On Sep 29, 5:01=A0pm, "William R. Mattil" <wrmat...@[EMAIL PROTECTED]
>
wrote:
> robinlebl...@[EMAIL PROTECTED]
wrote:
> > Hello,
>
> > I=92m planning to buy/or build a jet during the winter, but as you may
> > have notice, there is not very mush information on the net about
> > this. =A0Is any of you have very good website which talk about jet,
> > turbine, price, operation of, trick and advice ?
> > Or is there any of you who may have nice advices?
>
> > (For your information: I=92m flying since more then 14 year, I
actually
> > fly an Extra 300 (64=94) wingspan and I do some basic 3D, =A0I build
mo=
re
> > then 10 airplanes, so, I=92m not a beginner in RC, but I surely is in
> > Jet RC. =A0I already know that it cost a lot more, but how exactly, I
> > don=92t know=85 =A0I did not found a lot of manufacture of turbine and
=
I
> > have no idea which one is the best nor why=85 =A0So as you can see, I
m=
ay
> > need a lot of information=85)
>
> Robin,
>
> Jets come in a couple of varieties. First of all there are turbine
> operated trainers or basically low performance versions that you can
> utilize to get used to flying them. They fly like conventional aircraft.
> More on this later.
>
> Then there are more or less, scale jet models that are powered by Jet
> Turbines. These do not fly like conventional aircraft.
>
> In general a Turbine producing 14 pounds of thrust will be about $3,200
> or so. Fini****ng a beginner kit can be about $1500.00 and one of the
> Scale variants can run $3000 or more. So in general expect to spend
> about $4500.00 to $7000.00 or so. Yes they can built cheaper. But when
> you consider something that is capable of the speeds these things travel
> it isn't wise to select cheap hardware.
>
> Flight Characteristics. Two Words. Turbine Lag. It's a fact of life and
> you have to learn to fly these things throttled up. Because if/when you
> need power to avoid a problem, it's 2-3 seconds away. And to a pilot
> that's a lifetime. Speed is another biggie. These things generally, at
> least in semi-scale and scale, fly fast and land fast. Takeoff speed is
> generally faster too. And as a rule the scale varieties like paved
runway=
s.
>
> My TamJet A-4, powered by a Jet Cat P60 takes roughly 360 feet of
> pavement to rotate, and gains altitude slowly until appx 70mph or
> better. Full tilt it will do about 140 mph and lands at about 60 with
> 30% flaps. It *will* fly slower but there isn't any room for error when
> doing so. It also drinks fuel at a pretty good clip and is borderline at
> 6 minutes of flight time. This could be extended with a functional
> centerline fuel tank and another 50 oz of Jet A but then it needs more
> runway. It's a slippery slope.
>
> Additionally these need a lot more sky as a rule.
>
> Jet trainers don't suffer from most of these quirks and can also be very
> enjoyable to fly if the non prototype appearance doesn't bother you.
>
> EDF can also be a way do go. But personally I like the smell of Jet A in
> the morning. <g>
>
> Regards
>
> Bill- Hide quoted text -
>
> - Show quoted text -
William, thank you very much, it was a very good explanation...
I planning to meet someone arround here who is having a jet since a
while, I will get more information from him.
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