RE: 1/8 scale TopFlite Corsair Mods  
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RE: 1/8 scale TopFlite Corsair Mods - 10/19/2007 6:01:22 AM   
SMUGator



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From: Sammamish, WA, USA
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quote:

ORIGINAL: CorsairJock

Tom,
They don't right, but not all that bad either. I'm thinking it would have been better for the 3 pipes to protrude slightly (maybe about 1/8" or more?), so the outer one could be somewhat flush with the fuselage. Just curious as to what you paid for them, and what all are you getting? They look like they could be adapted to a number of engines by using flexible pipe.

BTW: I experimented a few years ago by using silver solder to 'weld' 3 brass tubes together, attached them to a larger dia 'feeder' tube, and sawed off the 3 at an angle to get the bevel. Never put them in use tho, and never came close to installing them. They are still laying around somewhere.



Hey Jim,

It's been a while, but if memory serves me the whole set-up was $190-ish and includes the connection to the engine and single header pipe and then the unit in the pictures above. There is also a bit of flexible tubing to join the two at the firewall. On my prototypes, I intended for the exhaust pipes to be left longer so that we could custom cut them to scale. I may end up using the front part of the exhaust to connect the the engine and then redesiging the rear section. Need to do some research on materials and melting points as these RCVs are reported to run pretty hot. Don't think it would melt silver solder, but who knows.

Tom

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RE: 1/8 scale TopFlite Corsair Mods - 10/19/2007 9:33:23 PM   
CorsairJock



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From: Parchment, MI, USA
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quote:

ORIGINAL: Wolflord
Did either of you Gibbs or Tom, think about usseing air to retract your tail wheel? I am toying with the idea, and am wondering the pros and cons.


Standard, even a mini servo works fine. Why complicate matters by using air? In addition: many of us are installing the air tank (and valve, etc.) on the wing, rather than in the fuselage. Keeps the lines shorter (meaning the tank supply will last longer), and fewer fittings means fewer problems. If we were to install the tank and valve on the wing, and wanted air to the tailwheel: we would have to use quick disconnects and long lines. Servo keeps it simple and reliable.


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RE: 1/8 scale TopFlite Corsair Mods - 10/19/2007 10:14:54 PM   
timothy thompson


 

Posts: 2761
Joined: 6/19/2004
From: saginaw, MI, USA
Status: offline 		well i took my tf gs out in primer to maiden. WOW it flys like a baby. 33 pounds g-62 wouldnt want the motor to quit it like to fly fast. Landing was a non issue now i can finish it

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RE: 1/8 scale TopFlite Corsair Mods - 10/19/2007 10:16:04 PM   
NCIS


 

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From: Janesville, WI, USA
Status: offline 		CorsairJock,

I put my complete air system in the fuselage out of the way. I don't know if this was the most brillant idea if something goes wrong but I wanted less on the wing. Here is my tailwheel retract and air systems.

Wolflord,

I couldn't find an air operated TW retract. Plus CorsairJock is right, it's easy to even set up the mechanical retract and you can use a standard servo if you want to save money.

Gibbs

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RE: 1/8 scale TopFlite Corsair Mods - 10/20/2007 1:29:42 AM   
mystar46



Posts: 162
Joined: 11/4/2005
From: Kennett Square, PA, USA
Status: offline 		I have been steadily building over the last few months and have caught up with a few of you. I made a hybrid retractable tailwheel. I used the .60 size Robart unit and replaced the yoke assembly with homemade to make it look a little more scale-like. I'm using a Robart slave piston and a simple short pushrod. I am using the pull-pull steering setup that came with the Robart unit and will Y-harness a 48oz/in mini servo for tail wheel steering. You can just see the back of my air cylinder that I mounted to 2 CF tubes that I glued in between the bulkheads. All very strong and light. The tailwheel lines up perfectly with the stock location on the plans and the retracted position looks pretty well on the money too. Many solutions for a common problem.

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RE: 1/8 scale TopFlite Corsair Mods - 10/20/2007 2:36:23 AM   
Paul S.


 

Posts: 132
Joined: 1/8/2006
From: Sunrise, FL, USA
Status: offline 		Thanks Dave for adding great pictures cause thats where I'm at; trying to figure out the pull pull postion and retract. I have a medium tank so I'm not as concerned about adding another T and piston. The servo is another idea I didn't consider. You guys make this building interesting, just when you think it's all laid out, another angle pops in.

Paul S.

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RE: 1/8 scale TopFlite Corsair Mods - 10/20/2007 4:17:01 AM   
mystar46



Posts: 162
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From: Kennett Square, PA, USA
Status: offline 		Paul,

I think I'm going to flip the piston over so the air line nipples face the top of the fuselage. That will give me more room to fit my steering servo in. I'll still have plenty of room to run the lines. I'm going to mount the actuator on the bottom of the cockpit floor with another of the same servo. I'm still contemplating what the mounting bracket will look like for the steering servo. I'll post some more pictures as I progress. I'm also doing RDS (Rotary Driver System) for the ailerons because I didn't like the flex pushrods and wanted no linkages outside the wing skins. I'll post pics of that too when I get further along. Here's a good shot of my completed cockpit.

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< Message edited by mystar46 -- 10/20/2007 4:18:13 AM >

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RE: 1/8 scale TopFlite Corsair Mods - 10/21/2007 11:31:22 PM   
NCIS


 

Posts: 2634
Joined: 5/28/2006
From: Janesville, WI, USA
Status: offline 		Dumb Questions,

I put my hatch back behind the wing for all the fills and switches etc. I was wondering 2 things. I'm going to use the quick fill for fuel and wondered if the distance from the fill valve to the carb will be a problem? Second, Wher should I put the muffler vent tube for my Magnum 120 with a Keleo custom exhaust? Oh yeah do you have to use tubing in the formers for the pull pull wires even with them being nylon coated? I was planning on doing it but just wondered. Here is wher my hatch is.

Thanks,

Gibbs

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RE: 1/8 scale TopFlite Corsair Mods - 10/22/2007 1:50:28 AM   
mystar46



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From: Kennett Square, PA, USA
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quote:

I'm going to use the quick fill for fuel and wondered if the distance from the fill valve to the carb will be a problem?


IMHO that's a long way from the tank and back to the carb. I think you'd be asking for trouble with that one. I'm probably going to use the same type filler on mine and will make another hatch in the front for it.

quote:

Oh yeah do you have to use tubing in the formers for the pull pull wires even with them being nylon coated?


IMHO it's always a good idea to use tubing through the bulkheads, it keeps it guided in the right direction and keeps it smooth as can be. Every bit of strain you can take off the servo makes a difference in performance and longevity.

So you'll have a hatch that basically takes up that whole open area between the bulkheads? I kinda like that. It will look more like panel lines than a hatch. Good thinking!

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RE: 1/8 scale TopFlite Corsair Mods - 10/30/2007 3:01:47 AM   
mystar46



Posts: 162
Joined: 11/4/2005
From: Kennett Square, PA, USA
Status: offline 		Well, this came out better than I had expected! I got the tail steering servo and pull-pull system in place last night. It's so simple it's ridiculous. One thing I hadn't considered was that when the tail wheel is retracted, the pull-pull cables will go limp. If you have enough servo throw, it might still be enough at the end points to make the tailwheel move. I went to the inner-most holes on the servo horn and have plenty of throw for a tail wheel but it is not enough to move it at all when retracted. The whole setup came out so light and strong with perfect control. I just couldn't be happier with the results.

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RE: 1/8 scale TopFlite Corsair Mods - 10/30/2007 10:22:56 AM   
CorsairJock



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From: Parchment, MI, USA
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quote:

ORIGINAL: mystar46
....................................One thing I hadn't considered was that when the tail wheel is retracted, the pull-pull cables will go limp. If you have enough servo throw, it might still be enough at the end points to make the tailwheel move. I went to the inner-most holes on the servo horn and have plenty of throw for a tail wheel but it is not enough to move it at all when retracted.


That's the wholw idea: the tailwheel isn't supposed to be steerable when retracts (up). If it somehow got turned/ steered as it was coming down, or as it was going up: it could create clearance issues as it was going into or coming out of the retract bay. Why would you WANT to steer it when it was up?

Nice looking setup, I especially like that tailwheel bracket/ strut.



< Message edited by CorsairJock -- 10/30/2007 10:25:12 AM >

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RE: 1/8 scale TopFlite Corsair Mods - 10/30/2007 12:22:51 PM   
vasek



Posts: 1977
Joined: 1/24/2002
From: centre, QC, CANADA
Status: offline 		Hi guys, has anyone installed a pair of Sierra .60 ?

Not sure if i should get the 95 deg or 100 deg rotating

thanx V.

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RE: 1/8 scale TopFlite Corsair Mods - 10/30/2007 2:46:20 PM