On Sep 10, 6:28 pm, "Capt. Geoffrey Thorpe" The Sea Hawk at wow way
d0t com wrote:
"Andrew Sarangan" wrote in message

ups.com...





This is a follow-on to the various discussions on the future of GA.

Why aren't the kids who grew up with cell phones and iPods not
interested in aviation?

One key factor is the antiquated airplanes we fly. If we could only
drive a1975 Chevy Nova or something similar, with bolted down wooden
panels and foggy instruments, I doubt many teenagers would be earger
to get their drivers license.

The second aspect is the fascination pilots seem to have with war
equipment, and the yearning for the 'good ol days'. Many pilots look
at a WW2 airplane like a B17 as if it were a technological marvel.
That may be true, but it just doesn't connect with the new generation.
Even though I am not from the iPod generation, I too found this
fascination with war equipment rather strange. Perhaps it is because
no one in my anscestry participated in the war.

How many kids do you see hanging around at antique car shows? Airports
are not too far from being an antique museum.

Aviation technology has marched on in great strides in the past 50
years. But almost all of the modernization has occured due to the
advancement in electronics. This is the only aspect that keeps some of
us still interested in aviation. That includes VOR, GPS, satellite
weather, flight planning tools, electronic charts, glass panels etc..
The mechanical aspects have been stagnant. All these modern
electronics are still housed in ancient aluminum panels that are
riveted togother. They creak and vibrate, and the engines consume
leaded fuel and puff out smoke and oil, and have frightening gas
mileage.

In order to appeal to the next generation, this is what I think we
need:
- a small turbine engine suitable for GA aircraft with fewer moving
parts and smoother operation
- gas mileage comparable to an SUV
- a fully composite airframe
- molded aesthetic interiors
- cost about 2-3x the price of a luxury car

The list is very ambitious, but we are on the right path with LSA.
What is still seriously lacking is the powerplant.
I would really like to see is a small turbine engine. I don't mean
salvaged APUs. It has to be something that is designed from the bottom
up as a GA powerplant.

Any comments?

"Small Turbine" and "Gas mileage" - you only get one - the thermodynamics
just don't support both without real exotic materials.

Other than that, though...

--

I have heard that argument many times, but I have never seen that
thermodynamic argument presented. I just borrowed the book on Aircraft
Gas Turbine Engines from the library and plan to read it to find out
what the real story is. My suspicion is that the limitation is in the
materials, not thermodynamics. It may take a significant investment,
but if the military is also interested in similar things it won't be
that hard to find the R&D suppport. I've heard that small turbines are
of interest to the Air Force for potential use in UAVs. A UAV and a
small GA airplane are not that far apart. In fact, the predator is
using the Rotax 914 engine which is a very popular GA engine. A small
turbine may sound far fetched now, but I am sure GPS also sounded far
fetched 20 years ago, but became commonplace after heavy military
investment.

Having said that, I know of at least two companies working on small
turbines. One is Innodyn, and the other one is M-dot. The latter one I
believe has some DoD contracts to be build turbines for UAVs. I doubt
these companies would even exist if the basic physics is flawed.