Paul,

Do you have details on autogiro's running rotaries ? Pardon
my
thoughts, but I think a rotary would work well.


Thanks,

Barron

I don't have any dwgs but Gary Buster might help you out.

http://www.youtube.com/watch?v=QOwb8QRHrMY

Paul Lamar



Back in the days of the late Cierva and before the Advent of
the
helicopter the autogyro was quite a capable machine. It had
heavy two
or more bladed rotor systems which stored a great amount of
energy.
Todays autogyros on the other hand in my opinion as a rated
Chpl with
IFR must be the daftest thing out there. Flimsy contraptions
with
energyretention on the scale of a chopstick. You would not
find my
behind in One of them on a calm, stable day let alone in any
kind of
turbulence. Surprises me they are legal.

Lutz Strobel

Have you looked at the you tube video?
http://www.youtube.com/watch?v=QOwb8QRHrMY

I filmed the video. Looked pretty good to me. However it was
a calm
day.

IMHO the main problem is MPG.

Paul Lamar

Actually the main problem is negative G's When that happens
the disk
is no longer loaded and looses momentum, which is where the
lack of
stored energy due to the low mass of the rotor system comes
in....
the second severe problem is the underslung rotorsystem most
of the
nowadays ( refuse to callem modern ) autogyros employ. It
can kill
You fast. In summary stay away from them, even if a crash of
one of
them would have nothing to do with being powered by a Rotary
engine,
it would still rub off. - Lutz Strobel


We are not doing outside loops here :)

There are a lot of them in the States. If the accident rate
were much
higher than other experimental aircraft the FAA would be all
over
their case.

Paul Lamar


A lot of people think a gyro works by weight shift, it does
not, the
teetering rotor and gimbal head allow the rotor to in effect
change
pitch around the circle as the advancing blade would have
more lift
than the retreating blade if it did not teeter They are not
as simple
as they look.

John Evans



Lutz you should try them although I think no one could
pursuance you
to do so now.  They are fun and safe, and handle
turbulence very
well.   If fact you do not feel any at all
even in very high wind.
The "rigidity" which is the percent of lifting surface in
the whole
disc is very small, compared with that of a plane which is
100%, so
turbulence is no issue for a gyro.

Gordon Gao

Thanks for the warning Lutz, but I think if flown properly
the gyro's
are as safe as the next aircraft.  Many people see the
"open cockpit"
and can't imagine flying them.  This is because people
don’t
understand them, and this is understandable as they are not
as common
as their fixed wind counter parts.


Thanks,

Barron

There are 100's flying in the states and I'll bet the
accident rate is
no higher
than hang gliding. People don't fly them in thunderstorms
and they don't
use
them for getting from one place to another. Strictly
recreational.

You would not fly your hang glider in a thunderstorm would
you?

Just put a tach on the rotor disc and an alarm :)

How people choose to kill them selves is nobodies biz but
their own.
When is the last time a gyro crashed and killed some one on
the ground?

Government, get  out of my life and I don't want to pay
them to do it.

Paul Lamar



     Hi!: by entering SAE.org  the
store, and/or entering the search
word 'autogyro' in the box at top right side of page,
    you can find some technical papers about this
flying machines, some
from its inventor: Juan de la Cierva, and others
    from people in the USA companies that
produced autogyros, and other
engineers specializing in Aeronautics.
     Is $24 downloading each paper, no
need to be a member, and for the
articles that exist in SAE paper version as well
      as an article in SAE Journal, the cost
of downloading a full back
issue is $14.
     By digging in the Table of Contents
of each issue, most are
available while others don't, you may find good
    reports on many issues connected to engines
and aircraft; as no
major progress was done since WWII in the field
   of reciprocating engine and propeller
speed range aerodynamics, many
old articles still have a value, and the goal is
    not outperforming of making out of date the
NASA work.

      Thanks for your attention, have a good
week. Best regards. Salut †


     Jose Gros-Aymerich

        Madrid, Spain

The two biggest Autogyro problems are 1. They have a lot more drag per lift than a fixed wing. 2.When you reduce the angle of attack of the rotor disk too fast, the top drag reduces pitching the nose down and can result in tumbling forward! Not survivable.

Dave James

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