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TF GS P47 Build - yeah another bloody one!!

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TF GS P47 Build - yeah another bloody one!!

Old 06-29-2014, 06:18 PM
  #10376  
Peter_OZ
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Tom,
you will have to hang on to the jug now you are enjoying flying it again.

I spent weekend rebuilding the inner gear doors on the mustang, slow process wating for expoxy to cure enough to start on next step. Been too cold to work at night in the shed of late so has been weekend work only. We had about 5C here overnight which is damn cold for us!!

Bit of luck gear doors might be done over next weekend then I can get back on the P47.

cheers
me
Old 06-29-2014, 06:27 PM
  #10377  
marksp
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FS: TF GS P-47D RTC bundle w/DLE55, J'Tec, & Robart (all brand new in box)

http://www.rcuniverse.com/market/item.cfm?itemID=986282
Old 06-30-2014, 05:21 AM
  #10378  
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Pete. The Jug isn't going anywhere. No one will pay the money I want for it. I knew that when I did that.
Old 07-03-2014, 01:27 PM
  #10379  
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well keep it and enjoy it. buy a heli to pander to your hovering fetish lol
Old 07-03-2014, 07:45 PM
  #10380  
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I do have a Heli. But I would much rather hover my PAU Edge.
Old 07-06-2014, 02:43 AM
  #10381  
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Hi Tom.
i am having trouble tuning my engine since the carb is just inside the cowl and I am having hard time getting it set up due to the vacuum from the prop slipstream.
i am thinking on putting on the elbow that you installed in yours.
is the installation pretty easy? Do you have to re route the throttle cable? does the elbow comes with the necessary parts like insulator, bolts ..etc?
sorry for all the questions but this engine is driving me crazy.

thanks
Fabio
Old 07-06-2014, 07:36 AM
  #10382  
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I'm not sure if the insulators came with it or not. I thinkit did. I know I had to modifi them but don't remember why without going back through the threads. I did have to modify the throttle lincage. I actualy moved the servo and made a new bracket for the servo. Went from a rear carb to a side carb. If your already running a G-62 you may not have to. Youll just have to see.
Old 07-06-2014, 12:14 PM
  #10383  
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Fabio

What engine are you using ? as I am using G-62's in both of my birds with really short volicity stacks (spelling) and have not had any problems with the cowl, also do you have a dummy engine in the cowl? if not you may have to put in an air dam. one other thing you may not have enough air exit area.

Pic's of your set up might help in getting a good answer.

Just my thoughts on your ?

Cheers Bob T
Old 07-06-2014, 04:29 PM
  #10384  
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Thanks guys for the reply.
I am trying to run a g62.
What is happening is the engine has a great idle but at full throttle it dies down or it acts up, no steady at all.
I tried with both the velocity stack just sticking out the cowl and with the velocity stack off.
At full power as it hesitates I can put my hand right BEHIND the cowl opening where the carb is so to slow the slipstream from the prop and the engine works fine, as soon as I remove my hand it starts to act up again.
This all with all kinds of needle adjustments.
So here what I am thinking....easiest thing first. The engine it is years hold and perhaps the carb metering membrane is getting old and does not hold its shape as the prop wash creates a vacuum thus the erratic running at full throttle. I am buying a rebuild kit tomorrow at my local mower shop and I should be able to see if it fix it by the middle of this week.
if this doesn't work than I am forced to use the 90 deg elbow and point the carb toward the back. Hopefully that will fix it.
I do have a dummy engine in the front of the cowl and I will post a couple of pics after I rebuil the carb and see if it run with the cowl on.

Strange to me that Bob has no problem with similar set up but I do. I will not be surprised if the rebuild kit does the trick.

thanks for all the help.....I will keep you posted.

Fabio
Old 07-06-2014, 04:53 PM
  #10385  
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You may also want to try a pressure line ran into the fuse fom the diaphragm. If you don't already have one. Eugen has the V-Stack sticking out of the cowl with the pressure line to the fuse and there is no better running G-62.
Old 07-07-2014, 03:41 AM
  #10386  
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Fabio

When I said a short stack on the valosity stack ( spelling) mine sticks up about 1/4 on the aft side and flush on the fwd adge I also use the tube from the diaphragm plate in to the fuse. on my first cowl I first tried a 1inch whole opposite the carb covered on the in side with a piece of plastic screen material, and that did not help.
will try to post a pic of the way I let the air thru the dummy engine

Cheers bob T
Old 07-07-2014, 03:56 AM
  #10387  
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lets see if I can post a pic, This is the corsair but I used the same hole pattern on both birds. can't find the 47 pic I think I may have lost it when the H/D crashed last time the round holes are 3/8 & 5/16 hope this helps

Cheers Bob T
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Old 07-07-2014, 03:28 PM
  #10388  
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Fabio,
I fitted the carb bend to my G62 in the seafury. The conversion kit I got had the insulators with it and yes had to change throttle setup and linkages. Not a big deal. You will need at least an inch clearance from firewall to carby mouth.

agree with Tom, solder a brass tube into the hole on top of the carb where the diaphram breathes and run a tube into the fuselage so it has constant pressure reference. Seafury run very well like that. I also went to a 21x12 prop to get RPM up into the powerband of over 7500rpm.

I then fitted a GT-80 twin!
cheers
P

Old 07-13-2014, 07:00 PM
  #10389  
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I'm working on the Jug again. I glued the yellow nirod into the mounting screw holes for the cowl. They seem to be holding tight. In the process of drilling some lightening holes into the led in the balast box. Want to remove 8oz from it. Borowed a friends scale to see how much I'm taking out. Pictures tomorrow. Should be test flying the day after. The weater forcast looks good for now.
Old 07-13-2014, 07:36 PM
  #10390  
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good work Tom. no 47 progress as I am rebuilding the inner gear doors on the 51. Doors themsselves have been rebuilt but one has a warp in it so I have it clamped to get the desired curvature I need.

Rehinge is next but have to get longer air cylinders as I moved the control horns out a little to get more leverage but geometry dictates a cyclinder of 1 1/4 to 1 1/2" of stroke. I will run them straight down onto a suitable bracket.
Waiting on new cylinders to arrive as old ones are only 1" of stroke.

Then back to the 47!
Old 07-14-2014, 08:35 AM
  #10391  
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Here is pictures I promissed. I didn't reach my goal of 8oz. I did remove 6.2. I'll see how that works.
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Old 07-14-2014, 12:23 PM
  #10392  
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Great job tom as usual.....
hey since you have the cowl off how about a couple of pics of the 90 set up?
I will buy you a cup of coffee next time I see you!

thanls all for the help and replies....

fabio
Old 07-14-2014, 12:45 PM
  #10393  
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You cought me at the right time. It's getting ready to storm and I won't be going out in the shop till it Quits.

Hope this is what you wanted. If I remember corrwectly I had to cut a passage in the insulator block for the pulse line. Check yours to see if the pulse holes line up when you get it.
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Old 07-14-2014, 02:07 PM
  #10394  
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Excellent job as usual Tom, thanks for the pictures.
One last question......how did you turn the fuel nipple? mine will point in the wrong direction and feels pretty tight to turn with the pliers. Just asking before I mess something up...

Thanks

Fabio
Old 07-14-2014, 02:31 PM
  #10395  
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I turned it with plyers. I tought mine would break also but didn't. If it broke, I was going to replace it with one from a lawn mower shop. Dont forget to tap on the top of the angle once you turn it. I think it's on a taper so you have to seat it again.
Old 07-15-2014, 03:47 AM
  #10396  
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Fabio

OLD tom is right good broad headed plyers pull a bit and twist, and then tap to reset. Hay Tom nice set up on the carby and goodpic;s.


Cheers Bob T
Old 07-15-2014, 03:56 AM
  #10397  
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I forgot to mention but it showed in the picture. The high needle had a roll pin through it for a T handle. I took it out and cut a slot with a cut off wheel for a flat head screw driver. The T handle interfered with the muffler and I couldn't get to it with the cowl on. also had to drill an access hole in the bottom of the cowl. Now it's adjustable with a long screwdriver with the cowl on or off.
Old 07-15-2014, 02:24 PM
  #10398  
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Nothing to report today other then the Polar Vortex struck in the middle of July. Went out to the field but once I got out of the Van I knew that the plane was not coming out. I had a jacket with me but I was still cold after I put it on so I came back home. Maybe Thursday.
Old 07-15-2014, 05:24 PM
  #10399  
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Yea man not any better hear, the weather is the pitts, I am beginning to wonder if we are going to have any summer as I can already tell the difference in day lite hrs.

So much for global warming

Cheers Bob T
Old 07-17-2014, 02:40 PM
  #10400  
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[TABLE="class: tborder, width: 100%, align: center"]
[TR]
[TD="class: alt1, bgcolor: #F5F5FF"] Had a great day at the field. Flew the Jug 4 times today. Bob 3 times and me once. It is fair to say that my friend Bob is one of my best and oldest flying buddy. He might even have more flights on my P-47 then I do. I'll be posting a video soon and you'll be able to tell why I let him fly my plane as much as I do. He's one of the Best Warbird Pilots around here. Plus I like to see my plane fly and I can't do that as well if I'm flying.

How about some real weathering? [/TD]
[/TR]
[/TABLE]
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