This may not be the most popular suggestion, but what about charging a £5 a year registration fee to all PPRUNE users? With over 15000 registrations, that equates to £75000 a year. If this fund had been started 5 years ago there would be £375000 in the pot by now, enough to fund almost 15 ATPLAs at todays prices.
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Remember: all landings are controlled crashes!