CARF F4U-1 Corsair build thread
11-22-2020, 08:20 AM
#3777
Well, we were able to get her ready for her first appearance, The Alliance Balsa Bees Bog Bird fly-in. Not quite ready for flight, we were ready for the first engine start. It went very well. I was able to run the engine three time during the day, and taxi up and down the flight line. It was the first time seeing and hearing the Moki 250 for all but a couple in the crowd. She was a big hit. What an impressive plane.
The following users liked this post:
Ken-h (11-23-2020)
The following 3 users liked this post by ram3500-RCU:
The following 2 users liked this post by ram3500-RCU:
GeorgiaFlyer (02-02-2021),
jchorak (02-02-2021)
The following 2 users liked this post by ram3500-RCU:
GeorgiaFlyer (02-04-2021),
Ken-h (03-09-2021)
09-13-2021, 06:01 PM
#3785
Amazing airplanes! I’m envious and maybe someday I can get one. Have you looked at the air safe unit from booma rc that will blow the gear down at minimum psi? I’m not sure if that helps you or not, just a thought. I will have air retracts on one of my hangar 9 corsairs and I think I will use that setup. Thanks for posting the video. Really cool to see 3 in the air. Was the first Corsair ok after the hard landing?
10-03-2021, 10:06 PM
#3787
Hello, is it possible to order this? the manufacturer's site no longer exists 
10-13-2021, 08:40 AM
#3788
I have a Carf Corsair that the leading edge wing dowels are starting to get worn. I got a replacement 3/8" solid carbon rod that I am going to drill out the old dowels and replace with new.
Wondering if any others have seen this wear pattern on the dowels and what you did to repair.
Also have you done any other modification to attaching the leading edge of the wing?
These are the two carbon dowels that are wearing out on the leading edge of the wing.
A close up view of the worn carbon dowel.
This is the receiving end on the fuselage for the two carbon dowels on the leading edge of the wing.
Wondering if any others have seen this wear pattern on the dowels and what you did to repair.
Also have you done any other modification to attaching the leading edge of the wing?
These are the two carbon dowels that are wearing out on the leading edge of the wing.
A close up view of the worn carbon dowel.
This is the receiving end on the fuselage for the two carbon dowels on the leading edge of the wing.
10-17-2021, 07:14 AM
#3790
I had to make a jig and drill out the old ones. Bought a 4 ft solid 3/8” carbon rod to make new pins. Will use the jig for fitting and gluing in the new ones. This was a real pita to do getting the old ones drilled out straight. Got it done and it fits like a glove now! Can't wait to get this bird back in the air!
10-25-2021, 02:08 AM
#3792
My Feedback: (360)
I have a Carf Corsair that the leading edge wing dowels are starting to get worn. I got a replacement 3/8" solid carbon rod that I am going to drill out the old dowels and replace with new.
Wondering if any others have seen this wear pattern on the dowels and what you did to repair.
Also have you done any other modification to attaching the leading edge of the wing?
These are the two carbon dowels that are wearing out on the leading edge of the wing.
A close up view of the worn carbon dowel.
This is the receiving end on the fuselage for the two carbon dowels on the leading edge of the wing.
Wondering if any others have seen this wear pattern on the dowels and what you did to repair.
Also have you done any other modification to attaching the leading edge of the wing?
These are the two carbon dowels that are wearing out on the leading edge of the wing.
A close up view of the worn carbon dowel.
This is the receiving end on the fuselage for the two carbon dowels on the leading edge of the wing.
11-18-2021, 04:43 AM
#3793
Junior Member
Join Date: Jan 2021
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
I don't understand why someone would put both an air system and a hydraulic system on a model like the compARF Corsair. I have eliminated the air system entirely. The same hydraulic system that runs the wings up and down also operates the gear, doors, and tail hook. This has several benefits: 1) saves weight by eliminating the air system entirely, 2) provides a secondary down lock for the landing gear (since fluid is incompressible), 3. fewer problems with leaks since fluid is much more viscous than air, (I can turn the pump on, pressurizing the system, turn the pump off and 3 days later still have 100psi on the gage). and 4) one small 1100mah 3 cell lipo will run the gear up and down for dozens of cycles,(I went flying yesterday, got in three flights with many up-down gear cycles, and the pump battery took 115mah to recharge). All this, plus, the gear motion is so scale-like, no more jumpy-jerky action as with air.
I will be starting on a CARF Corsair in a few weeks.
I have Sierra retracts , robart cylinders and a up3 valve so far. I also have the hydraulic system from CARF for the wings. Any help would be much appreciated!!
I would really like the idea of everything operating hydraulic and don’t mind if it will take a bit to accomplish!
my email [email protected] cell 718-619-3119
thanks Paul
11-23-2021, 12:25 PM
#3794
Amazing airplanes! I’m envious and maybe someday I can get one. Have you looked at the air safe unit from booma rc that will blow the gear down at minimum psi? I’m not sure if that helps you or not, just a thought. I will have air retracts on one of my hangar 9 corsairs and I think I will use that setup. Thanks for posting the video. Really cool to see 3 in the air. Was the first Corsair ok after the hard landing?
11-24-2021, 03:53 AM
#3796
My Feedback: (360)
Folding Wing
[QUOTE=A343;12703986]Anyone who knows if any other electrical conversion of gear/wing is available as Down&Locked apparently is out of business? Or could guide where to find those actuators?
Hi Thomas-
You should contact Mathias Kerstan, email
His web site does not show the conversion, but I am attaching a picture that he sent me. His system does not use amp out for on/off, but rather senses the end points. He feels this is a better solution, as sometimes amp out will stop short due to other factors.
Another plus in my opinion is that his system holds the wing down in compression, rather than tension. In other words, the forces are pushing against the cylinder, instead of trying to pull it apart. (I know of at least one failure of the previous system where the actuator pulled apart in flight, causing the wing to fold, and well...you know the rest of the story ) Not trying to throw shade in any direction, just looking for a better overall solution to better protect the investment in a high end warbird like the CARF Corsair.
My motivation for using him is two fold-to find a more robust solution, as well as parts and support for same.
Hope this helps-
Regards-Mike Oberst
Hi Thomas-
You should contact Mathias Kerstan, email
[email protected]
He is currently doing the CARF folding wing conversions-It is a very robust looking unit. He also does a lot of conversions on Airworld landing gear, and has a good reputation. He is currently doing mine, as well as one other person here in the US that I am aware of. He is quick to respond to email, and seems to really know what he is doing. (Typical German engineering)His web site does not show the conversion, but I am attaching a picture that he sent me. His system does not use amp out for on/off, but rather senses the end points. He feels this is a better solution, as sometimes amp out will stop short due to other factors.
Another plus in my opinion is that his system holds the wing down in compression, rather than tension. In other words, the forces are pushing against the cylinder, instead of trying to pull it apart. (I know of at least one failure of the previous system where the actuator pulled apart in flight, causing the wing to fold, and well...you know the rest of the story ) Not trying to throw shade in any direction, just looking for a better overall solution to better protect the investment in a high end warbird like the CARF Corsair.
My motivation for using him is two fold-to find a more robust solution, as well as parts and support for same.
Hope this helps-
Regards-Mike Oberst
The following users liked this post:
GeorgiaFlyer (11-24-2021)
11-24-2021, 04:05 AM
#3797
[QUOTE=IFLYBVM2;12703987]
Many thanks Mike, exactly what I needed to know ! Do you know if he makes the gear conversion as well?
I totally agree on your remark regarding step-motors, I used Behotec landing gear on an Ultra Flash many years ago.
I’ll reach out to him when I get back home from NYC.
Regards Thomas
Anyone who knows if any other electrical conversion of gear/wing is available as Down&Locked apparently is out of business? Or could guide where to find those actuators?
Hi Thomas-
You should contact Mathias Kerstan, email
His web site does not show the conversion, but I am attaching a picture that he sent me. His system does not use amp out for on/off, but rather senses the end points. He feels this is a better solution, as sometimes amp out will stop short due to other factors.
Another plus in my opinion is that his system holds the wing down in compression, rather than tension. In other words, the forces are pushing against the cylinder, instead of trying to pull it apart. (I know of at least one failure of the previous system where the actuator pulled apart in flight, causing the wing to fold, and well...you know the rest of the story ) Not trying to throw shade in any direction, just looking for a better overall solution to better protect the investment in a high end warbird like the CARF Corsair.
My motivation for using him is two fold-to find a more robust solution, as well as parts and support for same.
Hope this helps-
Regards-Mike Oberst
Hi Thomas-
You should contact Mathias Kerstan, email
[email protected]
He is currently doing the CARF folding wing conversions-It is a very robust looking unit. He also does a lot of conversions on Airworld landing gear, and has a good reputation. He is currently doing mine, as well as one other person here in the US that I am aware of. He is quick to respond to email, and seems to really know what he is doing. (Typical German engineering)His web site does not show the conversion, but I am attaching a picture that he sent me. His system does not use amp out for on/off, but rather senses the end points. He feels this is a better solution, as sometimes amp out will stop short due to other factors.
Another plus in my opinion is that his system holds the wing down in compression, rather than tension. In other words, the forces are pushing against the cylinder, instead of trying to pull it apart. (I know of at least one failure of the previous system where the actuator pulled apart in flight, causing the wing to fold, and well...you know the rest of the story ) Not trying to throw shade in any direction, just looking for a better overall solution to better protect the investment in a high end warbird like the CARF Corsair.
My motivation for using him is two fold-to find a more robust solution, as well as parts and support for same.
Hope this helps-
Regards-Mike Oberst
I totally agree on your remark regarding step-motors, I used Behotec landing gear on an Ultra Flash many years ago.
I’ll reach out to him when I get back home from NYC.
Regards Thomas
11-24-2021, 04:10 AM
#3798
My Feedback: (360)
Yes, he does the LG also. I am running air on both of mine, so he is just doing the wing fold for me.
He will ship you the parts if you are willing to do minor machine work, or you can send the arms to him, and he will do a turn key job, which is the option I chose.
I do know that if you are converting the LG, you do have to return the gear to him for the modifications.
-Mike
He will ship you the parts if you are willing to do minor machine work, or you can send the arms to him, and he will do a turn key job, which is the option I chose.
I do know that if you are converting the LG, you do have to return the gear to him for the modifications.
-Mike
The following 2 users liked this post by IFLYBVM2:
A343 (11-24-2021),
GeorgiaFlyer (11-24-2021)