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Vintage RC Helicopters - Hirobo Stork - Hawk HIROBO Stork - Hawk Hirobo BBC Stork (1986)
An 'intermediate' sized trainer for a specially manufactured 46 size engine initially with a wheeled tricycle type 'aeroplane' undercarriage that allowed rolling landing. However; it proved more of a nuisance when learning to hover as the helicopter would roll over much too easily and hit the blades. An unusual feature was the belt drive for the cooling fan which was 'geared' up to run faster than on engine mounted fan making it smaller but more efficient than the standard type of layout; however, if the belt failed it would overheat very quickly causing engine seizure. This feature also gave the helicopter a unique sound when running and quite loud 'rattling' sound at idle due to the plastic clutch being driven by a plastic 'hex'; disconcerting for the owner the first time the helicopter was run up.
As can be seen above, a lot of Stork owners removed the tricycle U/C and fitted the normal skid set and Hirobo also stopped making the tricycle model. BBC Stork build manual - Full manual Hirobo Hawk (1987)
The Hawk was a slightly 'sportier' version with modified mechanics that allowed the fitting of a 'standard' layout engine (46-50 size) with crankshaft mounted fan and normal skid landing gear. Hirobo BBZ Stork (1989)
BBC - BBZ Stork part list - 1991 version with cross reference list
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