Fuel Injection and Variable Timing

wrote in message
oups.com...
Matt wrote "


Even some of the stone age stuff is improving.

http://www.radialengines.com/fuel_injection/index.htm


Thanks Matt, I always wonder why it takes sooo long for a simple idea
to get put into motion. 11,000 - 12,000 grand seems high but The "FAA"
blessing accounts for more then half of it I bet.

Probably 80%+; most of it is off the shelf parts, but when you put all those
OTS part together, in an FAA bureaucratic world....

wrote in message
oups.com...
Matt wrote "


Even some of the stone age stuff is improving.

http://www.radialengines.com/fuel_injection/index.htm


Thanks Matt, I always wonder why it takes sooo long for a simple idea
to get put into motion. 11,000 - 12,000 grand seems high but The "FAA"
blessing accounts for more then half of it I bet.

Combine the above with, say, this: http://www.wacoclassic.com/sales.html

I think I've found my next Big-Boy-Toy :~)

The continuous injection causes gas vapors to build up while the valve is
closed, and these vapors tend to float into the intakes of the other
cylinders. This is why the rear cylinders burn richer than the front in
typical 6 cyl fuel injected aircraft engines. The sequential injection in
car engines eliminates this problem. The fuel injected aircraft engine is
not much better than, if not worse than, the central ( throttle body )
injection system.

"Capt. Geoffrey Thorpe" The Sea Hawk at wow way d0t com wrote in message
news:Y4qdnUbiTJtM6OrZnZ2dnUVZ_sidnZ2d@wideopenwest .com...
"J. Severyn" wrote in message
...

"karl gruber" wrote in message
...

For the most part, only diesel engines have direct injection.

...
But there are a few new gasoline engines that do use direct injection.
The
...
It would be nice to see this technology transferred to aero engines as it
looks like it improves fuel economy and gets more power for the same size
engine. Well, don't hold your breath....unless you jump over to
rec.aviation.homebuilt

The fuel economy improvements are seen at lighter loads. At aircraft type
loads (60+%) and at altitude you can't run lean and/or stratified so you
don't gain much economy.

The improvment in power from the increased volumetric effciency and charge
cooling would still apply.


Geoff.

Sox,

It's just the opposite.

The front cylinders run richer than the rear.

It's called "the occult migration of fuel!"

Karl
"Curator" N185KG
Gami ser# 0019


"soxinbox" wrote in message
...
The continuous injection causes gas vapors to build up while the valve is
closed, and these vapors tend to float into the intakes of the other
cylinders. This is why the rear cylinders burn richer than the front in
typical 6 cyl fuel injected aircraft engines. The sequential injection in
car engines eliminates this problem. The fuel injected aircraft engine is
not much better than, if not worse than, the central ( throttle body )
injection system.

"Capt. Geoffrey Thorpe" The Sea Hawk at wow way d0t com wrote in message
news:Y4qdnUbiTJtM6OrZnZ2dnUVZ_sidnZ2d@wideopenwest .com...
"J. Severyn" wrote in message
...

"karl gruber" wrote in message
...

For the most part, only diesel engines have direct injection.

...
But there are a few new gasoline engines that do use direct injection.
The
...
It would be nice to see this technology transferred to aero engines as
it looks like it improves fuel economy and gets more power for the same
size engine. Well, don't hold your breath....unless you jump over to
rec.aviation.homebuilt

The fuel economy improvements are seen at lighter loads. At aircraft type
loads (60+%) and at altitude you can't run lean and/or stratified so you
don't gain much economy.

The improvment in power from the increased volumetric effciency and
charge cooling would still apply.


Geoff.

I guess it would depend on the engine. Mine feeds intake air front to back,
so that some of the vapor rich air from the front cylinder feeds the middle
and rear cylinder.

"karl gruber" wrote in message
...
Sox,

It's just the opposite.

The front cylinders run richer than the rear.

It's called "the occult migration of fuel!"

Karl
"Curator" N185KG
Gami ser# 0019


"soxinbox" wrote in message
...
The continuous injection causes gas vapors to build up while the valve is
closed, and these vapors tend to float into the intakes of the other
cylinders. This is why the rear cylinders burn richer than the front in
typical 6 cyl fuel injected aircraft engines. The sequential injection in
car engines eliminates this problem. The fuel injected aircraft engine is
not much better than, if not worse than, the central ( throttle body )
injection system.

"Capt. Geoffrey Thorpe" The Sea Hawk at wow way d0t com wrote in
message news:Y4qdnUbiTJtM6OrZnZ2dnUVZ_sidnZ2d@wideopenwest .com...
"J. Severyn" wrote in message
...

"karl gruber" wrote in message
...

For the most part, only diesel engines have direct injection.

...
But there are a few new gasoline engines that do use direct injection.
The
...
It would be nice to see this technology transferred to aero engines as
it looks like it improves fuel economy and gets more power for the same
size engine. Well, don't hold your breath....unless you jump over to
rec.aviation.homebuilt

The fuel economy improvements are seen at lighter loads. At aircraft
type loads (60+%) and at altitude you can't run lean and/or stratified
so you don't gain much economy.

The improvment in power from the increased volumetric effciency and
charge cooling would still apply.


Geoff.