Bald Eagle Aviation

[davidbray]

Is that damage on the crown of the A2 piston?

I would love to be able to see that stuff in person. I love working on engines.

[Pogo]

Wow. Think you'll ever get it all back together again?

How are the banks and cylinders ordered (the numbers and letters), and is it pretty standard, like engines on multis?

Or did I miss it (just looked again, didn't see anything)?

[51fixer]

Wow. Think you'll ever get it all back together again?

How are the banks and cylinders ordered (the numbers and letters), and is it pretty standard, like engines on multis?

Or did I miss it (just looked again, didn't see anything)?

The Heads and Banks do have part numbers but generically speaking the H/B is specific to a series of the engines produced.
Merlins and Griffons both have the removable H/B design. And the design of the H/B changes as an engine design evolves.
The H/B assys of many of the later models of an engine can be retrofitted to an earlier mark of an engine.
Many Wartime Merlin models in todays P-51s have post war transport 500, 600 or 700 series H/Bs installed. They are later technology and were designed for use on transports and airliners which needed long periods between maint and enhanced reliability.
The Spit here is a Griffon 65 but has Griffon 58 H/Bs, like what I just pulled in the latest post, installed instead of the original Griffon 65 H/Bs. The 58 banks fit right on but have slight differences in how the oil lines connect along with other minor differences. They also were produced later and offer the latest mods and upgrades and parts made as the Griffon 58 was used by the RAF until the early 1990s. There is still many NOS and overhauled parts around due to this.
As far as bolting it back together- This is kinda a lets see the condition of this engine and hopefully be able to collect some needed spares from it. If this gets overhauled it will get sent off to an O/H shop.
Ordering parts is normal, look up numbers in the parts book and try to find someone who has it.

[51fixer]

I mentioned before that RR made the whole QEC, firewall forward.
I noticed this today-
Dataplate on the QEC has a serial number and many of the cowl pieces have the same number including the dishpan behind the spinner-


We got the remaining pistons removed. I made a quick pin puller to help. It isn't as fancy as some OEM ones I've used but did the trick-

Machined part that grabs the edge of the pin. The ID tapers, it is thin at the edge and gets thicker until about 1" in from the edge it is a uniform thickness acoss the piece until it hits that 1" point on the other side and thins down again.

Just out of the piston-


I got the pistons cleaned in the solvent tank and the rings removed. 1 oil ring on B6 grew a little rust and was stuck in the groove. After a bit of lube and coaxing it snapped anyway. Next step will be plastic media to clean carbon and stuff.

Engine data plate-

It is behind the mount so you can't see it straight on.

[Django]

The H/B assys of many of the later models of an engine can be retrofitted to an earlier mark of an engine.
Many Wartime Merlin models in todays P-51s have post war transport 500, 600 or 700 series H/Bs installed. They are later technology and were designed for use on transports and airliners which needed long periods between maint and enhanced reliability.
.

Very interesting. Makes lots of sense.

[T-28mike]

Wow. Think you'll ever get it all back together again?

How are the banks and cylinders ordered (the numbers and letters), and is it pretty standard, like engines on multis?

Or did I miss it (just looked again, didn't see anything)?

Pogo,
As I understand this question you are asking the arrangement of the engine (order). On a Merlin, "A" bank is on the right as viewed from the supercharger (or Anti-propeller) end, and is numbered front to rear A-1, A-2 etc... B-bank is (obviously) on the left and is also numbered front to back B-1, B-2, etc...
Firing order is 1-a, 6-b, 4-a, 3-b, 2-a, 5-b, 6-a, 1-b, 3-a, 4-b, 5-a, 2-b


I assume (we know where that leads) that a Griffon is identified in a similar manor.... Rich?

[Pogo]

Thanks, guys! I'm learning so much I bet I can put it back together now.......



Uh huh.....

[51fixer]

Wow. Think you'll ever get it all back together again?

How are the banks and cylinders ordered (the numbers and letters), and is it pretty standard, like engines on multis?

Or did I miss it (just looked again, didn't see anything)?

Pogo,
As I understand this question you are asking the arrangement of the engine (order). On a Merlin, "A" bank is on the right as viewed from the supercharger (or Anti-propeller) end, and is numbered front to rear A-1, A-2 etc... B-bank is (obviously) on the left and is also numbered front to back B-1, B-2, etc...
Firing order is 1-a, 6-b, 4-a, 3-b, 2-a, 5-b, 6-a, 1-b, 3-a, 4-b, 5-a, 2-b


I assume (we know where that leads) that a Griffon is identified in a similar manor.... Rich?

A bank on right #1 in front, 6 at the rear.
B Bank on the left, the same for numbering.
Pilots view looking at the engine for R and L.
Engine rotates in the opposite direction from Merlin so I'll have to check the firing order but it is probably opposite of what you have.

Last edited by 51fixer on Fri Jul 08, 2011 10:06 pm, edited 1 time in total.

[Lynn Allen]

Rich, is Roush Racing doing anything for the Griffons yet??

TIA

[51fixer]

Rich, is Roush Racing doing anything for the Griffons yet??

TIA

Only thing I know of is that they made the bank jacks for us.
We've talked about things with them but nothing more.

[levier]

Rich, Jim,

Enjoyed seeing this engine after my visit last February... like to return as it comes together.

Brian Silcox

[Jim Beasley]

We're trying to figure out how to redo the SNJ and the T6G panels. Here's a rough design I've done for my SNJ. Forget about period correct for ops in the Northeast.

[Lynn Allen]

We're trying to figure out how to redo the SNJ and the T6G panels. Here's a rough design I've done for my SNJ. Forget about period correct for ops in the Northeast.

Great looking panel Jim, its better than most corporate a/c I have been...

[RyanShort1]

Love the GTN units mocked up there. Those are some nice pieces of equipment!

Ryan

[AHancock51]

Our gang (1941 HAG - Geneseo) was up at the Rochester show this weekend with a few of our birds. We had the privilege of seeing Jim do an awesome Heritage Flight with the A-10! Great work!