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Fliteskin Ta-152 H1
#326
Join Date: Dec 2003
Location: manchester, AE, UNITED KINGDOM
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Looks superb, well done sir, i am just about to let loose with my 2nd kyosho version, yours is awsome, Regarding the V gas engine, i know laser are experimenting with gas fourstrokes, fingers crossed for a V motor, with decent carb
#333
Join Date: Jun 2002
Location: Near Welwyn, UNITED KINGDOM
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Vertical Grimmace is correct. The full-size 152 suffered from defective retracting tailwheels all their (shortish) life. I cannot give specific references at the moment, but I have been researching the 152/190 in depth since c1974....... HTH :-)
#335
My Feedback: (1)
David Andersen notes in his construction article RCM November 1997, that this particular publication speaks about the tail wheel issue. This info may be necessary for anyone entering a TA 152 in competition.
http://www.goodreads.com/book/show/2...ke-wulf-ta-152
As far as the spark plug wire goes, It may bother some, but again from a competition side of things, parts of the engine such as this have to be ignored by the judges.
http://www.goodreads.com/book/show/2...ke-wulf-ta-152
As far as the spark plug wire goes, It may bother some, but again from a competition side of things, parts of the engine such as this have to be ignored by the judges.
#336
Join Date: Jan 2008
Location: Hermitage, TN
Posts: 425
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I found the following info on the tail wheel retraction problems in "Focke-Wulf Ta 152 The Story of the Luftwaffe's Late-War, High-Altitude Fighter" by Dietmar Harmann; ISBN 0-7643-0860-2.
In a report from front line unit III/JG 301 it is mentioned that there are problems with retracting the tail wheel. The cause is unkown, but the load on the hydraulics could be to high. Also, the rollers on the retracting mechanism were jumping out of the tracks.
Brian
In a report from front line unit III/JG 301 it is mentioned that there are problems with retracting the tail wheel. The cause is unkown, but the load on the hydraulics could be to high. Also, the rollers on the retracting mechanism were jumping out of the tracks.
Brian
#338
My Feedback: (23)
I found the following info on the tail wheel retraction problems in "Focke-Wulf Ta 152 The Story of the Luftwaffe's Late-War, High-Altitude Fighter" by Dietmar Harmann; ISBN 0-7643-0860-2.
In a report from front line unit III/JG 301 it is mentioned that there are problems with retracting the tail wheel. The cause is unkown, but the load on the hydraulics could be to high. Also, the rollers on the retracting mechanism were jumping out of the tracks.
Brian
In a report from front line unit III/JG 301 it is mentioned that there are problems with retracting the tail wheel. The cause is unkown, but the load on the hydraulics could be to high. Also, the rollers on the retracting mechanism were jumping out of the tracks.
Brian
But, the way the tailwheel retraction cable on the Ta-152 is done would be very problematic if any twisting if the roller was encountered or the tracks were incorrectly spaced which would allow the roller to pop out.
The Jg301 account was fairly early in the 152's service life snd no other commention is made about tailwheel retraction issues, so it is possible it could have been fixed. Honestly, their are more questions than answers when it comes to many late way German aircraft, which allows us to do what we expect based on known documents.
#342
Thread Starter
My Feedback: (29)
I'd like to make mine functional since it looks much the part and the rest of the arguments are debatable.
The problem is the Sierra air cylinder is too short and if you mount it in the scale position, it doesn't even retract half way.
The solution will be when we design a truly scale tail retract (I'm working on 100% scale mains in 1/5scale at the moment). If I can find a longer cylinder to replace the stock Sierra, it may work.
JG
The problem is the Sierra air cylinder is too short and if you mount it in the scale position, it doesn't even retract half way.
The solution will be when we design a truly scale tail retract (I'm working on 100% scale mains in 1/5scale at the moment). If I can find a longer cylinder to replace the stock Sierra, it may work.
JG
#343
My Feedback: (23)
I'd like to make mine functional since it looks much the part and the rest of the arguments are debatable.
The problem is the Sierra air cylinder is too short and if you mount it in the scale position, it doesn't even retract half way.
The solution will be when we design a truly scale tail retract (I'm working on 100% scale mains in 1/5scale at the moment). If I can find a longer cylinder to replace the stock Sierra, it may work.
JG
The problem is the Sierra air cylinder is too short and if you mount it in the scale position, it doesn't even retract half way.
The solution will be when we design a truly scale tail retract (I'm working on 100% scale mains in 1/5scale at the moment). If I can find a longer cylinder to replace the stock Sierra, it may work.
JG
#345
Thread Starter
My Feedback: (29)
Thomas,
thanks for the offer, I wished we I had known before but I have been working on this quite a while. All the parts are now being CNCed by a friend in WA and a wing mock up will be built to try the retrofit process. The correct pintle angle and rake is built in and will bolt to the main spar.
The down lock parts are for the A and D models though not for the 152 and will be driven by a linear servo.
VG, I will try Carr see what they have.
JG
thanks for the offer, I wished we I had known before but I have been working on this quite a while. All the parts are now being CNCed by a friend in WA and a wing mock up will be built to try the retrofit process. The correct pintle angle and rake is built in and will bolt to the main spar.
The down lock parts are for the A and D models though not for the 152 and will be driven by a linear servo.
VG, I will try Carr see what they have.
JG
Last edited by JGrc; 03-25-2015 at 09:49 AM.
#346
Thread Starter
My Feedback: (29)
Finally I was able to shrink the video and post (I hope). Third flight March 2015, still pretty shy about flying the new airplane!
Some changes were made on set up after the first few flights, reduce the rate and expo to 40%. Also increase the aileron differential from neutral to 20º up 15º down.
https://youtu.be/AodWwKQQsm4
Hopefully better quality videos will come later.
JG
Some changes were made on set up after the first few flights, reduce the rate and expo to 40%. Also increase the aileron differential from neutral to 20º up 15º down.
https://youtu.be/AodWwKQQsm4
Hopefully better quality videos will come later.
JG
Last edited by JGrc; 06-01-2015 at 08:54 PM.
#347
Finally I was able to shrink the video and post (I hope). Third flight March 2015, still pretty shy about flying the new airplane!
Some changes were made on set up after the first few flights, reduce the rate and expo to 40%. Also increase the aileron differential from neutral to 20º up 15º down.
https://www.rcuniverse.com/forum/AodWwKQQsm4 Hopefully better quality videos will come later.
JG
Some changes were made on set up after the first few flights, reduce the rate and expo to 40%. Also increase the aileron differential from neutral to 20º up 15º down.
https://www.rcuniverse.com/forum/AodWwKQQsm4 Hopefully better quality videos will come later.
JG
We have been looking forward for that video for a long time !!!
very nice!!!!
One of the most beautiful planes.
Last edited by dgiatr; 06-01-2015 at 09:21 PM.