| Regimental number | 10646 |
| Place of birth | Sydney New South Wales |
| Religion | Methodist |
| Occupation | Clerk |
| Address | 43 Ormond Street, Ashfield, New South Wales |
| Marital status | Single |
| Age at embarkation | 35 |
| Next of kin | Father, J B Youdale, 43 Ormond Street, Ashfield, New South Wales |
| Enlistment date | |
| Rank on enlistment | Driver |
| Unit name | 3rd Divisional Train, 24 Company Army Service Corps |
| AWM Embarkation Roll number | 25/16/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A34 Persic on |
| Regimental number from Nominal Roll | Commissioned |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | Royal Flying Corps |
| Promotions |
2nd Lieutenant Unit: FLY Sqn 6 Promotion date: Lieutenant Unit: FLY Sqn 8 Promotion date: |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 971 Captain Alfred Clarence YOUDALE MC, No. 21 Sqn RFC, killed in action. France, 23 December 1917; 1812 Sergeant Eric Maitland YOUDALE, Pay Corps, returned to Australia, 4 July 1919; 10688 Company Quarter Master Sergeant Stanley Robert YOUDALE, 3rd Divisional Train, discharged, 24 April 1919. |