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  1. #11
    GA AVIATOR
    Guest GA AVIATOR's Avatar
    Ginge,
    Yes it did have a bigger engine to cope with the extra drag....they fitted the Konig SD930 (48hp) instead of the Konig SD570 (24-32hp depending on year of build )
    The AAN read as follows :

    AIRWORTHINESS APPROVAL NOTE NO: 20351
    APPLICANT: AMF Microflight Ltd
    AIRCRAFT TYPE: Sea Chevron 2-48
    REGISTRATION NO: G-BNHY
    CONSTRUCTOR'S NO: CH005
    Approval for the issue of a Permit to Fly for Test Purposes
    1. Introduction
    The Sea Chevron is a development of the Chevron 2-32. It differs from the 2-32 by the addition of a pair of floats, with water rudders fitment of a 48 hp Konig SD 930 engine and Konig four blade ground adjustable propeller, and as a consequence two batteries are fitted in the rear of the fuselage.
    The aeroplane is intended for export to Monaco where microlight aeroplane Airworthiness Certification is not required. The applicant has requested that flight testing be undertaken in the UK prior to shipment abroad. No certification by/or from the CAA will be sought by the applicant, and the aircraft will be removed from the UK register when flight testing has been completed.
    The weight of this aeroplane with floats, batteries and necessary instruments is 205 kg.
    2. Investigation
    The basis for the issue of a full term Permit to Fly and Type Approval of the basic Chevron 2-32 is BCAR Section 'S' advance copy date March 1983. Type Approval of the 2-32 was delayed to date as this aircraft did not meet the maximum empty weight requirement of 150 kg. This empty weight limit however will be raised to 175 kg in the near future and Type Approval of the basic 2-32 has been granted as a result.
    The design of the additional structure and the floats has been undertaken by reference to FAR 25 as a basis using information and data from the 'Design of the Aeroplane' by Darrol Stinton.
    The engine weighs approximately 30 lbs more than the 32 hp version.
    A compliance check list has been produced which makes reference to the substantiation data.
    The applicant has produced sufficient water load, structure strength and stiffness and floating attitude data for a Permit to Fly for test purposes to be issued.
    3. Flight Testing
    Initial testing will consist of slow water taxing in various conditions of wave state and wind velocity up to a maximum wave height of 6". As experience is found and if previous tests are satisfactory in suitably calm conditions faster taxing up to the point of lift off may be undertaken. Only when satisfactory lift off and water alightings have been completed, during which the affect of the floats and more powerful engine on pitch, directional and to a lesser extent the lateral stability have been assessed as acceptable may a flight test be undertaken. The ability
    to manoeuvre the aeroplane on the surface downwind must be assured at an early stage.
    The complete flight test programme must be agreed with the CAA.
    Flight testing will be by Mr K Sissons. Keith Sissons is a very experienced seaplane pilot who also flew the Catalina & B17 Sally B
    4. Limitations
    The limitations for the Standard Chevron 2-32 will be applicable to this aeroplane.
    These are:
    Vdf - 86 Kts IAS
    Va - 62 Kts IAS
    M.T.O.W - 815 kg
    Max engine speed 4200 rpm
    This must be placarded in the cockpit.
    5. Noise
    An exemption from the noise requirements will be sought by the applicant.
    6. Maintenance
    The aeroplane must be maintained to the manufacturers recommended practices and schedules during the flight test period.
    7. Weight & Balance
    The aeroplane must be weighed in its flight state and the basic weight and centre of gravity determined. A weight and c of g schedule must be prepared.
    8. Inspection
    The aeroplane has been inspected by the CAA and found to conform to this AAN. Its condition was found to be suitable for the issue of a Permit to Fly for test purposes.
    9. Approval
    Sea Chevron 2-48 Microlight aeroplane is approved for a Permit to Fly for test purposes provided that it is operated and maintained to the terms of this AAN.
    W A BEVAN
    ................................
    For the Civil Aviation Authority
    Date 17 August 1987

    Copied from http://www.caa.co.uk/aandocs/20351/20351000000.pdf


  2. #12
    Co-Pilot Ginge's Avatar
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    That must have been interesting to fly, I knew AMF had been experimenting a Limbach and a Norton engine but I'd not heard of a bigger Konig. It could have been a hell of an engine the small one was a beautiful relieable piece of kit that looked as if it had been made by a watchmaker, and the quietest aircraft engine that I have ever heard (or not heard if it was any distance away)
    I used to know Keith, he used to take us to Duxford when we did some maintenance to Sally B in the winter months. He spoke of flying the Sea Tiger but never mentioned the Sea Chevvron. A great bloke and a brillant, enthusiastic pilot, sorely missed after the accident.

    Ginge


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