Many plot holes, but let us focus on the big question, what is a Bluewing 'Jupiter'? My guess is that Bluewing is "Boeing". They sound kind of similar after all.

Story is that a friend of Biggles' sends a letter telling him about some roughs trying to muscle him out of his business in northern Canada. Biggles to the rescue. ( )

Biggles krijgt een brief van zijn vriend Wilkinson. Deze schrijft dat hij in flinke problemen zit. Daarop brallen Biggles, Ginger en Algy te vertrekken naar Canada, waar ze al snel te horen krijgen dat Wilkinson vermist wordt. ( )

Thoroughly enjoyable Biggles adventure set in Canada, complete with gold prospecting, fights with polar bears and wolves, and aeroplane dogfights! ( )

I remember buying this and a few other French-translation Biggles volumes in this series in a bookshop in Lyon at the time of my 50th birthday.