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1/4 Scale F4U-1A Don Smith Plans Build

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1/4 Scale F4U-1A Don Smith Plans Build

Old 08-20-2008, 05:55 PM
  #551  
NCIS
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

So far not even figuring in the plane the engine weighs 10lbs. 7oz., the dummy radial 1lb. 9oz., and the adapter and Solo prop weighs 2lbs. 8oz. for a grand total of 14lbs. 8oz. I don't think Ill be needing any nose weight. If anything maybe a little tail weight. Now much will the plane with everything weigh finished????]

Barry
Old 08-21-2008, 11:56 AM
  #552  
W HARLEY
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

BARRY,MY PLANE HAS A DA-150 LIKES GEAR 1/4 SCALE,CENTERY SCALE TAIL WHEEL AIR GEAR.AND A PLOT THATS 1/4 SCALE 1LB. I PUT 13LBS OF LEAD IN THE NOISE .BUT IS A BIG PLANE AND FLYS GREAT.WAYNE
Old 08-21-2008, 07:26 PM
  #553  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Today I worked on the modification to make it look like a F4U-7 instead of a F4U-1 thru 4. Part of this process is the raise fuselage part that was added onto the French Navy Corsairs to increase headroom so the pilots could sit higher in their seats and see over the long nose easier. I made a fiberglass mold today to simulate an add on instead of just making it out of balsa and forgeting about the lip that showed it was added as seen in the first picture. I still have a tiny amount of sanding when I take off the glass so it will be semetrically even on both sides and a straight slope up to the peak. I posted the wrong picture so here it goes again. Maybe in the last two you will see what I'm going for.

Gibbs
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Old 08-22-2008, 01:41 PM
  #554  
David Jackson
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Harley,

Would you be so kind as to post some pictures of your Corsair. I am particularly interested in the quality of the main gear.

Thanks,
dlj
Old 08-22-2008, 03:25 PM
  #555  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

daj i am in the process of geating some more picks ,the ones i have are on a dvd and i have not been abible to email them.harley.
Old 08-22-2008, 05:25 PM
  #556  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I cut out the part of the fiberglass that I needed and put a couple coats of my acetone/Bondo spot and glazing putty on it to fill the weave. Next I'll sand and prime it so it's ready to put on when I glass the fuselage. Then Ill epoxy the part I made in place so there is the lip.

Gibbs
Old 08-22-2008, 07:01 PM
  #557  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Here is the part I made after sanding and priming. I'll test fit the part tomorrow when the primer is good and dry.

Gibbs
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Old 08-22-2008, 08:19 PM
  #558  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

NCIS,
The plugs on an R-2800 are silver. The "connector" from the cable to the plug is steel and the cable is actually a copper braid shield. There are 2 cables that leave the ignition ring. One goes to the front plug and the other goes to the rear plug. The front row of cylinders has a cylinder pointing straight down and it has an oil sump mounted between the valve covers. I have a few hours tinkering with them...
Heres a link to a few pics http://www.aircraftresourcecenter.co...8w/walk375.htm
Can't wait to see pics of this beast in the air! Keep it up!
Jeff
Old 08-23-2008, 01:14 PM
  #559  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Jeff,

The colors I'm painting it are the way this particular engine was painted and the colors of the plug wires too. It is a refurbished F4U-7 owned by a Lindsay Walton and the Engineers are Frank Golding and Kurt Heilbronncr. I got this info and the pictures from Bob's Aircraft Documentation. Thats the only reason I'm doing it this way. Although you are correct I need to stay exactly the same as the plane for the judges to see. As far as seeing it fly that will be a long time coming. I still have a long road ahead of me. When it does though I will definitely make a video for all to see. I just pray for many safe landings.

I did a little sanding on the edges of the fiberglass part I made and it fits nicely. Here it is.

Barry
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Old 08-23-2008, 06:59 PM
  #560  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

This is the worst excuse I have ever gotten for a cowling. You would think for $84.00 that Don Smith would have a good product to supply his customers. This thing was full of pin holes and large divets. I am just finishing my second go around with spot putty and an acetone mix brushed on and then primed. It still is going to take one or two more times for it to be perfectly smooth.[:'(]

Gibbs
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Old 08-23-2008, 07:26 PM
  #561  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

the problem is, you wont catch up with the pinholes using
spot putty. it shrinks too much. you need to use Evercoat
light weight body filler. its lighter than bondo, feathers out
to a crisp edge, and doesnt shrink
Old 08-23-2008, 07:32 PM
  #562  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I'll look for it and if I find it I'll try it.

Thanks,

Barry
Old 08-24-2008, 07:33 PM
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Today it was back to building. I planked the rest of the bottom of the fuselage in front of the wing and put in the thick blocks so I can dremel them out for the single pipe that is lower than the two on each side in the area just above the wing. I also built those boxes I was talking about for when the wing goes together there is a space for all the servo wire conections to hide out of the way. Every thing is epoxied in and then coated again with 30 minute epoxy. This was done after the picture. The boxes are made out of 1/8" plywood for strength since I dremeled out the hole in the rib for the boxes. It seems good and strong. Here is what they look like. Also since I am attaching the center section to the fuselage permanently I have decided to put the rx and the rest of the radio system in the wing with a hatch on each side of the wing outside of the fuselage's belly on the bottom side for access need be. The rest of the servos have hatches already except for the TW steering servo.

Gibbs
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Old 08-25-2008, 05:16 PM
  #564  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I finished sanding the planking and large blocks smooth and then dremeled out the areas for the single exhaust pipe on each side at the 5 and 7 OClock positions. I have decided to put my receiver and batteries between ribs #3 and #4 on one side and my lighting and retract servo/valve on the other for easy access. That will be my next step toward getting ready for the wing attachment. First before that I will test run the engine and make sure I don't have any gas leaks. I will also have to check to see that there aren't any leaks where the air lines connect to the two air tanks.

Gibbs
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Old 08-25-2008, 07:53 PM
  #565  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

had a little incedent with my tcraft, moved my waco to scale aircraft
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Old 08-26-2008, 07:32 PM
  #566  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I wanted to check out the fit of the canopy with the fiberglass part on and off and it fits much better with it off. So off to the junk heap with it. I'll just glass the hump when I glass the fuselage. You can see how well it fits without anything and just a bit more fine sanding did it. I have all the pin holes out of the cowling now and decided for budget reasons to make the cooling flaps stay in the open position at 30 degrees. I still need to putty just a little more and I'm going to copy what Graham is doing on his cowling as far as the flaps go. His is a 5 and mine is a 7 so there are differences. Our canopies are identical so all I need to do is make mine slide. Add on from yesterday. I worked some more on my cowling to see how close I could get to Graham,s. The only thing I still need to do is add on the aluminum strips on the top sides, and bottom for a 3-D look. Then the rivets. You can see the top stip in the picture of his cowling.

Gibbs
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Old 08-27-2008, 06:50 PM
  #567  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Keep it up! Thanks for the e-mail replies. I can not wait to see this baby fly.
Peter
Old 08-27-2008, 07:27 PM
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I'm working on the aluminum strips now. there will be 4 total. I'll have to figure out the rivet spacing. I have to order some 1/8" rivets from Micro Fastners tomorrow and then it will be time to make them straight and drill and rivet.

Gibbs
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Old 08-27-2008, 08:16 PM
  #569  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

those rivots dont work well against glass the eng vibration will loosen them up , you would be better off using button head screws with canopy glue on the threads thenfill in the hole in the screw
Old 08-28-2008, 01:39 PM
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Good idea, I think i'll use my number 0 screws that are only 3/16" long. They have a allen head for driving them in and are very low profile.

Gibbs
Old 08-29-2008, 06:46 PM
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I have been spending the better part of 2 days working on my raised cockpit area behind the cockpit for the higher canopy. I also removed the engine so I can do some heavy duty sanding on the fuselage to get it into the proper shape. Right now it looks like it needs to go on a diet. I hope to sand away about 1/16" everywher and maybe even more in some other area. That will leave me with 1/16" or a little under on the fuselage and will also lighten it up a bit. I had to putty around the front of the cockpit sides at the instrument panel so the the new canopies would have a proper fit. It seems as though Grahams Corsair is a little wider in that area.

Barry
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Old 08-31-2008, 10:35 AM
  #572  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Barry,
Here are a couple pics I took of a -5 that was going thru an engine change. Hope it helps... Forgot I had them

Jeff
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Old 08-31-2008, 07:06 PM
  #573  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

Thanks for the pic's Jeff. I appreciate any info I can get my greedy little fat fingers on! I worked on my fuel cap and the fuel tank access hatch today. The fuel fill is a 3W fuel fill that I had to cut the mounting flange off so it would fit flush with the curved fuse. Then I cut a nickle into 3 pieces and used the middle for the hand grip. I dremeled it to make it rounded on the corners.I used some left over aluminum from my Sopwith Pup for the hatch. I will use the same method as I did for the raised rear cockpit aluminum to attach it to the fuse. When I'm done I will grind down the #0 screws to look like flat rivets. I'm taking my fuselage with engine to a fellow RCer who is going to make my exhaust for me. He says he wants to make it out of stainless steel intead of aluminum.

Barry

PS: Graham you are moving along remarkably fast and it is just looking terrific. When do we get to see the pilot? I've still got a year to go or more on mine.
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Old 09-01-2008, 11:38 AM
  #574  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

heres a drawing of the panel
jeff
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Old 09-01-2008, 06:06 PM
  #575  
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Default RE: 1/4 Scale F4U-1A Don Smith Plans Build

I am about to epoxy my tail feathers onto the fuselage and the best I can get for the stab incidence is +2 when it is supposed to be +1 1/4. What will this extra 3/4 of a degree of up incidence do to the flight characteristics of my plane? Here are some pictures of what I'm talking about. In the last picture it's hard to read the needle on the incidence meter but it is directly over the +2. I have never worried about this with smaller birds before but am on this one. The wing is supposed to be +2 so do I add 3/4 of a degree to it to balance things out?
Barry
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