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Tethered Hydroplane Classes and British Records

Naviga A3

NAVIGA International Classes. Current Records

A1 up to 3.5cc     1.2kg    Ex Dia 7.0mm Rashid Chabibulin 06/08/2016 213.777kph (132.75mph)
A1E Electric          1.2kg  42v Max Oleksi Smolnikov 29/07/2018 235.602kph (146.31mph)
A2 up to 7.5cc     2.0kg   Ex Dia 8.0mm Vladislav Subbotin 26/08/1999 218.871kph (135.92mph)
A3 up to 10cc      2.5kg   Ex Dia 10mm Vladislav Subbotin 05/07/2004 232.259kph (144.23mph)
B1 2.5cc airscrew 0.75kg Ex Dia 5.0mm Babken Shahazizian 30/07/2017 284.360kph (176.58mph)
B1E airscrew       0.75kg  42v Max Farid Ishmetov 30/07/2017 273.556kph (169.87mph)

MPBA 'International' Classes. Current Records

A1 Pete Dirs 13/08/17 122.64mph
A1E Angela Gullick 30/07/22 136.35mph  New Record
A2 Roger James 3/08/03 129.30mph (Set with 6.5cc motor)
A3 Norman Lara 06/07/14 141.70mph
B1 Jim Free  10/04/00 154.91mph
B1E Angela Gullick 11/06/21 120.68mph
Pete Dirs Roger James Norman Lara The late Jim Free

MPBA British Classes. Current Records

Sport 40 E Martin Broad 20/07/14 111.29 mph
Sport 40 IC Stuart Falconer 03/09/22 119.75 mph New record
B1 Sport Jim Free 28/05/17 128.48 mph 
B1E GB     No record established
B Ron Hankins 19/06/16 124.76 mph 
B/S 9lb Stan Poyser 02/08/98 96.67 mph
A John Hyder 08/10/00 130.05 mph
A/S Paul Windross 07/07/13 129.33 mph
B/R Ron Hankins 03/09/22 139.11 mph  New record
Vintage Not applicable to this class. Lambert Trophy awarded for the fastest speed recorded each season
Ron Hankins The late Stan Poyser Angela Gullick

John Hyder

Paul Windross Left: Martin Broad

British Classes

A1              1.2kg  Waterscrew up to 3.5cc. Straight fuel.  *All waterscrew classes must run with silencers*
A1E          1.2kg Electric Max 42V
A2          2.0kg 3.5cc to 7.5cc  Straight fuel
A3            2.5kg 7.5cc to 10cc   Straight fuel
B1            0.75kg 2.5cc airscrew  Straight fuel 5.0mm max exhaust dia
B1E          0.75kg Electric airscrew, max 42v     
B1E GB      0.85kg Electric airscrew, max 42v   
B1 Sport   2.0lbs £90 limit on motor, 5mm exhaust outlet, commercial propellers. Free fuel
Sport 40    4.0lbs 6.5cc side exhaust 2-stroke. 10cc 4-stroke . Commercial components Free fuel
Sport E      4.0lbs 6 cell 22.5v electric
B Class     8.0lbs Up to 15cc homebuilt engines.  Free fuel
B/S Class 9.0lbs Steam powered, all up weight not to exceed 9lbs.
A Class    16.0lbs Up to 30cc homebuilt engines.  Free fuel
A/S Class 16.0lbs Steam powered, all up weight not to exceed 16lbs.
B/R            6.0lbs Commercial engines up to 15cc. Free fuel
Vintage Waterscrew or Airscrew, pre 1963 boat or design with engine of contemporary date.
Sport 40 Electric Vintage
Commercial engine 'Sport 40' 15cc from castings 'B' 30cc from bar stock 'A' Poppet valve flash steamer 'A/S'

Records are correct at 01/02/21. Thanks to Norman Lara. Photos Late Jim Free, OTW, Sonia and Tony Collins.