Skymaster F14 Tomcat
02-07-2016, 07:12 AM
#1552
Join Date: Oct 2009
Location: Sparks,
MD
Posts: 69
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Po.
The plane looks done but I have some issues to resolve yet. Huge nose wheel hysteresis, wing sweep controller fail, gear door sequencing problem, ECU setup and downlink , install switch and route wires for wing sweep power, radio programming and test all systems in the plane, fix as required. I'm a slow builder but with some luck and overnight shipping I'm hoping to fly in Florida early March. But if I don't make that date that's OK. I may want to stare at it for a while. I hear they don't live long. ��
The plane looks done but I have some issues to resolve yet. Huge nose wheel hysteresis, wing sweep controller fail, gear door sequencing problem, ECU setup and downlink , install switch and route wires for wing sweep power, radio programming and test all systems in the plane, fix as required. I'm a slow builder but with some luck and overnight shipping I'm hoping to fly in Florida early March. But if I don't make that date that's OK. I may want to stare at it for a while. I hear they don't live long. ��
03-18-2016, 04:53 AM
#1563
dear Barry,
Sorry to read of the loss of your Tomcat... I can only imagine how I would feel if I lost mine...
Can I ask how yours was powered? it fluttered in the up leg of a loop, right?
I am wondering if bending of the arm was the issue though.... given the geometry of the arm, the bearings and the deepness of the aluminium guide on the elevator, I believe very little bending forces are exerted on the arm, even less than if a ball joint would be screwed onto the horn..... Given the flutter, I'd be led to believe the servo mounting let go.... It is true the wood onto which the servo gets screwed is not of the greatest quality.....
Also, I saw those were Savöx servo's? I use quite a few of those as well, but I must say they exhibit quite a bit of play on the gears...might be a factor as well....
Wim
Sorry to read of the loss of your Tomcat... I can only imagine how I would feel if I lost mine...
Can I ask how yours was powered? it fluttered in the up leg of a loop, right?
I am wondering if bending of the arm was the issue though.... given the geometry of the arm, the bearings and the deepness of the aluminium guide on the elevator, I believe very little bending forces are exerted on the arm, even less than if a ball joint would be screwed onto the horn..... Given the flutter, I'd be led to believe the servo mounting let go.... It is true the wood onto which the servo gets screwed is not of the greatest quality.....
Also, I saw those were Savöx servo's? I use quite a few of those as well, but I must say they exhibit quite a bit of play on the gears...might be a factor as well....
Wim
03-19-2016, 11:08 AM
#1566
My Feedback: (3)
Awesome!
We will have food at the field Fri dinner, Sat lunch, and Sat dinner. The Sat dinner is the pilot's dinner that's included with your pilots fee.
See post #10 ... http://www.rcuniverse.com/forum/rc-j...ranton-sc.html
I'll reserve you a parking spot. Want a tent?
Thanks,
Jamie
We will have food at the field Fri dinner, Sat lunch, and Sat dinner. The Sat dinner is the pilot's dinner that's included with your pilots fee.
See post #10 ... http://www.rcuniverse.com/forum/rc-j...ranton-sc.html
I'll reserve you a parking spot. Want a tent?
Thanks,
Jamie
03-19-2016, 05:54 PM
#1567
dear Barry,
Sorry to read of the loss of your Tomcat... I can only imagine how I would feel if I lost mine...
Can I ask how yours was powered? it fluttered in the up leg of a loop, right?
I am wondering if bending of the arm was the issue though.... given the geometry of the arm, the bearings and the deepness of the aluminium guide on the elevator, I believe very little bending forces are exerted on the arm, even less than if a ball joint would be screwed onto the horn..... Given the flutter, I'd be led to believe the servo mounting let go.... It is true the wood onto which the servo gets screwed is not of the greatest quality.....
Also, I saw those were Savöx servo's? I use quite a few of those as well, but I must say they exhibit quite a bit of play on the gears...might be a factor as well....
Wim
Sorry to read of the loss of your Tomcat... I can only imagine how I would feel if I lost mine...
Can I ask how yours was powered? it fluttered in the up leg of a loop, right?
I am wondering if bending of the arm was the issue though.... given the geometry of the arm, the bearings and the deepness of the aluminium guide on the elevator, I believe very little bending forces are exerted on the arm, even less than if a ball joint would be screwed onto the horn..... Given the flutter, I'd be led to believe the servo mounting let go.... It is true the wood onto which the servo gets screwed is not of the greatest quality.....
Also, I saw those were Savöx servo's? I use quite a few of those as well, but I must say they exhibit quite a bit of play on the gears...might be a factor as well....
Wim
It is very clear what had happened, the inferiority of the blue arm twisted and failed. The servos were intact and in their place. Even the left stab which didn't depart from the linkage, that the arm had a very mild twist when held against metal straight edge and light. Savox servos are probably not your first choice of servos, but held and performed perfectly, with no more slop than any JRs.
03-21-2016, 08:39 AM
#1568
Getting back to the 14 since all current projects are wrapping up and I was wondering if anyone could suggest a futaba heavy duty servo arm to replace the stock SM blue metal arm. It needs to be similar in design since the area it travels is very thin. Something Jim used on his JR servo would be perfect. Thanks
03-21-2016, 10:11 AM
#1570
I considered this since SWBs sit very low on the output shaft, they may work I have some Hitecs laying around I can see if they are too thick
03-21-2016, 12:35 PM
#1572
03-21-2016, 03:21 PM
#1574