GROUP BUILD - Top Flite Giant Scale F4U Corsair
10-04-2015, 05:56 PM
My Feedback: (6)
Hi Steve
Go to the endex post # 1 in the wing section there is some pic's of it from the front, I would look, but have to be on the road at 6 am so I am off to bed, if you can't find them Pm me and I will try to see if I still have them in my old file by coming wednesday and reply to your pm.
Cheers Bob T
Go to the endex post # 1 in the wing section there is some pic's of it from the front, I would look, but have to be on the road at 6 am so I am off to bed, if you can't find them Pm me and I will try to see if I still have them in my old file by coming wednesday and reply to your pm.
Cheers Bob T
10-07-2015, 04:32 AM
Join Date: Jun 2012
Location: Bristol, CT
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Well, it was quite easy getting back into the build. Been making some progress. I roughed in the wing tips and finished off the tail block. I still have to tune up the tips and sharpen them up a bit, but the rough shape is there. Also laid up the tail wheel doors and cut the opening. Mostly been just filling and sanding and getting ready for glass. I think the biggest task remaining will be mounting all of the gear doors. For some reason, I'm dreading it. Starting to look like something though.
10-10-2015, 02:37 PM
My Feedback: (6)
Hay Steve
If you have not made any yet I still have my molds, and I can lay some up so you would have the skins you would have to do your hinge's and what ever to the in side.
Just let me know as long as you are not in a big hurry 13 & 14 maybe then it would have tobe my first day off ater the 30th.
Cheers Bob T
If you have not made any yet I still have my molds, and I can lay some up so you would have the skins you would have to do your hinge's and what ever to the in side.
Just let me know as long as you are not in a big hurry 13 & 14 maybe then it would have tobe my first day off ater the 30th.
Cheers Bob T
10-10-2015, 03:33 PM
Join Date: Jun 2012
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Thanks Bob. I laid up two sets knowing that the first one would more than likely be a practice run and have to be recut. I was right. I should be ok, but ill let you know.
11-08-2015, 08:25 PM
Been working on giving it some love with a carb kit, re plum the fuel system, Replace all the air lines and install a Robart variable speed valve. New switches, NoBS A123 2500mah battery, Futaba Rx, replacing some servos, RC-100 for kill switch.
May have it ready to maiden by the weekend. Will post photo's
Hey Saramos been awhile. the 4in table saw I bought from you is still going strong after many moons and a lot of building. .
Pete
11-09-2015, 05:37 AM
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hi guy's well I came close to flying My F4U Giant Corsair last week. up until It spit out the timing magnet on the hub. taxied it for 2 min with out any issues.
It's a RCGF 60 cc engine with a 23-8 Falcon prop. I contacted RCGFUSA in AZ and talked with Joe Nelson. He told me of the First Generation of those engines
and is sending me a replacement magnet. might have it operational by the end of the week. A few other things I changed, I went with the Electric Robart gear
no issues and they work great. The only thing I have to do is figure out how to get the carb primed so it will start easier. I do have a servo choke but until it's primed it will not fire. Any ideas? john Taylor Corsair Brotherhood #96
It's a RCGF 60 cc engine with a 23-8 Falcon prop. I contacted RCGFUSA in AZ and talked with Joe Nelson. He told me of the First Generation of those engines
and is sending me a replacement magnet. might have it operational by the end of the week. A few other things I changed, I went with the Electric Robart gear
no issues and they work great. The only thing I have to do is figure out how to get the carb primed so it will start easier. I do have a servo choke but until it's primed it will not fire. Any ideas? john Taylor Corsair Brotherhood #96
11-09-2015, 09:11 AM
Have a question about the "Stall Strip" on the right wing leading edge on the full scale F4U.
Did anyone put one on their TFGS Corsair? How large did you make it? Did it help reduce tip stall?
Thanks,
Pete
Did anyone put one on their TFGS Corsair? How large did you make it? Did it help reduce tip stall?
Thanks,
Pete
11-17-2015, 02:20 AM
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I dont think that most guys even realized that it was there on the full scale let alone put it on their 1/5 scale. The full scale was only something like 6 inches long and 1 inch wide. That would equate to something like 1.2 inch long. I really doubt that it would make any aerodynamic difference in our models as there were changes in the design to give the best possible flight charecteristics. These arent EXACT copies of the full scale F4U's. That being said, you could always do some testing yourself to find out. Fly it without and see what the stall looks like and then with it and see if theres a noticeable difference.
11-17-2015, 06:17 AM
I dont think that most guys even realized that it was there on the full scale let alone put it on their 1/5 scale. The full scale was only something like 6 inches long and 1 inch wide. That would equate to something like 1.2 inch long. I really doubt that it would make any aerodynamic difference in our models as there were changes in the design to give the best possible flight charecteristics. These arent EXACT copies of the full scale F4U's. That being said, you could always do some testing yourself to find out. Fly it without and see what the stall looks like and then with it and see if theres a noticeable difference.
Still I know Dionysusbacchus added it on his 60 size Royal Corsair and his flew great. Just wanted to know from all the people who participated in this thread in the past 10 years if they added the stall strip and if so how did it work out for them. Interesting question and issue to add to the discussion even if not needed.
Will likely fly it as you suggest and see what the stall characteristics are. And yes the strip was small as your only trying to get the center portion of the right wing to stall to balance out the left wing.
Pete
11-17-2015, 06:32 AM
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Go to face book national association of scale aeromodelers and I have posted my work on my top flite giant corsair I just recently made a neat hatch out of the fuel tank where my switches and fuel dot will be located hinges and holding with magnets
11-17-2015, 12:53 PM
My Feedback: (16)
The stall strip causes an area of disturbed airflow to move over the elevator when the aircraft approaches the critical angel of attack just prior to a stall. The pilot feels this buffeting in the controls. This acts as a stall warning. Since you can't feel the controls the stall strip would not be effective. But if your going to copy the rivits I can see why some would do it. I didn't do the stall strip on mine.
Regards,
Dave
Regards,
Dave
11-18-2015, 03:04 PM
My Feedback: (6)
Well I will add a bit of triva about the stall strip.
From an old pilots hand book there is about 1 paprgraf, says that the strip was added due to the torque from the engine and the big 4 bladed fan when inducing a stall with power on. if you did that the bird would do a violent left roll and you would lose from 500 to a 1000 ft of altitude. So the strip caused the right wing to stall a hair before the left and countered the torque, and that made carrier landings a bit better.
Cheers Bob T
From an old pilots hand book there is about 1 paprgraf, says that the strip was added due to the torque from the engine and the big 4 bladed fan when inducing a stall with power on. if you did that the bird would do a violent left roll and you would lose from 500 to a 1000 ft of altitude. So the strip caused the right wing to stall a hair before the left and countered the torque, and that made carrier landings a bit better.
Cheers Bob T
11-18-2015, 07:27 PM
Interesting, as the stall strip pre-dates the use of 4 blade props and pre-dates the certification of carrier use. It was definitely in use on the F4U-1A. I would have to check reference material to see if it was used earlier. I've read accounts that say the strip only gave a warning of a stall (vibration), and accounts that say the strip improved the tip stall characteristics.
Cheers,
Scott
Cheers,
Scott
Last edited by saramos; 11-18-2015 at 07:30 PM.
11-19-2015, 03:48 PM
My Feedback: (6)
Scott
I sure don't want to start broo ha-ha but just
From all the info I collected on the Corsair way back, some of the -1's had it and some did not, don't have a clue as to why, all I can find is it was due to torque, and the original -1's had the R-1830's with 3 blade props, and when it went to -A1 the engines were R-2800 and produced about 2000 HP, and the addition of the 4 blade, there were a lot other growing pains with the Corsair.
so I will leave it at that, as that's all this old geezer can remember
Cheers Bob T
I sure don't want to start broo ha-ha but just
From all the info I collected on the Corsair way back, some of the -1's had it and some did not, don't have a clue as to why, all I can find is it was due to torque, and the original -1's had the R-1830's with 3 blade props, and when it went to -A1 the engines were R-2800 and produced about 2000 HP, and the addition of the 4 blade, there were a lot other growing pains with the Corsair.
so I will leave it at that, as that's all this old geezer can remember
Cheers Bob T
11-20-2015, 12:37 PM
Well dug out my reference books and came up with the answer.
From Vought F4U Corsair Vol 1 by Tomasz Szlagor, Leszek A. Wieliczko. Publisher Kagero Page 18
"The biggest success was s solving the problem of the port wing drop on landing. The solution proved exceptionally simple a small ( 1 inch[2.5cm] wide and 6 inches [15.2 cm] long) wooden spoiler was added to the leading edge of the starboard wing, just outside of machine gun ports. At high angles of attack the spoiler disturbed the airflow over the starboard wing, reducing it's lift. Now , as the aircraft slowed down on landing approach, both wings stalled at the same time. Keeping the aircraft level. The spoiler was first tested on BuNo 02510, and introduced to serial production beginning with 943rd machine (BuNo 17710)."
Pete
From Vought F4U Corsair Vol 1 by Tomasz Szlagor, Leszek A. Wieliczko. Publisher Kagero Page 18
"The biggest success was s solving the problem of the port wing drop on landing. The solution proved exceptionally simple a small ( 1 inch[2.5cm] wide and 6 inches [15.2 cm] long) wooden spoiler was added to the leading edge of the starboard wing, just outside of machine gun ports. At high angles of attack the spoiler disturbed the airflow over the starboard wing, reducing it's lift. Now , as the aircraft slowed down on landing approach, both wings stalled at the same time. Keeping the aircraft level. The spoiler was first tested on BuNo 02510, and introduced to serial production beginning with 943rd machine (BuNo 17710)."
Pete
11-23-2015, 09:16 AM
Been working on the flaps trying to get the geometry correct so they move together. There is a lot of binding and I will likely only get about 3/4 the travel without really working the HS 645's.
I'm about ready to program some down elevator mix when the flaps deploy. How much down have people been using?? I usually start at 5 or 7 and go from there.
Pete
I'm about ready to program some down elevator mix when the flaps deploy. How much down have people been using?? I usually start at 5 or 7 and go from there.
Pete
