This list of questions and answers is in no particular order. We will keep adding to it as common questions arrise from emails and phone calls etc. 

  Can you explain a bit more about the fuel ring construction?

for the main fuel ring, the I.D can be 3 or 3.2mm. we use 304 stainless tube for it but its harder to roll and drill which is why I suggested using brass in the manual.

The bearing feed pipe is a bit confusing. its made up of two seperate tubes one inside the other. the 0.9 O.D tube has an inner diameter of 0.5mm. then there is a peice of 0.4 O.D tube inside it to act as a restrictor. for this inner piece you can either use 0.4mm tube or 0.4mm wire. then adjust the length of the inner tube to control the flowrate.
The tubes should all be hypodermic stainless steel appart from the 4mm O.D brass.

The 0.9 O.D tube is the same for the bearing supply outer tube and the injectors.

  Do I need to balance the shaft assembly if I buy the kit?

No, the kit will include the shaft assembled with the turbine spacer, rear bearing, turbine wheel, and nut. pre balanced and ready to be fitted into the shaft tube. As soon as we can manage it, we will offer a service of balancing the complete rotor assembly while fitted in the engine.

  Do You accept payment through paypal?

Yes we do. we have a business account set up using the email address anna@heward-microjets.co.uk

  Are all the parts available for the Wasp?

everything is available except for the turbine wheels. We are eagerly waiting for them to emerge from the foundry and clear xray inspection. We hope to have them from mid August.

  Is this a full time job or a part time hobby?

Its most definately a full time carreer, We don't do anything else with our time other than develop and produce gas turbines. We are currently working a minimum of 6 day weeks with an average of 14hr days at our workshop.

  Why is there no price given for the H80?

Because this is such a versatile design for may large airframes, each customer requires something a little different to the standard model. as a guide, the H80 retails at between £5,000- £6,000 for the complete package. 

  Why are the Wasp burners shaped like that?

Because The intention was to cause as much turbulence (and therefore as much mixing and heating) of the fuel/ air  in as small a space as possible, the two sharp 180 degree bends do that very nicely. Also I do not like to copy other designs without trying to come up with a workable alternative from my own head.

  Is the H400 a serious engine or just an experiment?

Its a serious project with several confirmed orders, Clients have visited our factory to see the Altair running, and went away very happy that it will perform as expected.