glen
Instructor
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Post by glen on Dec 7, 2013 16:44:11 GMT -4
M , don't mean to pee on your parade, but I'm fairly certain that P-47's did indeed have fowler flaps. I think maybe you're thinking of the earlier variants P-43 etc...
Looking really good by the way.
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Deleted
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Post by Deleted on Dec 7, 2013 17:58:05 GMT -4
If you google "P-47 Walkaround", you'll get tons of great pics on the flap setup, along with every inch of the aircraft. Attachments:
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Post by yorcram on Dec 7, 2013 18:10:45 GMT -4
I stand corrected. They are fowler. They just don't extend backwards beyond the wing trailing edge like the p38. The pic Dave posted shows the aileron hing point low as well. Think I will do this on the model as well.
Thnx Glen and Dave :^)
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Deleted
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Post by Deleted on Dec 7, 2013 19:44:48 GMT -4
No worries. You can either use the robart hinges, as per the kit instructions for the flaps, or you can do the ziroli style, cutting the hinges out of either aircraft ply, or phenolic, and then use a brass tube as a bushing, and bolt with locknut. I can show you the Ziroli style, on the Skyraider I'm building.
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Post by yorcram on Dec 29, 2013 11:59:16 GMT -4
Made some progress. Finally hinged the flaps and ailerons. Never like that as it is too easy to mess up and get binding. I don't like the gaps at the hinge line so i added 1/64 ply to the trailing edges to cover them in a more scale manner. Working on the wing fillets, then should be ready for glassing. Should be able to start that in late Jan when I can get back to the project.
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Deleted
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Post by Deleted on Dec 29, 2013 14:16:37 GMT -4
Looks great! One suggestion for the next project, the ply strips are a must, as far as I'm concerned, so totally agree with that, but you can run them with the grain parallel to the wing. Not really a requirement for the flaps, but for the ailerons, gives a bit of flex, just in case the ailerons hit the ply on high rates. You only need enough to cover the gap so that when you're looking straight down on the wing, you can't see gap, airflow will pass right over. It's a bit of playing around to get everything to work right, so big kudos for going for it!!
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Post by yorcram on Dec 30, 2013 10:22:21 GMT -4
I will need to do some more tweaking on the ailerons as they are snug. I will trim back the gap covers a bit once the ailerons are glued in. Looks like I may not be using the dummy engine. Trial fits show that most of it will be cut away leaving only the cylinder heads due to the large frontal area of the crank case. don't want to waste all the good stuff. Once the engine and cowling are installed I will re-visit this to see if it can be used.
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Deleted
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Post by Deleted on Dec 30, 2013 10:48:46 GMT -4
I forget which engine you're using? The cutaway should only be enough to allow air to flow directly onto the cylinder head. Outlet area should be about 3 times the size of inlet, to allow for venturi effect for cooling. One of the biggest mistakes we make as builders is having too much inlet, and not enough outlet, which actually makes the problem worse, by trapping air in the cowl.
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Post by yorcram on Dec 30, 2013 21:34:06 GMT -4
I am using the rcfg20cc. The crank case housing is large compared to a glow and the dummy appears to sit too far back against the rest of the engine. I will know better when I do the final cowl fit. The air intake should be 1/2 the area of the exhaust outlet for airflow. That is what I like to use.
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Deleted
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Post by Deleted on Dec 30, 2013 22:54:39 GMT -4
1/2 is pushing it, but I'm not enough of a gasser expert yet to be certain. I'm sure Glen, Al and some others can chime in. That is a big head, space would be tight. I've only set them up for 4 strokes. I'm hoping to put the dummy radial in my Sukhoi, but that cowl is huge, so lots of room to play with.
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Post by yorcram on Jan 3, 2014 21:30:11 GMT -4
Sealed the wood today. Lil sanding and time for glass. Not sure how I will put th glass over the tail area. But that will have to wait a few weeks. Still not sure on the colour scheme yet. Have a few in mind but can't decide. Got a new book coming on the P47 so may see another scheme there :^) Want it visible on a grey day, but not a common scheme.
M
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Deleted
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Post by Deleted on Jan 3, 2014 22:41:51 GMT -4
I've got a Sqn Signal book on the P-47, and an Osprey one, P-47 VS Me-109, let me know if you'd like to borrow.
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Post by yorcram on Jan 4, 2014 10:16:02 GMT -4
Thnx Dave, I will keep that in mind. I have a book on pacific p47 & p51s and an Osprey publishers p47 book on the way.
M
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Deleted
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Post by Deleted on Jan 6, 2014 16:13:41 GMT -4
Mine are right here, right now! lol
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Post by yorcram on Jan 28, 2014 9:44:21 GMT -4
Not going as fast as Dave :-)
plane is glassed. No longer sell Z-poxy so I used the 'new' user friendly product. Looks, smells and acts like water based polyurithane, only costs more. ;-)
started hinging the controls, have the elevator and flaps on. Soon will do the rudder and ailerons. Need to open up wing for access to the e-flight retracts. Legs should be here friday (backorder) so it may be able to stand on its own for the weekend.
After that is it time to install all the plumbing, then prep and paint.
m
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Deleted
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Post by Deleted on Jan 28, 2014 11:14:18 GMT -4
Cool. What did you use to seal the balsa, prior to using the water based stuff? I lucked out and got two boxes of Z-poxy resin when I was at AMR. Hopefully I'll find more at the WRAM show.
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Post by yorcram on Jan 29, 2014 10:57:09 GMT -4
I used the WBP as per the instructions. brush coat on, sand with 400grit, lay cloth out.
Lat of the hinges are drying so time for plumbing. never cared for this part. lotta time, little to show.
m
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Post by yorcram on Mar 9, 2014 16:05:01 GMT -4
Finished painting and added the decals. Did a P47 from the US 23rd FS. Still some work ahead but getting there.
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Deleted
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Post by Deleted on Mar 9, 2014 19:41:25 GMT -4
Excellent. Spring maiden!!
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Post by Richard on Mar 10, 2014 7:26:48 GMT -4
WOW , LOOKS GREAT !
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Post by coyote on Mar 10, 2014 16:27:19 GMT -4
AWESOME looking Marc!
Should fly like a trainer.
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glen
Instructor
Posts: 647
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Post by glen on Mar 10, 2014 17:17:19 GMT -4
Excellent Marc, can't wait to see it in the air.
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Post by steve on Mar 10, 2014 20:13:29 GMT -4
Nice airplane Marc. Surprising a 20cc airframe would use 1 servo for ailerons. Nice cockpit detail. Where did you get it from?
Steve
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Post by yorcram on Mar 11, 2014 7:31:44 GMT -4
The kit called for a Nitro .60 so old school used 1 aileron. I converted to separate servo ailerons along with the 20cc. I got the cockpit kit from Dave along with a drop tank and dummy radial. Unfortunatly I won't be using the dummy radial as the 20cc crank to prop base is short and the dummy radial would sit on the cylinder head. Only part that would be usable would be the rocker heads. not going to ruin a good dummy for that. I will look at something else to busy up the front end.
m
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Deleted
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Post by Deleted on Mar 11, 2014 20:16:39 GMT -4
You'll love it with the 20cc gasser, I'm still amazed at the performance of the TF Corsair with one, and zero nose weight required. The two aileron servos are a must, something I do with all my aircraft even if the plans call for one. Same with elevator, if I can work in two servos, I do. I've had one fail in the past, and was still able to safely recover. I also lost an entire side, horizontal stab and elevator, due to flutter, long ago, but thanks to dual elevator servos, it was a non-event, and landed safely, to fly again the next day.
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