cdewey6969(at)yahoo.com
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 Posted: Mon Oct 09, 2006 7:02 pm Post subject: Lightning- Bigger Engine |
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Has anyone heard about the possibility of putting an
eight cylinder engine in the Lightning? Charles
Dewey
--- nick otterback <vettin74(at)yahoo.com> wrote:
| Quote: | I belive the statement of terminal velocity in this
case is used in the wrong context....it was found
during testing with the esqual that a "Stock"
aircraft...all of their items no after market stuff;
gearleg, pressure recovery wheel pants,ect....that
the aircrafts total darg would not allow the
airframe accelerate much past 195 IAS at any
altitude not that TAS was higher ...and not taking
in to account the static system errors but the IAS
would not accelerate.....now i did do alot of
testing poweron ...below redline RPM and at idle
...the only differance is it took longer and a
steeper angle at idle.......the hybrid would go to
about 210 but not much more .....and the prototype
lightning will find the end of ASI without any
problem...245IAS....VNE is not related to the
aircrafts drag curve directly it may be mearly that
the nubers are the same....but not related .....it
is just that the airframe can not accelerate past
that AS in its current form......the prototype is
clean enough to fly that fast with out induced drag
being much of limiting facor but the aircraft lacks
the power to pull it much past 205 in level flight
.....I am sure this sheds some light but more than
likley opens up another can...
Nick
N1BZRich(at)aol.com wrote:
In a message dated 10/8/2006 12:42:55 P.M.
Eastern Daylight Time, dashvii(at)hotmail.com writes:
It was at an altitude of about 12,000 feet
starting, power to idle, nose
down to about 30 degrees and then steeper. I
couldn't get anymore out of it
with power at idle.
So the total drag of the Esqual you were flying
was the real culprit. Total meaning wings,
fuselage, gear leg fairings, wheel pants, cowling,
etc. Also, with the engine in idle with the prop
wind milling would add to the drag total as well.
It would have been interesting to do the same test
in 424EA - the hybrid Esqual with the Lightning
wings. But I certainly agree with your bottom line
that the Lightning wing is a considerably lower drag
wing than the Esqual wing.
Buz
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