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Balanceing the Yellow Aircraft P-47

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Old 02-15-2010, 06:09 PM
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WarbirdFlyer404
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Default Balanceing the Yellow Aircraft P-47

I'm wondering what would be the best ,having the gear extended and being perfectly balanced or gear up and balanced.I'm thinking if I go with gear up and balanced when I put the wheels down I will be to nose heavy.Any suggestions?
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Old 02-15-2010, 07:47 PM
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All Day Dan
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Default RE: Balanceing the Yellow Aircraft P-47

I always balance my models with the landing gear down. That's the landing configuration when the model's sensitivity to the CG position is the most delicate. What does Yellow Aircraft recommend? Dan.
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Old 02-15-2010, 08:19 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Dan I bought the model used and have no manual to go by. I have checked there website and it gives the CG but no other info. I believe gear down is the way to go .
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Old 02-15-2010, 10:25 PM
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Greg Wright
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Default RE: Balanceing the Yellow Aircraft P-47

warbirdflyer, i have built and flown a number of the yellow aircraft p-47's, the last one i had i balanced it with the gear up and it made a whole lot of difference than when i balanced the others with the gear down. The manual says to balance it with the gear up which meant that i used alittle more weight to balance it, which actually took out the tendency of the plane ballooning with the deployment of the flaps for landing.
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Old 02-16-2010, 08:42 AM
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Default RE: Balanceing the Yellow Aircraft P-47

Greg at this time I have the plane balanced at 10 degress nose down with the gear extended. When the gear comes up the plane goes to being level balanced. This should be manageable, how much flaps do you use?
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Old 02-16-2010, 09:15 AM
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Greg Wright
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Default RE: Balanceing the Yellow Aircraft P-47

wbf404, typically i use about 15deg, for takeoff and 45deg, for landing. The plane is a very docile airplane to fly.For a warbird, it is one of the most predictable airplanes i've owned. I also own this p-38 from yellow that is one bad rama jama airplane.
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Old 02-16-2010, 09:21 AM
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Default RE: Balanceing the Yellow Aircraft P-47

WBF404, I see you live in texas, one of my good friends lives down in brownsville, he is a JR Rep & also he is a yellowaircraft dealer if you need any help with your plane he can give it to you. His name is Gary Dye.
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Old 02-16-2010, 10:05 AM
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Default RE: Balanceing the Yellow Aircraft P-47

Greg so do you think the way I'm set up I would have a sucesseful maiden flight? I'm waiting on a nice warmer day to take her out and give her a go.
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Old 02-16-2010, 10:29 AM
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Default RE: Balanceing the Yellow Aircraft P-47

it's going to fly fine but it will be a little sensitve on elevator and not keep a good line. the p-47 actually retracts the wheel past the c.g. as we all know so definetely balance with the wheels up. The extra nose weight is going to help bring it in on landings, 47's like to float. In my experience a slightly nose heavy 47 will fly like its tail heavy, a real nose heavy 47 flies like it's supposed to.
Yellows are awesome little birds, by far the best bang for your buck warbird out there. If you need weight but dont want add any get the chin scoop from Aerotech, it will be the perfect amount of weight that you need and looks really cool.
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Old 02-16-2010, 11:19 AM
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Greg Wright
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Default RE: Balanceing the Yellow Aircraft P-47

WBF404, yes you should have a very successful maiden flight with it set up that way. If you don't have a manual what are your throws set at. The manual calls for these just to help you, elevator is 3/8" up & down, ailerons are 5/8" up & down and rudder is atleast 2" each way just to give you the basic set-up. I have always set them to these and they have all flown great. GOOD LUCK on your maiden flight.


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Old 02-16-2010, 11:51 AM
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Default RE: Balanceing the Yellow Aircraft P-47

Greg and Jeff I really apreciate all the info on the balancing. The previous owner who had this aircraft never flew it and had it in storage for 5 years. The original builder had flown it 10 times at the least and I chatted with him and he commented it was a superb flyer at 1/3 rd throttle. I have a sheet with the control throws and realy apreciate you rounding them up for me Greg. You definitly have some Beautiful warbirds in your arsenal.
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Old 02-16-2010, 12:00 PM
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Greg Wright
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Default RE: Balanceing the Yellow Aircraft P-47

WBF404,
Glad i could help & thanks for the compliment, i will be going to the AMA Nats with this bird this year to compete in team scale. I hope it all goes well for me. It will be my first time competeing. Show us some pics of your plane.
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Old 02-16-2010, 12:41 PM
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Default RE: Balanceing the Yellow Aircraft P-47

I will post some pics of my P-47 later this evening off the home computer.
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Old 02-16-2010, 05:15 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Here are some pictures I took of the P-47 at the local airfield.This was before I had went through and freshened everything up.
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Old 02-16-2010, 05:57 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Yes gentelmen I can't wait for this Texas weather to break. It's been realy cold and wet here and I'll be darned if this past week we got 15 inches of snow. Now it's realy wet at our airstrip and I'll be lucky to fly this weekend. I used the dual batteries to balance the plane without adding any other weight.I located them by fabricating 2 trays in the tail end of the fuse. The P-47 comes right in at 26 pounds dry.
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Old 02-16-2010, 06:09 PM
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Default RE: Balanceing the Yellow Aircraft P-47

WBF404, looks good. I saw that plane for sale here on rcu and you had just beat me to it so GOOD LUCK and have fun with it.
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Old 02-16-2010, 06:18 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Thank you Greg, when I noticed the plane on the RCU site I just had to have it. I had been waiting for the new Top Flite 47 to come out but when I seen this one and it was local I imeadiatly called the guy and went to get it. Good luck with the competiton you will be in and hope all gies well for you aswell.
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Old 03-07-2011, 11:38 AM
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Default RE: Balanceing the Yellow Aircraft P-47

Can one of you guys tell me the suggested CG location (distance back from LE)? Looks like the advice is to balance her slightly nose down with gear down, which will give me level with gear up.

Thanks,

Joe
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Old 03-07-2011, 12:48 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Hi,

Let me see if I can dig out an old manual for the CG, but you should balance her with the gear up. That's the configuration in flight, and as mentioned here, the gear retract aft so you'll have a little bit of nose-ward CG when the gear are deployed. This is the best scenario.
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Old 03-07-2011, 06:16 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Just getting into the finishing stages of my YA P-47. My manual says "5.25" behind the leading edge of wing at root". I have one of the newer kits with weighted ailerons.

Hope this helps.

Regards,

John
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Old 03-07-2011, 06:24 PM
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Default RE: Balanceing the Yellow Aircraft P-47

Here's what I did. I knew the plane was going to need nose weight, as most round-cowled warbirds do. I put a G62 in mine with scale exhaust. I kept all servos, battery, and receiver directly in the center section of the wing saddle. Here's the funny part. I never balanced it. The day I maidened it, I ranged checked it and took it off. It flew great. I never had to move any weight around.

The only way this plane would fly badly is if it was tail-heavy, which I think would be really hard to do. About the only way this plane would come out tail heavy is if you put all of your servos and radio equipment in the rear portion of the wing saddle, or by putting the servos in the tail. Even with todays light weight 40cc engines, as long as you keep all of the weight forward, you can't go wrong.
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Old 03-08-2011, 06:51 AM
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Default RE: Balanceing the Yellow Aircraft P-47

Thanks all for the help.

I ordered some accessories from Yellow Aircraft on the phone this AM and they told me the following in reference to control throws, etc;

Elev 5/8" up and down
Ailer 3/8" up and down
Rudder 2" left and right
Flaps 45 degrees
CG 5 1/4" from LE at root gear up

Joe
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Old 03-21-2011, 05:40 PM
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Default RE: Balanceing the Yellow Aircraft P-47

I dont know if it makes any differance or not but I believe that is a Burt Baker plane not a Yellow . A friend of mine built that one . It should have robart retracts . Just letting you know incase there might be a differance in the balance .
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Old 03-25-2011, 11:57 AM
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Default RE: Balanceing the Yellow Aircraft P-47

I have built flown and sold 3 Yellow P47!

Great flying bird. However, the corrected CG is 5" from the leading edge with the gear up! I found a tendency to balloon as was mentioned in an earlier thread when I did low passes I had to hold down elevator. When I moved the CG to 5" I could do a low pass <3 ft off the ground with my hands off the Tx (not recommending this). The flaps are very effective and with the heavier nose is comes in nicely with a slight nose down pitch (just like the full-size).

I can't stress enough, how well this planes flies! The throws recommended in the previous threads are a good starting point. I would suggest that you dial some expo into the elevator. I didn't change the throw from high and low rate. I just increased the expo on low rates.

You love flying the P47. Best of luck and send pics and a vid if possible.

Cary
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Old 04-06-2011, 02:35 AM
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Default RE: Balanceing the Yellow Aircraft P-47

You can balance any plane by using the thickest part of the wing as the balance point. This method does not apply to delta or swept wing planes.
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