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hrrcflyer 01-11-2007 12:58 PM

Midwest Extra 300 Questions
 
1 Attachment(s)
Hello everyone,

Does anyone have one of the older kit built 80" wingspan Midwest Extra 300's. Does your wing have flaps? I recently acquired one with flaps and a 3W60 gasoline engine from a fellow club member who is trying to sell it for a friend and I am looking for the following information:

GC Location
Control surface deflections for all surfaces
Recommended servo torque values
Recommended engine range.

I am not into 3D at this time, but I would like to install servos capable of doing 3D. Any help will be greatly Appreciated. I have posted some pictures.

Thanks everyone

Fly safe and have fun!!!:D:D
David

KidVermin 01-11-2007 05:16 PM

RE: Midwest Extra 300 Questions
 
The flaps on your's was an unnecessary mod. The plane will land slow and stable without them. Mine is now traded off, but the first time I traded for it, it had a heavy 50cc conversion. More than enough power to be flown as a normal plane but flew heavy, yet stable. The best non coupling knife edge until my 70 Katana. The next owner flew it with a ST 2300. My second time with it, I put on a ST 3000. This time it was so agile with little loss on power. The 3W will make it a missle and it's not that much of a 3D machine with the small control surfaces.
I don't recall the cg location. You need to do a search on here for all the replies in the past 3 or 4 years.
1/2" low on ailerons and 3/4" high
elevator 1" low, 1 1/2" high
rudder - all you can get.

Don M. 01-11-2007 09:58 PM

RE: Midwest Extra 300 Questions
 
If yours has flaps I wouldn't try them. I had one of these and you needed power right to the ground. Mine was overweight (17 lbs.) and underpowered ( Brison 2.4 ). It was one of the worst flying planes I ever had. I got so disgusted I threw it out in the trash one day. Other people love them.

Newc 01-12-2007 07:37 AM

RE: Midwest Extra 300 Questions
 
1 Attachment(s)
Built mine 6 years ago (Wow, was surprised to see how long ago when I just looked at the flight log!) and have been very happy with it. Here's the info on mine that I'm still flying....CG - 5 7/8" from LE at the fuselage (per Midwest plans); engine - 2.1 Moki; Prop - APC 20x 10 or 20x 8 (like the 20x8 best); Control throws; Elevator - 1/2" low, 1 1/16 high (40% Expo); Ailerons - 9/16" low, 7/8" high (40% Expo); Rudder - Full; Total, finished dry weight = 15# 4 oz.

Unlike Don M.'s (perhaps due to his weight situation) mine lands like a trainer (actually flies like one too except when you want it to do otherwise), floating down. Power definitely not needed or wanted on landing. Need to chop throttle back early to get it to slow enough for landing. This is one benefit of the lower pitch prop.

By the way, flies well off land or water!

Don M. 01-12-2007 09:13 AM

RE: Midwest Extra 300 Questions
 
One of the main reasons mine turned out so heavy was because I needed 24 ozs. of lead in the nose to balance it. I never could understand it with a 4 lb. gas engine in the nose.

Newc 01-12-2007 02:35 PM

RE: Midwest Extra 300 Questions
 
Interesting, Don. The Moki weighs less than three pounds and I didn't need to add any weight, and I have the elevator servos at the rear. In some way the tail of your plane must have been built heavy.

Don M. 01-12-2007 02:58 PM

RE: Midwest Extra 300 Questions
 
Now that I think of it I covered mine with Coverite 21st Century painted fabric ( I have no idea why ) and since most of the covering was aft of the CG maybe that's why. It's landfill material now.

hrrcflyer 01-15-2007 07:45 AM

RE: Midwest Extra 300 Questions
 
Thanks everyone for your input. Does anyone have the recommended servo torque for the plane. I haven't had a chance to actually weigh mine but it seams a little heavy as well.

Hey Newc,
Awesome pictures of your Extra. I live near the water but I would have never thought to put floats on an Extra. To be honest, I don't think I would have the nerve to fly it off the water either.

Fly safe and have fun!!!:D:D
David

Newc 01-15-2007 09:00 PM

RE: Midwest Extra 300 Questions
 
1 Attachment(s)
I use Hitec 615MG servos on elevator, rudder and ailerons and Hitec 300 on throttle. All are on a twin 1500 mAh 5-cell (6v) battery setup.

Can guarantee that the Extra on floats draws a crowd whenever it's flown! We always takefoff with a clear lake in front of us and within a few minutes it seems that everyone in the county on a pontoon boat has stopped - normally in the landing pattern - as well as all the jetskis. Have had skiers drop off so that the tow boat would come back and they could all watch. When we fly our Northstars we get a similar reaction (also should have seen the reaction of an ultralight pilot who was rounding the point at treetop level when one of our Northstars was at the same altitude and almost the same spot!) and have fun showing the hot-shoe jetski riders that they really aren't very fast! Can hardly wait until the 104" WS PBN Nomad as shown is flown this spring!

hrrcflyer 01-16-2007 12:44 PM

RE: Midwest Extra 300 Questions
 
Hey Newc,

What aer the torque values for the Hitec 615MG's? I'm a Futaba man myself so I am not familiar with the Hitec's. Currently the plane has FUtaba 9202's on the elevators which are metal gear with a coreless motor rated for +/- 90oz of torque, The runner servo is rated for +/- 150oz of torque and the ailerons and flap servo's are all rated for 115 oz of torque. The on;y servo I at all concerned about is the rudder servo, but the plane has been flying with it so I am probably going to leave it in for the time being.

By the way, your PBN Nomad looks AWESOME, You've got to let me know how it flies.

Fly safe and have fun!!!:D:D
David

Newc 01-16-2007 03:51 PM

RE: Midwest Extra 300 Questions
 
I don't recall the torque of the Hitecs now and can't find any current reference information from Hitec. Was able to find the following link that shows them to be 132 oz-in at 6v - http://webpages.charter.net/rcfu/Hel...ervoChart.html You ought to be able to know if the rudder servo is enough by the way the plane holds a knife edge. Mine does so with very little rudder input.

Thanks for the compliment on the Nomad.


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