Official Freewing Twin 70mm AL37 Airliner Thread

[Desolation Angels]

A pro pilot friend of mine is thinking of getting this aircraft so I let him take the big Delta Max up for a spin, he's not afraid to fly in the weeds
It really is a lot of fun to watch him fly!

https://youtu.be/KK0hsb45boA

[MeyerVW]

I do have a Aura8 and my receivers are spektrum AR8020t. I will go look online and see what they can do.

[xviper]

I use a HobbyEagle in my AL37 and I use a Spektrum Safe Select in my PJ50. What these planes need is what the real 737 uses - a yaw damper. Yaw is dictated by the rudder, so you want high gain on the rudder. The HE gets about 50% on the rudder and the AS3X gets about 60 as its number represent different units. As long as you're putting a gyro on these planes, you may as well take advantage and dial in some gain on the AIL and ELE channels as well - HE, 35% AIL and 35 - 40% ELE. Adjust to suit your flying style.
The E52 is not that dissimilar from the HE.

[MeyerVW]

Has anyone put the E52 gyro in the Al37? I am ready to tame the tail. What percentages and what surface are you using to stop the tail wag? Also thinking about this for my PJ50.

[themudduck]

Painted…actually a slight cream color. Home Depot mix shown below:

-GG

This same paint shade is also a dead-on match for the FW F14 (bottom side), the Avios Mig17, and the FW T45.

[GliderGuy]

If I buy the plain white one, does it come literally painted white, or is it bare foam? Looking to put American Airlines livery on this plane.

Painted…actually a slight cream color. Home Depot mix shown below:

-GG

[Syntha]

If I buy the plain white one, does it come literally painted white, or is it bare foam? Looking to put American Airlines livery on this plane.

[Jetman64]

Where are you putting your receiver, and which way is the battery lead facing? These 2 things can help a lot with the CG.

[GliderGuy]

I fly with an Admiral 6000 and it sits with part of it off the back part of the tray. I still carry about 3 mm of up elevator trim.

Move your battery farther back and/or add weight under the tail. Balance it on the factory CG mark. You have some work to do.

-GG

[V12Kid]

I flew mine this past weekend and have a 5000mah battery all the way back on the battery plate. Even with this the airplane wants to dip the nose while flying and seems nose heavy? I had to give it tons of trim which only gave some relief.

Any ideas what could be missing on my end to get it fly flat and straight?

[Capt. G]

Next mod , operational cargo door. Stay tuned

[xviper]

Never heard of the K C 37, only KC-46

"KC37" is a take off on AL37 and 737. Just as Freewing could not call this plane a Boeing 737 and ended up calling it an AL37, he called it a "KC37". "A rose by any other name .................................... "
If you really want to get down the nitty grittty of it all, the KC-46 was NOT built on a 737 anyway. It was built on a Boeing 767. So any way you want to look at it, a mid-air refueling tanker made from a foamie model of a Boeing 737 can be calle a KC-"anything you want to call it". Everyone knew what it was supposed to be. You don't have to "hear of it" because it doesn't exist, just like a KC-46 made from a 737 doesn't exist. It was a fun and dramatic mod for the purpose of enriching this hobby.

[Elbee]

KC-46 , operational refueling boom. Believe I made the first

CG, Welcome to Hobby Squawk, Sir. Glad to have you onboard. Outstanding work on your operational boom. I have had the privilege of sitting in the refueler's "lounge" and watching several ANG F-16s being fed. Big Fun indeed. Your mods are inspiring and your repaint looks perfect from here. . Please post pics whenever you are able. Best, LB

[Capt. G]

[Capt. G]

Never heard of the K C 37, only KC-46

[xviper]

KC-46 , operational refueling boom. Believe I made the first

Well, maybe the second?

https://www.hobbysquawk.com/forum/rc-airplanes/rc-civil-commercial-jets/215182-official-freewing-twin-70mm-al37-airliner-thread/page30#post222028

https://www.hobbysquawk.com/forum/rc-airplanes/rc-civil-commercial-jets/215182-official-freewing-twin-70mm-al37-airliner-thread/page30#post222227

[Capt. G]

KC-46 , operational refueling boom. Believe I made the first

[xviper]

Desolation Angels I did my first flew flights without a gyro and it's a very nice, docile flyer. The waggle just looked weird. It also had a bit of a wing rock in a cross wind. Then a flying buddy who's a real 737 pilot told me I should put in a "yaw damper" like the real ones he flew. Did that and it cured it. I also cut the lower winglets at the same time and that seemed to solidify the wing rock, but can't really say if that was due to using some gain on the AIL gyro axis. In any case, my AL-37 is a very solid flying airplane now.

[Desolation Angels]

Hey Viper, I've considered adding a gyro and just using the rudder channel as a yaw damper after seeing vids showing the tail waggle.
Let's how it handles this weekend, I have to get this thing in the air.
She's ready to go!

[xviper]

Thanks for the input fellas!
Going to try and maiden my Delta version I've had built since Dec 2020- thread here:
Official Freewing Twin 70mm AL37 Airliner Thread - Hobby Squawk RC Forum for Airplanes, Boats, Cars, Helicopters, Tanks, and Trucks
Supposed to be very windy tomorrow but we'll see, might be Sunday but I'm going for it!

Don't be too shocked by the tail waggle during certain parts of the flight. They aren't dangerous, just odd looking. A simple gyro will act as a "yaw damper", just like on the real 737.