# Tail Number Question

Discussion in 'Warbirds / Warbird Replicas' started by TXFlyGuy, May 24, 2019.

### Help Support HomeBuiltAirplanes Forum by donating:

1. May 24, 2019

### TXFlyGuy

#### Well-Known Member

Joined:
Apr 26, 2012
Messages:
1,463
426
Location:
Republic of Texas
What is the logic in the numbers that normally appear on the tail of a P-51? I was told that the first two digits were the year of manufacture, the the last four digits were the serial number.

But there are Mustangs with 47----, and saw battle in WWII. So that can't be correct.

Example here:

What is the real answer as to the origin of the 6 digits on the tail?

2. May 24, 2019

### Deuelly

#### Well-Known Member

Joined:
Nov 6, 2012
Messages:
117
101
Location:
Marshall, MN
The first number is the last number in the year the contract was issued. The rest is the aircraft's individual serial number issued by the AAF. In your example '44 is the year.

3. May 24, 2019

### TXFlyGuy

#### Well-Known Member

Joined:
Apr 26, 2012
Messages:
1,463
426
Location:
Republic of Texas
Thanks. Do you know the correct size of these numbers, in height?

So if the first digit was a 3, that would represent 1943?

4. May 24, 2019

### Deuelly

#### Well-Known Member

Joined:
Nov 6, 2012
Messages:
117
101
Location:
Marshall, MN
Yes '43 would be correct. The numbers are 8" tall on the P-51.

TXFlyGuy likes this.
5. May 24, 2019

### TXFlyGuy

#### Well-Known Member

Joined:
Apr 26, 2012
Messages:
1,463
426
Location:
Republic of Texas
Thanks for the info, you have been very helpful.

6. May 24, 2019

### TFF

#### Well-Known Member

Joined:
Apr 28, 2010
Messages:
11,543
3,230
Location:
Memphis, TN
J.L. Frusha and TXFlyGuy like this.
7. May 24, 2019

### Deuelly

#### Well-Known Member

Joined:
Nov 6, 2012
Messages:
117
101
Location:
Marshall, MN
Joe has a great sight with lots of information. I've used it quite a bit in the past.

8. May 24, 2019

### TXFlyGuy

#### Well-Known Member

Joined:
Apr 26, 2012
Messages:
1,463
426
Location:
Republic of Texas
For sure. Very good info. And a big help.

9. May 25, 2019

Joined:
Feb 17, 2006
Messages:
117