Took the SkyTrasher out for a spin.

Cpt_Kirk

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Ted Striker
No, not that type of spin.

Went out for an hour to run through some maneuvers and other things with the airplane. It's hard enough to find airworthy 337's. It's even harder to find someone who can instruct in one.

Flew out to the practice area and ran through the various types of stalls, slow flight, steep turns, lazy eights, chandelles, etc. Found some things I thought were peculiar. With the flaps up, power on and off stalls were traditional with a moderate drop of the nose regardless of bank angle. However, any set of stalls with the flaps down resulted in a dramatic nose and wing drop with a roll to the left. It didn't matter the flap setting, power setting, trim setting, aileron position, or coordination. It always dropped and rolled to the left.

Slow flight was pretty standard except for the fact that the airplane didn't seem to want to hold a heading. It would twist to the right about the vertical axis at a rate of roughly one degree per second. The ball was centered the entire time and I maintained roughly 70mph (approx. 61kts). I have a feeling it has to do with the placement of the engines and the airflow over the props at certain AoA. I didn't retest this with the flaps up like I should have. I guess I just overlooked it. I wish there was a program that could show me the aerodynamics regarding a 337 in different phases of flight. I think it'd be awesome to see.

Steep turns, lazy eights, and chandelles were all pretty normal. I also briefly tested the natural stability of the aircraft. It displayed what I believed the be positive static and dynamic traits after a quick pull on the yoke after unaccelerated straight and level flight had been established. So, after that was all done, I flew back to the airport for some takeoff and landings.

The weather was pretty good. Blue skies, few clouds, but the winds were 20 gusting 25+ kts right down the runway. Perfect. Everything was a stop-n-go. By the third landing, I was able to get it down and stopped, reconfigure, and get the wheels up before I crossed the 1,000 foot markers. My landing weight was roughly 3,500 pounds. I don't know about you, but I think those numbers and pretty impressive for that airplane, even with the winds. I wish my camera was charged so I would have some proof to my claims.

The last two landings were short approaches. A small lake on short final and the wind made judging the approach pretty interesting. The first one was a flop. I came up pretty short. The second landing was right on the numbers. The Piper Arrow sure did teach me to judge a steep approach accurately.

Does anyone else like to go out and really get to know their airplane? I'm not there yet and won't be for some time, but I believe I have started. People rely on me, I want to be able to perform when I need to.
 
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Does anyone else like to go out and really get to know their airplane? I'm not there yet and won't be for some time, but I believe I have started. People rely on me, I want to be able to perform when I need to.

I like to do that too. If I ever learn to fly the airplane I have, then I might consider changing to something else. Airplanes can teach us a lot if we just learn to listen :).
 
No, not that type of spin.

With the flaps up, power on and off stalls were traditional with a moderate drop of the nose regardless of bank angle. However, any set of stalls with the flaps down resulted in a dramatic nose and wing drop with a roll to the left. It didn't matter the flap setting, power setting, trim setting, aileron position, or coordination. It always dropped and rolled to the left.

Slow flight was pretty standard except for the fact that the airplane didn't seem to want to hold a heading. It would twist to the right about the vertical axis at a rate of roughly one degree per second. The ball was centered the entire time and I maintained roughly 70mph (approx. 61kts).

Sounds like the flaps might be out of rig, with the left one coming down farther than the right.


Dan
 
Slow flight was pretty standard except for the fact that the airplane didn't seem to want to hold a heading. It would twist to the right about the vertical axis at a rate of roughly one degree per second. The ball was centered the entire time and I maintained roughly 70mph (approx. 61kts).

Wouldn't that be expected at high power settings since the tractor rotates clockwise and the pusher counterclockwise?
 
Great write up. Love those 337's! Would love to own one someday.
 
Great write up. Love those 337's! Would love to own one someday.
Why wait? You can experience it right now. Just put a metal trash can over your head and get your kids to beat on both sides with broom handles.

My first solo and first flying job were in a surplus O-2. At that point I didn't know any better, it wasn't until a few months later when I moved to the 310 I realized what a miserable pos the 337 is.
 
Why wait? You can experience it right now. Just put a metal trash can over your head and get your kids to beat on both sides with broom handles.

My first solo and first flying job were in a surplus O-2. At that point I didn't know any better, it wasn't until a few months later when I moved to the 310 I realized what a miserable pos the 337 is.

I knew about your love of the 337 and was waiting for your reply.

It was everything I had hoped it would be. Now, all I need is for N35 to chime in.
 
Wouldn't that be expected at high power settings since the tractor rotates clockwise and the pusher counterclockwise?

No, they cancel each other out. The only way that rotation should occur is if the rear propeller had become more effective than the front one at that specific AoA, assuming I'm not missing anything.
 
No, they cancel each other out. The only way that rotation should occur is if the rear propeller had become more effective than the front one at that specific AoA, assuming I'm not missing anything.
you're not missing anything. One good thing about that airframe is it's very stable over a wide range of airspeeds. That's why the vietnam era guys praised it as such a good rocket platform. Flying pipeline with it i could put it in about whatever spot i wanted and fly it with my feet while i took notes. What you are describing is not normal.
 
Okay, Holiday weekend I'm done with the yard work and kicked back

I think I'll watch BAT 21 :D
 
The 337 isn't for everyone,I. Think it's a good aircraft,that's fits a mission. Prices are down right now,would love to own one ,can't afford the gas. Now the 336 that's another story.
 
I knew about your love of the 337 and was waiting for your reply.

It was everything I had hoped it would be. Now, all I need is for N35 to chime in.

Well, I posted what I had experienced with a 337, not knowing it had a reputation for being a miserable POS. Aparrantly, my observations got under R&W's skin. I only rib him about them when his obsession with saying "Beechcraft quality is a myth" and "337s are fine planes, the key is maintenance" gets the better of him. I do agree with him though the key is maintenance.....and lots of it.
 
I got the chance to fly a 336 way back in the day, and really enjoyed it. I always thought the 336/337s were cool airplanes, but then again I've never had to care for and feed one either. :)
 
No, not that type of spin.

Went out for an hour to run through some maneuvers and other things with the airplane. It's hard enough to find airworthy 337's. It's even harder to find someone who can instruct in one.

Funny, I was just talking yesterday to some guy in a 337 at my airport who had been doing exactly the same things, complete with the exact same wind conditions and small lake on final...

Good to meet you in person!

And yes, I can confirm that he was off the ground ridiculously fast. I was doing pattern work with a student. On one lap around, he took off behind our touch and go, and was at pattern altitude just about by the end of the 5000 foot runway (as we just turned downwind)!
 
The company i work for has a 337 for the pilots to get around during the busy time of the year. Cheaper to move people in the 337 than our normal working airplanes. We have not had any major mx issues and the aircraft does what we need it to do. Just have to be careful with full fuel. Makes her very heavy. I think its a great airplane overall. Could use a few more horses under the cowl on hot days but haven't flown many aircraft that I didn't think that about from time to time. It is also a great IFR platform. Stable as a rock. I have been on 1300 mile one way single pilot IFR flights in the 337 and never found it to be demanding for the pilot work load.
 
I like to do that too. If I ever learn to fly the airplane I have, then I might consider changing to something else. Airplanes can teach us a lot if we just learn to listen :).
What do you fly now?

Well, I posted what I had experienced with a 337, not knowing it had a reputation for being a miserable POS. Aparrantly, my observations got under R&W's skin. I only rib him about them when his obsession with saying "Beechcraft quality is a myth" and "337s are fine planes, the key is maintenance" gets the better of him. I do agree with him though the key is maintenance.....and lots of it.
Maintenance? What do you mean maintenance? We've been maintenance-free for 14 hours! :D

Funny, I was just talking yesterday to some guy in a 337 at my airport who had been doing exactly the same things, complete with the exact same wind conditions and small lake on final...

Good to meet you in person!

And yes, I can confirm that he was off the ground ridiculously fast. I was doing pattern work with a student. On one lap around, he took off behind our touch and go, and was at pattern altitude just about by the end of the 5000 foot runway (as we just turned downwind)!
I had this gut feeling you'd be on here. Nice to meet you as well. I'm working on a time when we can go up in that 150.
The company i work for has a 337 for the pilots to get around during the busy time of the year. Cheaper to move people in the 337 than our normal working airplanes. We have not had any major mx issues and the aircraft does what we need it to do. Just have to be careful with full fuel. Makes her very heavy. I think its a great airplane overall. Could use a few more horses under the cowl on hot days but haven't flown many aircraft that I didn't think that about from time to time. It is also a great IFR platform. Stable as a rock. I have been on 1300 mile one way single pilot IFR flights in the 337 and never found it to be demanding for the pilot work load.
The airplane is stupid easy to fly. I dont even feel like I'm flying a multi engine airplane. It feels more like a 420 horse single. The fuel isn't too much of an issue. We load it up to 110 gals when we fly and plan for three people plus bags. I'm not sure I agree on needing more power... the Vietnam O-2's had a MTOW of 5300 pounds (something in that area) and did just fine in the hot and humid country. I'm limited to 4,200 MTOW. I wish I could test out its IFR capabilities but right now I'm strictly VFR.. and barely.
 
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Does anyone else like to go out and really get to know their airplane? I'm not there yet and won't be for some time, but I believe I have started. People rely on me, I want to be able to perform when I need to.

Pretty much mandatory if you want to survive bush flying. I don't fly in the bush anymore, but I still like to learn all about the plane I am flying.

Its all about knowing your abilities, the planes capabilities and getting both to work together to get the job done, sometimes at both ends of the envelope on the same flight.
 
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