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Gas Turbine Builders Association |
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WASP_1 |
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| Diameter | 95mm |
| Length | 175mm |
| Thrust | 81 Newtons (18 lbs) |
| Max revs | 148,000 rpm |
| Temp | 575 deg C |
| Weight | 1186 grams. with starter motor |
| Fuel consumption | 200 grams/min ( @ 18lbs thrust) |
| The committee of the GTBA wish to advise that the specifications indicated in this page are currently unverified. We are aware that the designer is working on some essential modifications to overcome a number of known technical issues. Anyone interested in building this engine should seek clarification from the designer, Phill Heward, prior to making a final decision. |
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Historic information |
| The WASP_1 prototype first ran in March 2005. It was visualised to fill the gap between the MW54 and KJ66 but turned out with similar thrust to the KJ66 with a smaller case size. Designed and developed by Phillip Heward. |
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Design This entirely new engine has been designed by Phill Heward to neatly fill the gap between the MW54 and KJ66. All parts are available individually or sold as a complete engine. The well drawn plans are supplied with a detailed written set of instructions and makes a welcome addition to the list of home built engine designs. The engine is based on the 60mm diameter Garrett compressor wheel and a completely new design 60 mm diameter cast axial turbine wheel.
Materials The front of the engine is alloy with the drawings for an electric starter. The case is made from wrapping stainless sheet into a tube and spot welding the seam. The compressor wheel is available from Phill (as are all parts). The combustion chamber is stainless steel (UK 316 spec) the NGV assembly can be fabricated or a cast stainless steel one purchased. The cast Inconel 713 turbine wheel used is a special wheel available from Heward microjets. The shaft is made from EN24T. Compressor The Compressor is a 60mm diameter Garrett 9096-14 Turbine wheel Modern engines require a cast turbine wheel. This engine uses a new
design wheel developed by Heward microjets. Bearings The engine uses the ISO 688 full complement ceramic ball race from GRW and the same bearing is used at both ends of the engine. The bearing tube is aluminium. WASP_1 This is a completely new engine design from Phill Heward who already has several good designs under his belt, The most noticable change for Phill is the move to an Axial turbine. It is straightforward to build and has several revolutionary features The combustion chamber uses front vaporiser sticks which are shaped to maximise vaporisation. Fully floating shaft and a completely new concept Turbine wheel. Phill will be on hand to answer any questions on his forum at http://groups.yahoo.com/group/TheJetSet/ or on the GTBA forum at www.gtba.co.uk/gtba_forums
Plans are available on-line from Heward microjets at http://www.heward-microjets.co.uk and as an extra convenience, the plans can be emailed to you in the form of an Adobe PDF document Cost £20.00. They can also be shipped in printed format (see below) email Heward microjets for more details. email heward.microjets@gmail.com Printed plans direct by post from Phill Heward.. 23 The Moorlands, Metheringham, Lincoln. LN4 3HX UK. Cost £20.00 plus pp |
