RE: 1/4 Scale F4U-1A Don Smith Plans Build  
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RE: 1/4 Scale F4U-1A Don Smith Plans Build - 8/28/2008 2:16:18 AM   
rack


 

Posts: 312
Joined: 9/8/2005
From: , IL, USA
Status: offline 		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

(in reply to NCIS)
       Post #: 551

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 8/28/2008 7:39:24 PM   
NCIS


 

Posts: 2901
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		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

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       Post #: 552

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 8/30/2008 12:46:16 AM   
NCIS


 

Posts: 2901
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		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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       Post #: 553

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 8/31/2008 4:35:17 PM   
jmodguy


 

Posts: 266
Joined: 12/9/2001
From: zionsville, IN,
Status: offline 		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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       Post #: 554

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/1/2008 1:06:14 AM   
NCIS


 

Posts: 2901
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		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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< Message edited by NCIS -- 9/1/2008 1:09:33 AM >

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       Post #: 555

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/1/2008 5:38:12 PM   
jmodguy


 

Posts: 266
Joined: 12/9/2001
From: zionsville, IN,
Status: offline 		heres a drawing of the panel
jeff

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       Post #: 556

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 12:06:12 AM   
NCIS


 

Posts: 2901
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		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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RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 12:52:57 AM   
Rocketman612



Posts: 2065
Joined: 1/19/2002
From: Enterprise, AL, USA
Status: offline 		Barry,

If BOTH the wing and stab are at +2deg you will be fine. They both need to be the same. If the stab is more you will get the effect of down thrust.

When I built my TF 60 Corsair I ran simulations in RealFlight with the changes to wing and stab incidence as long as they were the same she few fine. The finished plane fly's great as well with on bad habits.

Pete


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       Post #: 558

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 1:48:23 AM   
rack


 

Posts: 312
Joined: 9/8/2005
From: , IL, USA
Status: offline 		if your going to establish inc you should do it with the elvs in place ,lock them in place with clamps or hook up the servos

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       Post #: 559

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 1:53:59 AM   
rack


 

Posts: 312
Joined: 9/8/2005
From: , IL, USA
Status: offline 		if your going to establish inc you should do it with the elvs in place ,lock them in place with clamps or hook up the servos

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       Post #: 560

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 2:50:43 AM   
rack


 

Posts: 312
Joined: 9/8/2005
From: , IL, USA
Status: offline 		set your inc 0 deg to the wing if that is what the plan recomends, for datum ref your wing should be set at 0 and the stab at plus 1 deg,never neg that seems to be what you have now , you realy should have the wing on to do this right, get your wing sadel perfect first then set the stab to the wing square it up before glueing any thing use screws to hold the stab in placetill you have it perfect i lock the airplane to the bench with clamps and screws to hold it steadly in place, a slight change in the datum line dosnt mater it can be corected by the engs down thrust

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       Post #: 561

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 8:36:17 PM   
NCIS


 

Posts: 2901
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		I tried doing it with the elavators in place but kept getting different readings from them moving even when clamped. I am now using a triangular piece of balsa tack glued to the TE to simulate the same position that the TE of the elevator would be. But I'll try to do it your way again and see what happens. Also the picture is deceiving because if you look at the stab you get that illusion but the incidence meter tells the true story doesn't it? As far as the wing is concerned why do you suggest doing it first? I am not even close to being ready to set the wing. Plus if you remember I am going to make the center section stationary epoxied to the fuse and then fiberglassed together too. I am using the center line on the plan as a datum line for a basis to go from. I am also using 2 laser levels for accuracy. I guess my bigest question is if I do as Rocketman says and just attach it what will and how will that effect the wing? These are all genuine questions and need answers please!!!

Barry

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       Post #: 562

RE: 1/4 Scale F4U-1A Don Smith Plans B... - 9/2/2008 8:41:40 PM   
US185Damiani



Posts: 820
Joined: 3/29/2002
From: Danville, PA, USA
Status: offline 		Barry,
Luke Zollner of Zollner models, alias Adonis alias, Dionysusbacchus did extensive research into this and determined per the real Corsairs that the wing should be 2 degrees positive with the stab to match. if you do a search on his Royal .60 Corsair thread you'll see the documentation and why it is that way. I may be remembering incorrectly but I don't believe I am.
check it out I think you'll be pleasantly surprised.

Mike Damiani

< Message edited by US185Damiani -- 9/2/2008 8:42:11 PM >

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       Post #: 563

RE: 1/4 Scale F4U-1A Don Smith Plans Build - 9/2/2008 10:04:28 PM   
rack


 

Posts: 312
Joined: 9/8/2005
From: , IL, USA
Status: offline 		i wouldnt glue any thing until you asemble it , you realy nead to find away to lock in your elrvators even if it means tack glueing them in its much more acurate it takes alittle to corect the stab but alot to change the wing sadel , get the wing right first

(in reply to NCIS)