I dug through my grandfather's stuff and have not found anything conclusive.

Was your dad colour blind ?

My grandfather was recruited because he was.

He did missions over Poland in that glass bubble under the plane because colour blind me have better overall sight and are not fooled by camouflage.

They had a lot of men to service planes.

Knowing you, he was probably an aircraft mechanic 

Carl,

AC2

The rank was introduced to the RAF in January 1919, replacing the ranks of "air mechanic", "private" and "clerk"

that had been introduced under Air Memorandum No. 1 in March 1918.

There were three grades: leading aircraftman (LAC), aircraftman 1st class (AC1) and aircraftman 2nd class.

NON-COMMISIONED RANKS

The non-commissioned rank insignia was worn centred on the upper sleeve on all orders of dress except the Warrant Officer's (WO) insignia which was worn on the cuff.

The RCAF rank of Aircraftman 2nd class (AC2) had no insignia.

The present CF rank insignia of Private (Pte) also has no insignia.

The RCAF rank of Aircraftman 1st class (AC1) had no insignia.

The present CF rank insignia of Private Trained (Pte [T]) is a single inverted chevron.

The RCAF ranks of AC2 and AC1 had no distinguishing badges.

The RCAF rank of Leading Aircraftman (LAC) was a propeller.

The present CF rank insignia of Corporal (Cpl) is two inverted chevrons.

The RCAF rank of Cpl had two inverted chevrons and was equal to the present CF rank of Master Corporal (MCpl).

The MCpl insignia has a maple leaf above the two inverted chevrons.

An RCAF Sergeant (Sgt) had three inverted chevrons and is equal to the present CF rank of Sgt except the present insignia has a maple leaf above the three inverted chevrons.

The RCAF rank of Flight Sergeant (F/Sgt) had a brass or cloth crown worn above three inverted chevrons.

The design of the crown changed from the King's Crown to the Queen's Crown with the coronation of Queen Elizabeth II in 1952.

The present CF rank insignia of WO is the St. Edward's crown.

The RCAF rank of Warrant Officer 2nd Class (WO2) was the King's or Queen's Crown.

The present CF rank insignia of Master Warrant Officer (MWO) has the St. Edward's crown inside a laurel wreath.

The senior RCAF non-commissioned rank was Warrant Officer 1st Class (WO1) had the British Coat of Arms.

The present CF rank insignia of Chief Warrant Officer (CWO) has a larger sized Coat of Arms of Canada  

Carl,

CPL  generally means Corporal from what I see in Documentation.

From this site on Canadian Military Abbreviations:

https://wartimes.ca/research/abbreviations/#A

• A/
  Assistant
• A/
  Acting (Rank) - higher rank held on a temporary basis - also known as a brevet rank for officers

So it could be Assistant Corporal

or Acting Corporal.  I'm guessing Assistant since Acting sounds like it's only temporary.

Any badges on the uniform ?

-G

I would say judging by the uniform and the little bit I know about this, there is no rank shown on this?

Carl,

The rank insignia of a corporal was traditionally a 2-bar chevron worn point down. 

That fits right in with the A/CPL.

-G

4SPEED427 wrote:

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Interesting, thanks. For some reason I thought all the air force uniforms I had seen had at least 2 bars but that must not be true. Private would be one bar I assume?

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 Yup Carl, your assumption is right.

Private First Class (PFC) wear a rank insignia of a single chevron pointing down.

-G

4SPEED427 wrote:

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Stephenzone wrote:

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acting usually means holding the rank awaiting qualifications. i saw he was in rivers, thats where my dad did his jump course.

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 Do you know when your dad was there?

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 Where is/was Rivers?

4SPEED427 wrote:

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Stephenzone wrote:

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acting usually means holding the rank awaiting qualifications. i saw he was in rivers, thats where my dad did his jump course.

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 Do you know when your dad was there?

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 Would have been early 60's