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I guess it depends on what you term slow flight. If we're talking 100 mph instead of 105, that's one thing. But, to try and maintain 75 mph, I think we're going to create more heat and burn more fuel (per mile) than at a faster easier speed. Larry ----- Original Message ----- From: "Hartmut" <[EMAIL PROTECTED]> Cc: <[email protected]> Sent: Wednesday, December 04, 2002 5:37 PM Subject: Re: [COUPERS-FLYIN] Slowest Cruise Speeds > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > So how then can you safe on fuel in a slower flight ? > When you burn less fuel, engine generates less heat. > > We are talking RPM settings fom around 1900 low and 2500 high.(depending on engine - prop combo) > > When you get behind the power curve (45 MPH) I can see the adverse effect described. > > Hartmut > > MAGIC VAC wrote: > > > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > > I have to agree with this assessment Hartmut. In slow flight, your engine > > will be working harder just to maintain altitude. Once you drop a few > > hundred rpm, you have to increase the throttle just to maintain that lower > > rpm setting. Kinda like walking on a treadmill. Increase the climb angle, > > and you work harder, but you're still just maintaining the same altitude. > > > > Larry > > > > ----- Original Message ----- > > From: "Gordon Tanner" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]>; <[email protected]> > > Sent: Wednesday, December 04, 2002 4:13 PM > > Subject: Re: [COUPERS-FLYIN] Slowest Cruise Speeds > > > > > ----[Please read http://ercoupers.com/disclaimer.htm before following any > > advice in this forum.]---- > > > > > > > > > One aspect of prolonged slow flight is insufficient engine cooling due to > > > the extreme nose high attitude. Aircraft with cowling flaps are generally > > > OK if the cowl flaps are open during this type of operation. Without > > extra > > > cooling capacity, the back cylinders will slowly cook. It can result in > > > excess carbon in the cylinders, due to the lack of cooling & slow RPM. One > > > of the first indications is excess "varnish" on the inside of the valve > > > covers. > > > > > > If you would like to join your friends, I have a nice Challenger II here > > in > > > northern California.....that is for sale, or trade for a coupe. > > > > > > Gordon Tanner [EMAIL PROTECTED] > > > > > > > > ========================================================================== == > > == > > > To leave this forum go to: http://ercoupers.com/lists.htm > > > > > > > ========================================================================== == == > > To leave this forum go to: http://ercoupers.com/lists.htm > > ========================================================================== == == > To leave this forum go to: http://ercoupers.com/lists.htm > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm
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