Subject: Cub tail dragger time
From: Rotary Engine
Date: 8/11/2011, 10:55 AM
To: AAA Put this in the To box


This is the first time I have flown one of these
since I was fourteen or fifteen. I forgot how bad it
was.

Horrible handling airplane. Terribly un coordinated.

Don't learn in it unless you can afford to spend twice as much time
and money. The flying skills you learn are then useless for flying any
other
type of modern aircraft.

However it is fun and challenging :)

Paul Lamar
--



Flying something like a Cub or Champ will make the automatic parts of your
brain ready to work without you thinking about it. You call it bad, but
it's actually perfect for flight training. If you can make the Cub do your
bidding, the only problem you'll have with the RV is getting used to its
small and light control inputs. Some people might over-control in the first
few moments of transition. Hopefully you will get you a bit of stick time
in another RV before having to do it solo.


Matt-

The reason it is bad is nobody designs an airplane today with out due
diligence to coordination and aero balance of the controls. There is no
upside to uncoordinated and unbalanced controls. It is like an old unstable
car. Yes you can learn to drive it but why do that if it can be made
stable. Therefor I disagree with the idea it is perfect for flight
training.


Get lessons in a C172. After you have your license get checked
out in a Cub if you feel the need to find out what it was like to fly in
the
1930's. Build a replica of the Wright Flyer if you really want to learn to
fly a bad airplane. Yes it was the first barely controllable airplane but
technology improves.


The other Cub drawback is the early versions did not
have flaps so the flare is very nose high which totally obscures the runway
ahead. In fact Piper lost a huge law suite about 30 years ago because of
this factor. As I recall it bankrupted them. This had a very negative
effect on the light plane industry. Cessna stopped building and selling
piston powered aircraft. Congress had to enact a law prohibiting liability
suites for products 17 years or older.


Paul Lamar



Hi Paul, I think the big suit at that time was against Cessna for
failing seat latches that would leave the pilot in the back seat hanging
on to the yoke after lift off. I did not see any comments on my "Bass
Akwards" article. With such a knowledgeable group, I was expecting
something. http://www.eaa.org/experimenter/articles/2010-11_bass.asp
There is a link to a side splitting segment from Top Gear.
-- Murry

That was another one.
I had to modify my 182 for that one.

Paul Lamar

"The trike arrangement with the single front wheel leads to terminal
oversteer, a spinout, when pushed to the limit."

Not necessarily true. Under steer over steer has nothing to do with where
the wheels are and how many. I don't think he knows what he is talking
about using these terms in this context. Slip angles vary with load
and tire construction. The coefficient of friction of a tire also varies
with load. Higher load lower coefficient of friction. Therefor side
force generated can vary widely. The major effect is the CG being behind
the center of side force. If what he says is true fully locking tails
wheels would
be more popular. Has anybody on here flown a fully locking tail wheel?

Paul Lamar


  Less than 40mph stall speed and you need flaps ? Virg

 Have you ever hit a pickup truck on the runway at 40 MPH? :)

 The flaps keep the nose down at slow speeds so one can see.

 Paul Lamar

 Awful lot of technology going on about landing a plane.  Just fly it
 down and land it.  Ask RV4 pilots who fly a lot if you should make
 wheel landing or 3 pt and do it.  I can't even imagine not doing
 wheel landing in cross wind, but haven't flown low wing tail
 dragger.  Also, you can see ahead with wheel landing just like if
 flying trike gear.  You touch down with nose as low or lower (since
 no nose gear to hit first) than in trike gear.  You keep pushing on
 stick to keep nose down until tail finally falls on its own because
 to slow to fly. Still have rudder control for few seconds.  Then
 slows down and you lose that. Now you better have brakes that won't
 get hot and fail because the brakes are what you steer with.  Forget
 the tail wheel except for taxi (unless RVs are way better than other
 taildraggers).  If strong xwind and brakes fail you're going off the
 runway.  Just hope you're slow enough by then that you don't hit a
 wing tip when you have to ground loop it to keep from hitting something.

 But, you have good brakes.  So, you will always be able to
 steer.  These RV tail draggers can't be hard to land or there
 wouldn't be so many.  You will be fine.  Forget the cub and get dual
 time with RV taildragger pilot or low wing warbird taildragger
 pilot.  They can show you best way to land it.  But, I can't stress
 enough to learn wheel landings.  Then you can land anywhere any time
 you need to.

 Van

 True wheel landings are the answer but that negates the whole idea
 of a tail dragger in the first place. You cannot make a full stall
 low speed wheel landing. That is the wing angle of attack is not
 high enough. That also implies a longer runway is needed. Tail
 wheels are supposed to be
 better in rough, soft field, full stall landings off airport at the
 lowest possible speed.

 Yes you may have slightly less drag with a tail wheel.

 The main problem is you can't see enough to keep it straight in a
 full stall landing. One can learn to keep it straight if one had an
 out side point of reference. The RV's are better as they have flaps
 and are flown from the front seat.

 The jpg illustrates a solution. It could also be done with a remote
 video camera and monitor in the cockpit.

 With all the slop in the tail wheel cable a Cub takes some learning just
 to zig zag down the taxi way smoothly. I can't see out of the RV4
 when taxing either but taking the slop out of the tail wheel cables
 makes it much easier to zig zag so obstructions ahead can be seen.

 Paul Lamar


 Back in the 1960s, Vietnam era, the Air Force toyed with the idea of
 resurrecting the P-51 with a turboprop engine as a ground support
 plane.  I believe some flying examples were built but the AF shelved
 the idea because they didn't think they could retrain enough pilots
 to fly a tail dragger ... and the P-51 did have a lockable tail
 wheel. Locking it was on the pre takeoff checklist lest the torque
 of the engine would steer you right off the runway on takeoff.

 And shopping carts do make good trainers .... just put a case of beer
 in one and have the trainee run it around the market backwards for
 half an hour.  Then they understand.

 PS, I learned to fly in a military flying club at Ft Gordon, GA.  All
 we had was PA-!2 and PA-18 Cubs and a Cessna 140 and a 195 with the
 Goodyear castering main gear.  I never flew a nose dragger in my
 first 100 hours.

 SD



 The purpose of tail wheel is so you can land on rougher field without
 breaking off the nose gear.  If you have the runway do a wheel landing
 unless for some strange reason an RV lands better in a xwind in 3pt than
 wheel landing.  In wheel landing you can put that wing down and land on one
 wheel just like trike gear to keep from drifting across the runway. The
 problems don't start to arise until tail gets low.  If you try to 3pt in
 cross wind, its a real bad feeling when you start drifting across the runway
 and your nose is stuck in the air and you have very little directional
 control because going too slow.

 Van

Yeah..  The thing that happens in three-point is you run out of
aileron..  That's because you get slow, start drifting because you
don't have enough bank angle because diminishing airspeed is
diminishing aileron authority, so you add power to give yourself time
to straighten it out, adding power gives you plenty of rudder
authority, but you still can't get rid of the drift because the
aileron is being overridden by the dihedral effect (roll-yaw
coupling).  If you have runway length, convert to a wheel landing..
Or go to a different airport (or taxiway).

As an aside, I've landed tricycle gear airplanes a number of times
when I really didn't have enough control authority to cancel out all
of the drift.  Once in my 182 landing at Reno.  Putting everybody onto
16 when the winds were 280@24 G 28.  I did a no-flap landing, and
still had to angle it up across the runway to keep from crabbing on
touchdown.  No problem with 150' wide runway.  I would have refused
the tower if I had been in a C180 - made them let me land on 34..  And
again in a Beech Sierra.  Same kinda thing - 90 degree cross, with
winds 24-32.  And, my Varieze is to be landed in a crab (or with a
kick) instead of wing-low - because it's easy to drag a wing tip, and
you run out of aileron as speed diminishes.

It can actually be more of a challenge to taxi than to land with that
much crosswind..  You overheat brakes, or just flat can't get the
airplane to go in the right direction.  I remember seeing a C170 get
boxed into a corner between some other parked airplanes because the
pilot couldn't taxi away from the wind.  Was feverishly holding the
yoke to his chest, but didn't realize wind was blowing reverse under
his elevator, unloading the tailwheel, allowing it to skid sideways..
If he had pushed the yoke to neutral, I'm pretty sure he would have
been fine.


Matt-

Cam have some real funny stories taxiing tail drsggers. I was flying somewhere in 180 and based up in Rapid City.  Wind blowing hard right down runway when got ready to leave.  Only problem was getting to it.  Had to taxi with direct cross wind to get to runway.  I could hold it for a bit and the brake would heat and let go and it would start to nose into wind so I'd give it a bunch of power and spin completely around to head in right direction again for a little ways and then spin around again.  After about 4 spins and gaining maybe 80 yards, the tower called, "Five Zero Alpha, do you need any assistance?"  I said, "If you have any assistants up there send them down".  They laughed and called the fbo guys to come out and hold my tail straight and walk me rest of way to run way.

I sure missed my Bonanza about then.

Van

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