Climb and glide with the Jet is NOT optimal...

The best speed for the Jet engine is probably over 200 knots (!)....
and whilst this is not possible, the faster the better... so after
briefly climbing away from a field, it is better to accelerate to 80-90
knots and then dolphin-fly, varying speed in accordance with any
residual lift (these is always some)... This technique will produce
the best range...

Craig

At 19:02 06 June 2015, jfitch wrote:
On Friday, June 5, 2015 at 3:15:06 AM UTC-7, Craig Lowrie
wrote:
The HPH Shark takes 28 liters of Jet A1 + 4% Aeroshell 500.
That will=20
give about 55 minutes cruising at 80-90 knots... The technique
is not=20
climb and glide, rather dolphin flying... pulling up in any
residual=20
energy and in notime you have gained quite a lot of height... It
works. =
=20
Typically The Shark Jet will do 170km on a tank. The FES
version will do=
=20
about 100km, whilst the Shark MS (Self Launcher) will do over
300km=20
on a tank...
=20
Craig
=20
At 08:30 05 June 2015, wrote:
"Gobble as well as gulp...with Jet A at +/- $5 a gallon and
AeroShell=20
560
at $15 a quart that works out to north of $100 to fill up the
JS-1"

Well......you could certainly calculate a worst case scenario
like
that.=
=20
But as 11USG of Diesel / 2-stroke (4%) oil mix is flight
manual=20
approved,
this may be a more commonly employed option.=20

(US prices: 10.6USG @ $2.70 + 0.42USG & $20) is $37. =20

Glider pilots: Tighter than a fish's a....... :P


For reference, an ASH26E uses about 2 liters for a warm up and
climb to
250=
0 ft agl, and will do 680 Km on its 16 liter tank (according to the
book -
=
never had a retrieve that long!). To do that you climb to altitude
limits
t=
hen fold the engine and glide, and repeat as needed. Is the climb
performan=
ce on a jet significantly better so that the climb and glide
technique
impr=
oves retrieve range over a level cruise?