Fuel Burn for Rotax 914

[saraf]

Hi Can anybody tell me what the fuel burn is for the Rotax 914 at full power?

[t-bird]

Baie minder as die Subaru

[mak]

Eben

At full throttle with turbo engaged it is 34 litre. I hope the same amount of poo your baby give you in a day

[Learjet]

http://www.kodiakbs.com/engines/4sf.htm

[Condor]

I know is this is not a scientifically verified result, but flying to Gariep recently in my Magni M22 and being 1-up, I noticed a fuelburn of 17l/hour at 5000rpm for long streches, flying at 28" manifold pressure.

I did a rough recon and this is very much in line with the total fuel burn for the trip.

Will check again flying to Alldays.

[Vertical Tango]

Mak, you are not flying a 914. In a Xenon with a 914, 28 l/hr on take-off, cruise 1 up 18 l/hr, loaded 22 l/hr. That's while using the best fuel computer on the market !

[justin.schoeman]

A simple way to get a good idea of fuel consumption:

Take the power (hp) and multiply by 0.3 gives you liters per hour.

eg. 115hp * 0.3 = 34.5lph

For something really efficient like a Prius, or new FSI engines, you can use 0.24 (instead of 0.3). But 0.3 will get you pretty close for just about any carburetted petrol engine...

[BONZAI BELL]

I need to install a fuel flow system in my gyro. What should i buy , and who do i contact ?
Cheers
Swannie

[mak]

Mr Vertical Tango, I don't trust your figures, I think you need to fly to Alldays to proof it to me and if found to be correct we can celebrate

[lion]

I need to install a fuel flow system in my gyro. What should i buy , and who do i contact ?
Cheers
Swannie

Swannie, I have a brand new one for sale - will phone you later.

[M I Claase]

Eben dit lyk nie of iemand jou kan antwoord nie want n 914 kan net n paar minute in volkrag loop (anders word die turbo te warm of dalk is die brandstof pype te klein om by te hou met brandstof voorsiening) dan moet jy terugkom op jou kragstelling dus gaan dit moeilik wees om syfers te kry. Wat ookal die anwoord is kom dit nie naby die Subaru nie. Julle daar by SARAF moet begin dink aan air to air refeuling vir ons Rafs! Dis lekker om krag te he maar dit kom teen n prys!

[Vertical Tango]

Mak, it is very simple to prove. You need first of all to know well your fuel tank, i.e. a marking at every litre. If your fuel computer tells you exactly what you have in your tank after a flight, meaning it is correctly calibrated, then you can trust 100% the figures it gives you in flight, unless the make you use has bugs !
The figures I gave are the ones I read in flight and after landing, I am always at 1% precision. Therefore they are correct.

[saraf]

Thanks to all for the info , much appriciated

[Vertical Tango]

By the way, the Optifuel amongst other things has an input for fuel injection and does not require then a flow sensor. I am thinking of the Subaru engines.

[BONZAI BELL]

I have now also heard that the Magni , not sure about the other makes , have a return pipe to the fuel tank. I would imagine for excess fuel.
Now , if this is true, does the fuel flow meter calculate fuel returning to the tank or not?