-28-2010, 05:32 PM   #5
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Default Re: Packard Merlin V-12 pictures

Don't think I've got enough years left to drill and tap all those screw holes!

Chuck

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Old 09-28-2010, 06:13 PM   #6
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Default Re: Packard Merlin V-12 pictures

Quote:
Originally Posted by cfellows
Don't think I've got enough years left to drill and tap all those screw holes!

Chuck
Thats how you tell a R/R, never use 5 bolts when 30 screws will fit.
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Old 09-28-2010, 06:16 PM   #7
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Default Re: Packard Merlin V-12 pictures

And don't forget the locking wire, two O:clock to 7 O:clock or you get a smack round the head

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Old 09-29-2010, 04:45 AM   #8
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Default Re: Packard Merlin V-12 pictures

"Thats how you tell a R/R, never use 5 bolts when 30 screws will fit."

Apparently RR did quite a bit of research in the 1920's and apart from anything else they discovered that for any given joint, more small fixings were both lighter and stronger than the same joint with fewer larger fixings. The fact that it cost more, was to them irrelevant I suppose.

Also my dear old Dad was an Engine Fitter on Lancasters during WW2. These had four Merlins. Dad used to say that it was possible to identify a Rolls Merlin from a Packard Merlin without taking the cowling panels off, (or looking at the paperwork). Simply stick your hand up an exhaust port, preferably when the motor wasn't running!!, the RR engine ports were smooth, the Packard Merlin ports weren't.

cheers
Bill Pudney



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