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The ADI Bumble Bee (sometimes Hollmann Bumble Bee) is an ultralight gyrocopter marketed by Aircraft Designs Inc (ADI). It was the first of its kind when it flew in 1983 and is still available in plans form for homebuilding.
It was designed by Martin Hollmann after a back injury (sustained in the crash of the ADI Condor) prevented him from flying his previous design (the ADI Sportster) on account of not being able to lift the rotor assembly.
Design and development
The Bumble Bee is a simple and lightweight design that can be built to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of . The aircraft has a standard empty weight of .
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General characteristics
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|length ft=10
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|height ft=7
|height in=6
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|empty weight lb=213
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|gross weight lb=500
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Powerplant
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|eng1 number=1
|eng1 name=Rotax 447
|eng1 type=2-cylinder air-cooled 2-stroke in-line piston engine
|eng1 hp=40
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|prop blade number=2
|prop name=fixed-pitch propeller
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|rot number=1
|rot dia ft=23
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- Blade section: - root: NACA ; tip: NACA -->
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Performance
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|max speed kts=49
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|range nmi=56
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|ceiling ft=16000
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|climb rate ftmin=1500
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|disk loading lb/sqft=1.2
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