Recent content by Niels

Thank You for an interesting read. Around 39 kg per litre being a prechamber diesel and 240 gram per kWh. As gasoline engine it will need around 22kg per litre at same power level and have same fuel consumption. Diesels may have a place in military but not in homebuilts where you drive to...

And a 80 horsepower 2400

Two pictures showing a 160 horsepower 2000 rpm

Two pistons in V90 configuration will together pump more or less the same as a single piston. A single piston pumps air more or less corresponding to a mean effective pressure of 10 bar. That means that if turbo is not well we still l have air for 40 to 50 horsepower.With a chainsaw carburettor...

A longitudinal size comparison of a V2 twostroke doing same job as a Rotax 912

Rotax 912-915 is the yardstick. An inverted Two-stroke V2 with 100m bore and 150mm stroke can deliver 80 to 120 horsepower at 40 rps without undue stress and is shown superimposed on a 912 to same scale

Somewhat higher but not a lot RF4 is 390 kg to 11.3m span and Luciole is 200kg to 6.9m span

Lovely plane but what can it do that a Luciole can not?

Figther efficiency can be measured as number of kills per enrolled aircrafts and the FokkerXXI was very good. Dutch FokkerXXI

A mr Rutan once said that he was never going to design another pusher design. Propellers like fresh undisturbed air

No not completely. A single cylinder with a counter-rotating shaft still has a lot of second order up and down forces. For each crankshaft revolution you get two complete cycles and they are not insignificant. On an opposite they cancel out.

Interesting. Kurt Tank is acclaimed as having made worlds best air cooled radial installation on FW 190. It seems he could not leave it alone. The Concord came down due to a small piece of american scrap so would not the inlet here be problematic? In a well develloped stall the placing of air...

We have an aircraft with say 80 hp/80 kg engine and prop(Rotax maybe.) We substitute with two of these 27 kg/65hp enginerators and a 20kg propmotor. The Rotax crusing of 65 hp can be done by both at half power and if one fails we are still relative safe. At half speed/power these snowmobile...

Yamaha or not, my fingers are itching to see drawings or crosssections of engine and generator. Does anything from the Blast engine exist? Two of these enginerators can be placed side by side and running sychronised.Very little vibration. If one stops an electric counter balancer neutralises...

The Emrax 188 generator is 7 kg and much of this can substitute flywheel and flywheel cover of the 23 kg Yamaha/Arctic cat engine. A well engineered combination will be less than 27 kg. 65 HP/48kW. Two of these enginerators and a Emrax 268motor of 20 kg can outperform a O-320 in most situations.