| Type: | GP |
| Country: | Belgium |
| Grand Prix: | Frontières |
| Date: | 25 May |
| Year: | 1947 |
| Official Name: | XVII Grand Prix des Frontières |
| Location: | Chimay, Belgium |
| Course: | Temporary street circuit |
| Course Length: | 10.87km (06.75miles) |
| Distance Laps: | 12 |
| Distance Length: | 130.44km (81.05miles) |
| Fast Driver: | B. Bira |
| Fast Team: | Maserati |
| Fast Time: | 4:37 |
| Fast Country: | Siam |
| First Driver: | B. Bira |
| First Country: | Siam |
| First Team: | Maserati |
| Second Driver: | Peter Monkhouse |
| Second Country: | GBR |
| Second Team: | Bugatti |
| Third Driver: | Louis Rosier |
| Third Country: | FRA |
| Third Team: | Talbot-Lago |
The 17th Grand Prix des Frontières was a Formula Libre motor race held on 25 May 1947 at the Chimay Street Circuit in Chimay, Belgium. The Grand Prix was won by B. Bira in a Maserati 4CL. Bira also set fastest lap. Peter Monkhouse finished second in a Bugatti Type 51 and Louis Rosier was third in a Talbot-Lago.[1] [2]
| Pos | No | Driver | Car | Time/Retired |
|---|---|---|---|---|
| 1 | 2 | B. Bira | Maserati 4CL | 59:10, 132.28 kph |
| 2 | 14 |  Peter Monkhouse | Bugatti Type 51 | +2:00 |
| 3 | 27 |  Louis Rosier | Talbot-Lago Spéciale | +3:12 |
| 4 | 22 | Lex Beels | Alfa Romeo 8C 2300MM | +3:13 |
| 5 | 32 | Roy Salvadori | Alfa Romeo P3 | +4:23 |
| 6 | 38 | Henri Trillaud | Delahaye 135 | +5:11 |
| 7 | 24 |  Harry Schell | Cisitalia D46 | +1 lap |
| 8 | 10 | Tony Rolt | Aitken-Alfa Romeo | +1 lap |
| 9 | 44 |  "Lucky" | Alfa Romeo 8C-2300MM | +1 lap |
| 10 | 26 | Raymond de Saugé | Cisitalia D46 | +1 lap |
| 11 | 34 | "Freige" | Monnier-Fiat | +2 laps |
| 12 | 28 | Ted Lund | MG PB | +3 laps |
| NC | 33 | Michel Roumani | Bugatti Type 35 | |
| Ret | 6 | George Abecassis | Bugatti Type 59 | 5 laps |
| Ret | 40 | Gabriel Lascaut | Salmson | 4 laps |
| Ret | 36 | Yves Giraud-Cabantous | Delahaye 135 | 4 laps |
| Ret | 20 | Arthur Legat | Bugatti Type 35B | 4 laps |
| Ret | 16 | John Bolster | ERA | 3 laps |
| DNS | 8 | "Vandervecken" | Alfa Romeo | |
| DNS | 12 | "Steinbach" | Alfa Romeo 2900B | |
| DNS | 30 | Serge Pozzoli | Delahaye 135 | |
| DNS | 48 |  Guido Barbieri | Maserati 4CL | |
| DNS | 52 |  Joe Kelly | Riley | |
| DNS | 56 | Raymond Sommer | Maserati 4CL | |
| DNS | 58 | Henri Louveau | Delage D6 | |