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RE: CARF F4U-1 Corsair build thread - 2/21/2013 3:55 AM   
ram3500-RCU



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Status: offline 		This front ring you will want to taper from front to back, leaving a small flat in the front to ensure that the diameter does not change.

The back ring will be 3/16" smaller in diameter. This allows room for the pivot of the hinge, and ensure that the flaps will be flush with the cowl when closed. It is also tapered but in the opposite direction to form a V groove in the two pieces of ply. The back taper is not critical like the front one is.

A disc sander is a handy tool for the taper, and also is handy for the final shaping of the rings, but a sanding block with some 100 grit also works just fine.

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< Message edited by ram3500-RCU -- 2/21/2013 2:21 PM >

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RE: CARF F4U-1 Corsair build thread - 2/21/2013 2:15 PM   
ram3500-RCU



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Status: offline 		I use 2" x 10-32 phillips flat head bolts for the cowl ring, with blind nuts (6 of each). Lowes or Home Depot has this stuff.

Sorry Bruce. I think I told you 1/4 x 20 bolts.

The dowel I used is 1" oak. I soak this in some thin CA when I'm all done to give it more split resistance. These dowels are glued to the ply rings, but not the firewall, to make them removable. Some aluminum foil around the curve of the nose on the fuselage gives a very realistic look, and this is easy to do with the cowl flap assembly removed.

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RE: CARF F4U-1 Corsair build thread - 2/21/2013 2:35 PM   
ram3500-RCU



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Status: offline 		I have been asked about the wood blocks in this picture. On this model, I had a brain fart when I cut the dowels which were already attached to the ring by the time I realized it. I simply made shims to fix the problem. If you cut your dowels correctly the first time, you will not need these plates.

As you can probably see, I neglected to account for the step back to the larger fire wall plate.

Measure twice, cut once. In this case, it would have taken a third time, at least.

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RE: CARF F4U-1 Corsair build thread - 2/21/2013 2:40 PM   
ram3500-RCU



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Status: offline 		Some more close ups of the rings. You can clearly see the V groove.

Also, you see the cowl flaps taped in place and ready for the installation of the hinges.

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RE: CARF F4U-1 Corsair build thread - 2/21/2013 2:47 PM   
ram3500-RCU



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Status: offline 		Here is a look from the inside. The blue line is the tape on the outside. This small gap gives the flaps the room they need to operate. Not much is required because they 'retract' into the groove you made in the ply rings, when they open.

The space between the blue line and the bracket is where the front ring will rest.

You can also see how the blind nut in the cowl mount protrudes through the plywood. This aids in alignment of the bolts when installing the cowl. It is firmly in it's place when you install the bolts from the back, through the cowl flaps.

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RE: CARF F4U-1 Corsair build thread - 2/21/2013 3:00 PM   
ram3500-RCU



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Status: offline 		Also, please note that your supplied wood cowl mounting brackets are NOT the correct shape. They have way too big a radius to fit the shape of the cowl. This is easy to fix. Just hold them up to the front ring after you have it fit to the cowl, draw a line on them and shape them to fit the new curve. They will now fit perfectly.

The Omnipotent CARF strikes again. And they will never admit it. Add this to incorrect embossing, the miss shaped tail gear door area, the incorrect rudder shape, the lack of any indication that this aircraft actually did have wing guns, the completely ridiculous hydraulic wing system, well, I could go on, but it is what it is, still a great plane.

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RE: CARF F4U-1 Corsair build thread - 2/25/2013 12:47 PM   
stivvy


 

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quote:

ORIGINAL: ram3500-RCU

For those building flaps like I did on this Corsair, you will want to attach the flex pipe (supplied but not shown) to the exhaust pipe, with the provided clamp, and then slide the assembly through the hole in the wood ring from the back. This puts the clamp behind the wood ring where you want it.

We will have the shrouds available very soon.



Hi Gary - Unsure if you are receiving PMs ?

Just wondering if my exhausts & bLights have been despached yet, could you let me know.

Thanks

Steve D

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RE: CARF F4U-1 Corsair build thread - 2/26/2013 1:02 PM   
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Status: offline 		 Hi Gary.
Hope all is well can you please e mail me have a few qwestions for you.
Cheers Limey.

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RE: CARF F4U-1 Corsair build thread - 2/26/2013 8:32 PM   
Growler84



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Status: offline 		Gary,
You mentioned the Roto-Flow tanks a while back. These are excellent products, well made and good company to deal with. However, I ran one of the 50oz versions on my 42% IMAC bird and the internal plumbing in the tank would not support the flow requirements of a 3W-170. A big Moki, probably not a problem because they sip fuel. Still, make sure you ground test.

Vegas Corsair update and another lesson worth listening to: For the 4th time now the hydraulic bag/resevoir for the wing fold system sprang a leak and completley soaked the wing center section with hydro fluid. Since this is the fourth time the wing has been soaked in oil Phil decided to withdraw the model from service until we can put together another wing with electric wing fold. We both feel the structure is compromised, all the glue joints and wood are soaked. Luckily it did not happen in flight. We managed to put over 100 flights on it but in the end it succumbed to a Mickey Mouse system.

Oh, thats 100+ 20 minute flights on a Moki 250 with no issues other than the early loss of pushrods before we knew the proper rocker lube interval and to NOT use a silicone lubricant (TriFlow only for us).

We shall return.

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RE: CARF F4U-1 Corsair build thread - 2/26/2013 9:21 PM   
JSZ



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Status: online 		Which type of Triflow may I ask?

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RE: CARF F4U-1 Corsair build thread - 2/27/2013 1:35 AM   
ram3500-RCU



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Status: offline 		Sorry guys. I have been pretty sick for a few days. I'll get everybody answered.

Being self employed, I drug myself out the last couple days but I have been spent by the time I get back home.

However, I have had time to ponder, laying on my back. This usually turns into another item to offer other builders. I thought maybe I would just go ahead and put together a cowl flap kit. I could get the wood parts laser cut, and include everything you need, including a manual, all the parts, a pattern to locate the mounting bolts, and maybe even shortened stand-offs for the Moki to make. All a guy would need to supply is the cowl and the mounting brackets from the kit, plus adhesives. Might have those brackets cut as well since the OME ones don't fit correctly.

Is their enough interest in doing this to warrant the time I would need to invest? What do you guys think?

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RE: CARF F4U-1 Corsair build thread - 2/27/2013 6:55 AM   
Growler84



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Status: offline 		TriFlow website, note the tempurature spread this stuff can handle. We use the drip dispenser most of the time and the spray for number one cylinder when the plane is assembled.

http://www.triflowlubricants.com/Superior_Drip/superior_drip.html

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RE: CARF F4U-1 Corsair build thread - 2/27/2013 12:48 PM   
wphilb


 

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Status: online 		Greg,

Any chance you can source just a wing center section? The fuse and the wing panels should be reusable, no? 

Whit


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RE: CARF F4U-1 Corsair build thread - 2/27/2013 7:55 PM   
Growler84



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Status: offline 		Yes, working a new wing center section currently.

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RE: CARF F4U-1 Corsair build thread - 2/27/2013 9:17 PM   
MRadu



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Status: offline 		Gary,
I'll order a cowl flap kit from you.

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RE: CARF F4U-1 Corsair build thread - 2/28/2013 12:11 AM   
ram3500-RCU



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quote:

ORIGINAL: MRadu

Gary,
I'll order a cowl flap kit from you.

I was thinking, I could have the stand-offs for the cowl flap ring and the three for the Moki made of steel. The average weight needed in the nose is 4.5lbs. This would go a long way to filling that need. Might just need a little in the cowl ring and that would be it.

The builder would not need to calculate this and the correct engine thrust would already be set for him. A few brass shims maybe, for the variance in building.

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RE: CARF F4U-1 Corsair build thread - 2/28/2013 4:35 AM   
ram3500-RCU



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Gary,
I'll order a cowl flap kit from you.

Just spoke with my machinist about the stand-offs. I am going to have those made out of stainless, about the same weight as steel, will look aviation like, and will not need any protective finish.

I'll include 3 for the engine, and 6 for the cowl flaps. I'll have the engine set as a separate item if a guy want to use the stock cowl. He will still need stand-offs and these will already be the correct length, to set the proper thrust angles. I don't want aluminum, because we need the weight anyway.

shims will be included for fine tuning to account for slight variances in building.

What I am seeing so far, the street price on this will be very reasonable. I do want laser cut parts and professionally machined parts. The engine set will be in the 'no brainer' range.

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RE: CARF F4U-1 Corsair build thread - 2/28/2013 4:40 AM   
ram3500-RCU



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ORIGINAL: Growler84

Gary,
You mentioned the Roto-Flow tanks a while back. These are excellent products, well made and good company to deal with. However, I ran one of the 50oz versions on my 42% IMAC bird and the internal plumbing in the tank would not support the flow requirements of a 3W-170. A big Moki, probably not a problem because they sip fuel. Still, make sure you ground test.

Vegas Corsair update and another lesson worth listening to: For the 4th time now the hydraulic bag/resevoir for the wing fold system sprang a leak and completley soaked the wing center section with hydro fluid. Since this is the fourth time the wing has been soaked in oil Phil decided to withdraw the model from service until we can put together another wing with electric wing fold. We both feel the structure is compromised, all the glue joints and wood are soaked. Luckily it did not happen in flight. We managed to put over 100 flights on it but in the end it succumbed to a Mickey Mouse system.

Oh, thats 100+ 20 minute flights on a Moki 250 with no issues other than the early loss of pushrods before we knew the proper rocker lube interval and to NOT use a silicone lubricant (TriFlow only for us).

We shall return.

Thanks for the tip on the tank Greg. I was planning on using the 50cc one for a ZDZ 210. I'll need to check into that.

You surely are fortunate that your hydraulic system failed on the ground. Sorry for your aggravation and frustration, but I can assure you, you will fall in love with the electric version.

Thanks for the post.

Gary

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RE: CARF F4U-1 Corsair build thread - 2/28/2013 7:14 AM   
booker-RCU



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Status: offline 		Gary - Do you think your cowl flap system will work on the Birdcage Corsair? You know the one.

Galen



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RE: CARF F4U-1 Corsair build thread - 3/1/2013 1:50 AM   
ram3500-RCU



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ORIGINAL: booker-RCU

Gary - Do you think your cowl flap system will work on the Birdcage Corsair? You know the one.

Galen



Hello Galen. Good to here from you. I believe the principle will work on that model. The parts would need to be scaled down, and smaller servos would probably be necessary. As long as the top two cowl flaps are fixed closed, as in all but the very early prototypes, you have a place to put the servos. It works best with two.

I had a computer failure a while back, and lost much of my older pictures including the ones of that airplane. Otherwise, I may be able to be more specific. I know for sure that it would take a smaller version of what I make for the CARF.

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RE: CARF F4U-1 Corsair build thread - 3/1/2013 9:47 PM   
ram3500-RCU



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Status: offline 		Update on the gun system for the CARF Corsair guys. We have settled on $395 for the price. This will include everything you need less the batteries. The lights will be 12,000 candle power or better, and the sound will be 110 Db at 10 ft or better. We have worked it out to operate on LiPo batteries instead of AAs.

There will be some minor soldering because the guns install from the outside and are then combined into just one lead from each outer wing panel.

We are installing a system on this currant build, so I will get some nice pictures and video to post.

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RE: CARF F4U-1 Corsair build thread - 3/1/2013 9:58 PM   
JSZ



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Status: online 		Can't wait!

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RE: CARF F4U-1 Corsair build thread - 3/1/2013 10:07 PM   
ram3500-RCU



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ORIGINAL: JSZ

Can't wait!

One of these days, it will even have smoke.

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RE: CARF F4U-1 Corsair build thread - 3/5/2013 1:07 AM   
ram3500-RCU



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RE: CARF F4U-1 Corsair build thread - 3/5/2013 1:10 AM   
ram3500-RCU



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Status: offline 		The template we use to cut the aluminum foil for the formation light bezels. 11/16 I.D. and 1" O.D.

3/32 brass tube works for embossing the fasteners in the bezels.

The formation lights will also work for smaller scale WWII aircraft. All you need to do is cover more of the lens with the aluminum.

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