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What can we use for « Prag resolution # 2 » ?. Or : How to use the facts and figures about safety from the most liberal UL regulation system in Europe ?. The idea was :. From microlights: We have good safety records We have this without heavy rules We achieve it without certification

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what can we use for prag resolution 2

What can we use for « Prag resolution # 2 » ?

Or :

How to use the facts and figures about safety

from the most liberal UL regulation system in Europe ?

the idea was
The idea was :
  • From microlights:
    • We have good safety records
    • We have this without heavy rules
    • We achieve it without certification
  • From homebuild acft:
    • It can be used to help designing a new acft category up to 600 kg.
initial assumption for uls
Initial assumption for ULs:
  • We reached a 50% 3-axis / 50% trike ratio.
  • « Heavies » (their empty weight limits them to 156kg payload) 3-axis are the huge majority.
  • The 3_axis fatalities are only very slightly higher than the trikes’ one.
so we can
So we can :
  • extrapolate a light regulation for a new 600kg acft category with reasonable success probability.
  • Defend annex II
what i found out
What I found out :
  • Twice more 3-axis than trikes:
    • so the fatality per number of acft (or flying hours) may be better for 3-axis.
  • if majority are « heavies »:
    • « heavies » may not be more dangerous
    • A new category could be safe with light regulations.
then i cheked the initial datas
Then I cheked the initial datas:
  • I took the F- microlights listing from the FFPLUM.
  • I considered the 2500 first UL sorted by alphabetical order of owner name.
  • I sorted them by official « sophistication »
    • Problem : in France, having a BRS qualifies an UL as « sophisticated » (like in-flight variable pitch propeler or retractable gear).
slide7
I sorted them by weight :
    • Light : more than 156kg payload.
    • Heavy : 156kg payload
slide8
Even if we all read and hear « modern-high perf-heavy microlights » are 80% of the sales,

The reality is :

  • More than 80 % of the ULs flying in France are light and / or simple design.
next step
Next step :
  • Going back to the fatal accident datas with this new criteria:

Result :

  • Light 3-axis are as safe as trikes.
  • Heavy 3-axis have 3 times more fatalities than the « lights or simple » ones.
  •  we will have to be very carefull before feeding EASA with datas.
about homebuilt acft
About Homebuilt acft
  • Limited to 4 seats.
  • Night / IFR only if certified engine/maintenance
  • Thrust limited for Jets to (more thrust on special request).
  • Can be really heavy!
  • Aerobatic, glider towing, etc
  • No commercial use
  • Flown with a PPL
assumption
Assumption:
  • Majority are of complex design
    • (you don’t spend thousands of hours to build a « 2 CV » you can buy for cheap, you build the Ferrari you can’t afford!)
  • They enjoy a declarative system with plan and stress analysis checked by CAA.
  • They have good safety records.
verified
Verified :
  • Majority is of complex design : YES
    • (They like Ferraris!)
  • Declarative system is the rule : YES
    • (any pilot « with sufficient experience » may be entitled to fly test the new born bird)
  • They have good safety records : YES
    • (Comparable to Aeroclub certified acft).
benefit from the homebuilt acft
Benefit from the homebuilt Acft:
  • You don’t need certification to be safe.
  •  calls for a new question:
  • What about the pilot?
ppl pilots
PPL PILOTS
  • Comparison Owners vs Airclub pilots
  • Fédération Française Aéronautique
    • More than 45000 pilots : 15hrs/year
  • Owners :
    • 2000 pilots : 100 hrs / year
    • THEY BOTH CAUSE 50% OF THE ACCIDENTS.
why this difference
Why this difference ?
  • Average instruction hours flown by an airclub PPL pilots / year : 3 hours
  • Average instruction hours flown by an owner PPL pilot / year :
  • 1 hour every second year to validate its PPL !

 Because the airclub pilots are flying in an organized structure.

conclusion for uls
CONCLUSION FOR ULs:

NO NEED OF ANY CERTIFICATION.

NO NEED FOR HEAVY LICENSING

NO NEED FOR MEDICAL

conclusion for a new class heavier than uls
CONCLUSION FOR A NEW CLASS HEAVIER THAN ULs :

NO NEED OF ANY CERTIFICATION.

A NEED FOR AN ADAPTATED

LICENSING / TRAINING

(compared with ULs)

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