ORIGINAL: rhklenke
ORIGINAL: wikman
Very easy...
A lot of fuel left in the 2,1 liter tank after 10 minutes
I would guess that you do not have a Flash... There is a small problem to use all the fuel in that tank.
We have found out that we uses half the fuel compared to a JC P120SE or JC P120 at the same flying time and type of flying.
Yes, I actually do have a Flash, with both a wing and main tank. I don't have problems using the fuel in the main tank, but I made a pleated paper filter pickup for my main tank that just about gets it all out.
As far as fuel consumption of your engine is concerned, its your engine and your data, so I'll take it with a grain of salt, but HALF the fuel consumption of a P-120SE?!? I don't think so. I read that the P-120SE was listed in RCJI as the 3rd most fuel efficient engine they've tested. Regardless, you'd have to be a genious to get that kind of improvement over a relatively modern engine without developing a turbo-fan...
Bob
Bob, fact is:
High pressure ratio (3,75) and all parts very carfully designed and optimized makes the Hawk 100R the
Nr1 most fuel efficient engine ever tested in RCJI.
You have the test here and it is not our figures it is RCJI and Tom Wilkinssons:
http://www.hawkturbine.com/res/Hawk1...reveiw_all.pdf
Compare the fuel consumption from idle to 75% of throttle with your engine and you will find that the figures are no hocus pokus! It is the result of many years of work, calculations and tests.
And the figures here are also from RCJI and also the published ones.
http://www.hawkturbine.com/res/Hawk1...litetslage.pdf
The only difference with the Hawk 100R of today is that the maximum thrust is increased to 115N.
A small guess is that the time to consume 1L of fuel at idle is not 26minutes on your P120SE!
The trick is to lower the fuel consumption at all power settings not only on full throttle. You use the full power for very short bursts only when flying. Most of the time the power setting is between idle and 70 % thrust.
In that area the Hawk 100R is outstanding due to high pressure and a compressor that is designed for the engine only.
Belive it or not, this is the fact and the engine is available on the market!
You could try to not use the wing tank in your Flash and fly for 9 minutes! Possible?
The video on the web site is with the main fuel tank only. Look for your self.
Regards
Anders