New 140 pilot Landings

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rfrederick
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New 140 pilot Landings

Post by rfrederick »

Hi All,
I am a few months in my 140 flying and now feel comfortable with 3-point landings. However I regularly feel like the tailwheel is touching first (so it might be a 1-point :) ).

Runway is paved. I approach between 65-70mph, full flaps, power completely pulled back. VSI typically shows 600-800fpm. 600-6 mains and a scott tailwheel; not sure what model.

I think my next step might be to try landing with a little power but thought I would ask for help from folks who have worked these bugs out before.
Rick
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Re: New 140 pilot Landings

Post by 6643 »

What is your CG? Is the elevator correctly rigged? If it's a pneumatic Scott tailwheel and your CG is near the aft limit, a full stall landing will be tailwheel first. Adding power might make it worse by pushing the elevator down farther.
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Re: New 140 pilot Landings

Post by rfrederick »

Hi John,
I recall when I initially did the calculation, C.G. was around +15.7 with 2 occupants.
I also calculated with just me as pilot but don't recall it changing much. going from memory this was right around the middle of the range.

The 140 does have a pneumatic Scott tailwheel.

As for the elevator rigging, it seems normal compared to the other aircraft I have driven but if it were incorrectly rigged, what behavior would I expect?
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Re: New 140 pilot Landings

Post by 6643 »

You might not notice anything, but if you have extra up elevator you could conceivably get the nose higher during your flare.
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Re: New 140 pilot Landings

Post by 6898 »

That larger dia. Scott pneumatic wheel and maybe springs being re arched by someone could be why? Or maybe back too far on the yoke just before it quits flying? Just for fun some gliders only do one wheel landings are you categorized as glider? LOL
Jeff T 1948 C-140 NC3600V
Past President 120 140 Assoc. 2019-2023
rfrederick
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Re: New 140 pilot Landings

Post by rfrederick »

John,
if, you are available sometime, I may have to have to ask you to take a look at the rigging, I think you are just across the lake from me.

Maybe, as Jeff mentioned, check out the tailwheel and spring as well. Otherwise I will be looking for a glider endorsement :lol:
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Re: New 140 pilot Landings

Post by 6643 »

rfrederick wrote: Wed Jul 08, 2020 8:48 am I think you are just across the lake from me.
Just drove by there Sunday!
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Re: New 140 pilot Landings

Post by 8342 »

On the leaf spring question there is a Neal Wright Technical article in these Forums (see attachment) that is eye opening about the wrong leaf spring sets that are on our airplanes. Of the several that they looked at none were correct. It also goes on to explain why certain bolts are installed contrary to standard practices.

I have found the wrong set on my airplane and I am now in the process of finding the correct set.

The main thing is to look at the Serial number of your airplane and look in the Illustrated Parts Catalog to see which set yours should have.
Actually the Neal Wright article spells it out very well.

Somewhere in the article it mentions the fact that the correct set may help the quality of your landings.
But then again it may be just operator error. :D

Good Luck,

Rick
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tailwheel_oct__05_scott_320.pdf
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Re: New 140 pilot Landings

Post by 6298 »

Full stall landing with my 120 and 140's puts the tailwheel on the ground first. The one with the Scott 3200 touches the tailwheel earlier in the landing.
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
Overhaul small Continentals
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Re: New 140 pilot Landings

Post by rfrederick »

Happy to hear Randy.

I still plan to have John take a look at the rigging in the coming weeks.

Thanks for the tailwheel document Rick. I didn't see anything on my tailwheel setup that seemed incorrect compared to the description.
I believe I have a 3200.
140TW_2.jpg
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140TW_1.jpg
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Rick
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