Help to ID some CAC Mustang parts

[Digger]

Hi All

had some time recently to go through our inventory of P-51 items that were recovered here in Australia.

I know the site only has the remains of a Mustang however, some of the part numbers have me confused and I was hoping someone could clarify.

The part numbers that have me baffled all commence with the numerics;

101
126
88 and
73.

I have found some parts references to all but have also found some contradictions. Contradictions in the sense for example that part numbers with 88 can also be found on CAC Wirraways because of their genetic link to the NA16 and T6 series.

If anyone can clarify I would appreciate it very much


Peter

[51fixer]

Hi All

had some time recently to go through our inventory of P-51 items that were recovered here in Australia.

I know the site only has the remains of a Mustang however, some of the part numbers have me confused and I was hoping someone could clarify.

The part numbers that have me baffled all commence with the numerics;

101
126
88 and
73.

I have found some parts references to all but have also found some contradictions. Contradictions in the sense for example that part numbers with 88 can also be found on CAC Wirraways because of their genetic link to the NA16 and T6 series.

If anyone can clarify I would appreciate it very much


Peter

NAA shipped P-51 parts that were used in the production.
The NAA parts system used a prefix followed by a ( - ) dash followed by the part number.
The prefix is the point in time or lineage of the P/N and the A/C design.
73 desigination on the prefix means that part was designed for the 1st P-51 series.
At which point the part needs to be redesigned or created, if a newer design needs a part that wasn't a part of a previous model, the prefix number will be given at that point.
NAA just kept on assigning a new number as things progressed but numbers weren't blocked out, ie 70 series for P-51, but each design change or creation got the next number. T-6 series have P/Ns from the 50s, 60s, 70s, 80s ect. P-51s have 70s, 80s, 90, 100s, and so forth.
The last NAA T-6 designs produced during WWII was 121 prefix. Similar on the P-51D was 122. The P-51H has a prefix of 117.
And there are some T-6 parts that were used on the P-51.
Some bushings in the rudder pedals have a prefix on both T-6 and P-51 of 19.
After the P-51 was designed in 1941 the T-6 started using the same rudder pedals. The prefix is 73 and they have NAA emblem on them. Prior to that the T-6 had a rather plain rudder pedal.
To get a real accurate assessment of your parts you need the P-51 Blueprints, or at least the index for the prints. That has almost all the parts used in the construction.
The Illustrated Parts Book is next but doesn't give a large percentage the the id of individual parts.

Engine, Prop and Contractor companies and Gov Furnished parts will have numbers different as they didn't follow the NAA system.

So the 73 and 88 are good numbers from NAA for a P-51.
The 101 and 126 that you enquire about, if you list the entire P/N it would be a help as well as a photo.

[Digger]

Thanks Rich

explains a fair bit.

the numbers I have are

126492-1 followed by XB9013 this part also has XU552 on the opposite side. It contains a roller with a large elastic type cord through it.

Late entry - I've pulled the roller out and it has a part number of 50012 1S3B.

101 1315-0 is located on a section of leading edge rib no other details visible (yet)


hope this adds a bit more.

[Digger]

Found this on the Aviation Archeology site


P-51 H North American 126-


One more to go it seems



Peter

[FITD]

Rich has already advised that in a NAA Mustang part number the prefix indicates that part was first designed for a N.A.A. Model ??.

The NAA Parts Catalog gives the following example;

102 - 54253

This part was first designed for a N.A.A. Model 102

After the dash, the basic number (54000) indicates that the part was designed for the Electrical System.

Many, but not all, of the part numbers after the dash were 5 digits BUT there are some exceptions. See below.

If there is a suffix after the part number then it can either be to show a different drawing when compared to the original part. (i.e. There are 4 Windshield Assemblies for the P-51D/K, 106-318226, 106-318226-50, 106-318226-100 and 106-318226-200) or to show if the part is Left or Right handed. i.e. 73-31334 is an "Angle-Fuselage station 256 stiffener LH" while 73-31334-1 is an "Angle-Fuselage station 256 stiffener RH".

CAC Mustangs may contain N.A.A. part numbers or CAC part numbers which have a prefix of 17 or 18, or even a mix of both! In the previous example this part became 17-31334 with CAC.

Digger/Peter you list the following part numbers;

126492-1 XB9013 XU552 and 101 1315-0

which appear on a quick look not to be N.A.A. or CAC Mustang manufactured parts.

FITD

[Digger]

Ah, the plot thickens.

this is the site I got the details from re the P-51H

http://www.aviationarchaeology.com/src/partmanu.htm

not disputing either opinion, but this is a good example of the difficulties with mixed components etc ie CAA and NAA.

Another part I have is manufactured by the Ryan Aeronautical Company Pat number 2.219.752 with a part number of 10219.

This piece came from a different site but I think is a good example of the confusion around what aircraft types used what numbers etc.

many thanks

Peter

[bdk]

The part with the roller and elastic cord is likely from a seat and would not be a Mustang part number, but the seat manufacturers part number. I can't think of anywhere else that could be on a Mustang.

[Digger]

Thanks bdk.

Having owned a Wirraway, I immediately figured these parts were something to do with the seats.

However, it has been pointed out to me that the Mustang canopy works on a series of pullies and cords to make it easy for the

canopy to be opened and released in emergencies. My manuals do not have the level of detail int hem to explain this and I have been

searching the net, but no answers yet. What I do have from the same location is the Main Landing gear locking mechanisms, the canopy locks - both sides,

emergency release handle and mechanism, canopy rails - both sides to name a few, so when I was going through these and checking the part numbers

to confirm or disprove my premise, I cam upon these pully brackets, cords and angle fittings. Given everything else aligned with P-51 reinforced my

notion these 126 parts were also P-51.

Happy to email pics to any gurus for a better examination.

[51fixer]

Thanks bdk.

Having owned a Wirraway, I immediately figured these parts were something to do with the seats.

However, it has been pointed out to me that the Mustang canopy works on a series of pullies and cords to make it easy for the

canopy to be opened and released in emergencies. My manuals do not have the level of detail int hem to explain this and I have been

searching the net, but no answers yet. What I do have from the same location is the Main Landing gear locking mechanisms, the canopy locks - both sides,

emergency release handle and mechanism, canopy rails - both sides to name a few, so when I was going through these and checking the part numbers

to confirm or disprove my premise, I cam upon these pully brackets, cords and angle fittings. Given everything else aligned with P-51 reinforced my

notion these 126 parts were also P-51.

Happy to email pics to any gurus for a better examination.

At least for some US A/C the bungie part would be seat related. No other place was an elastic cord used but I don't recall that being used on the P-51D. Rather it had compression springs on the seat rails to assist the movement of the seat. Not bungies as used in the T-6 series. Canopy system had a few small springs on the canopy trucks and also on each track for the blade portion that would move at a diagonal to release the canopy in an emergency. Everything else was cables w/phenolic pulleys and a type of chain on a sprocket rotated by the crank in the cockpit. No bungies/elastic cords.
The back of my parts book shows no 126 numbers. It lists a 1253DEW and the next item is 1312EE. That doesn't mean that there couldn't have been some non-NAA produced part with a 126 P/N on it.

[bdk]

As far as I can recall, the Mustang gear up and downlocks are of the same design as the T-6, though not identical. All pushrods to unlock and spring loaded to latch both up and down. I don't think you'd want to trust a bungee in such a critical application.