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

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