Harlock RC Viper 140
03-20-2019, 10:22 AM
#76
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Viper jet 140 with hv69 servos
I am building a Viper Jet 140 and incorporating MKS HV69 servos, thorough out. However, I am having difficulty locating metal servo horns for the HV69 servo. This is a 6mm, 25 tooth pinion servo. Does anyone have a source of what servo horns they used, on the HV69? The length of horns recommended for the VJ are 25mm, 20mm, and 12-14mm. Any help would be greatly appreciated.
Thanks!
Thanks!
03-20-2019, 10:26 AM
#77
My Feedback: (53)
I am building a Viper Jet 140 and incorporating MKS HV69 servos, thorough out. However, I am having difficulty locating metal servo horns for the HV69 servo. This is a 6mm, 25 tooth pinion servo. Does anyone have a source of what servo horns they used, on the HV69? The length of horns recommended for the VJ are 25mm, 20mm, and 12-14mm. Any help would be greatly appreciated.
Thanks!
Thanks!
03-20-2019, 05:35 PM
#82
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Thank you gentlemen!
Also, I've had trouble locating a longer servo arm, 25mm for the ailerons, period. I ended up using a cyclic arm off of an Align 600 helicopter. I only had three. This is a long servo arm that fits the spline and has a 2mm hole at 20 and 25mm. I used 2 of these servo horns for the ailerons(25mm hole) and used 1 for one of the elevators(20mm) hole. But I am one short. I can't seem to find this horn on any of the sites. The horn has a "F" stamped on it. If I could find another 2 more of these I think I would be set. I need one more for the other elevator half and one more for the rudder. Right now I just have a plastic horn that comes with the HV69 on the rudder. I bought a couple of metal horns from Aeropanda (MKS). However, they did not fit the pinion. I have been searching for the correct horns for the last week and have come up short. I will try Esprit and see if I can find something. I will attach a few pics so all can see what I am doing. It was a challenge to get the HV69 servos to fit in VJ. I have one more elevator to go, and then tackle the nose wheel steering for the ER 30 nose wheel.
Thanks, again,
G. Vargo
Also, I've had trouble locating a longer servo arm, 25mm for the ailerons, period. I ended up using a cyclic arm off of an Align 600 helicopter. I only had three. This is a long servo arm that fits the spline and has a 2mm hole at 20 and 25mm. I used 2 of these servo horns for the ailerons(25mm hole) and used 1 for one of the elevators(20mm) hole. But I am one short. I can't seem to find this horn on any of the sites. The horn has a "F" stamped on it. If I could find another 2 more of these I think I would be set. I need one more for the other elevator half and one more for the rudder. Right now I just have a plastic horn that comes with the HV69 on the rudder. I bought a couple of metal horns from Aeropanda (MKS). However, they did not fit the pinion. I have been searching for the correct horns for the last week and have come up short. I will try Esprit and see if I can find something. I will attach a few pics so all can see what I am doing. It was a challenge to get the HV69 servos to fit in VJ. I have one more elevator to go, and then tackle the nose wheel steering for the ER 30 nose wheel.
Thanks, again,
G. Vargo
03-21-2019, 03:39 AM
#83
My Feedback: (53)
Thank you gentlemen!
Also, I've had trouble locating a longer servo arm, 25mm for the ailerons, period. I ended up using a cyclic arm off of an Align 600 helicopter. I only had three. This is a long servo arm that fits the spline and has a 2mm hole at 20 and 25mm. I used 2 of these servo horns for the ailerons(25mm hole) and used 1 for one of the elevators(20mm) hole. But I am one short. I can't seem to find this horn on any of the sites. The horn has a "F" stamped on it. If I could find another 2 more of these I think I would be set. I need one more for the other elevator half and one more for the rudder. Right now I just have a plastic horn that comes with the HV69 on the rudder. I bought a couple of metal horns from Aeropanda (MKS). However, they did not fit the pinion. I have been searching for the correct horns for the last week and have come up short. I will try Esprit and see if I can find something. I will attach a few pics so all can see what I am doing. It was a challenge to get the HV69 servos to fit in VJ. I have one more elevator to go, and then tackle the nose wheel steering for the ER 30 nose wheel.
Thanks, again,
G. Vargo
Also, I've had trouble locating a longer servo arm, 25mm for the ailerons, period. I ended up using a cyclic arm off of an Align 600 helicopter. I only had three. This is a long servo arm that fits the spline and has a 2mm hole at 20 and 25mm. I used 2 of these servo horns for the ailerons(25mm hole) and used 1 for one of the elevators(20mm) hole. But I am one short. I can't seem to find this horn on any of the sites. The horn has a "F" stamped on it. If I could find another 2 more of these I think I would be set. I need one more for the other elevator half and one more for the rudder. Right now I just have a plastic horn that comes with the HV69 on the rudder. I bought a couple of metal horns from Aeropanda (MKS). However, they did not fit the pinion. I have been searching for the correct horns for the last week and have come up short. I will try Esprit and see if I can find something. I will attach a few pics so all can see what I am doing. It was a challenge to get the HV69 servos to fit in VJ. I have one more elevator to go, and then tackle the nose wheel steering for the ER 30 nose wheel.
Thanks, again,
G. Vargo
Any servo arms listed for Futaba fit the MKS unless you go into the micro ie HV93...then it’s different.
03-23-2019, 09:07 AM
#85
My Feedback: (53)
On the flight surface’s, I end up using HV93, that’s after I found out the 69 were like not quite micro size....
04-05-2019, 08:22 AM
#89
My Feedback: (38)
Here is what you have to do to make the MKS 69 servos work on the doors. Kind of a shame to remove the c/f brackets. But that is what happens when you believe the magazine article saying they used the 69 everywhere. I bought the servos before the plane. They fit very good for the flaps but there is no way they will ever fit in the elevator.
04-05-2019, 08:33 AM
#90
I did use the 69's everywhere. I admit that I probably should have been more clear about needing to mod the servo mounts.
The only place I didn't use a 69 was the nose wheel steering which I'm almost positive I mentioned.
Sorry for the confusion, they are great servos and coming up on 100 flights with no issues.
The only place I didn't use a 69 was the nose wheel steering which I'm almost positive I mentioned.
Sorry for the confusion, they are great servos and coming up on 100 flights with no issues.
04-05-2019, 09:26 AM
#91
My Feedback: (38)
I apologise. I did not want come across as being negative. You are right, they are great servos. I am very impressed that you got them in the elevators. My opinion was that they would not fit. Your article convinced me to purchase this jet. I am flying it with a K30 which is enough for me. Dry weight is 10.52lbs, wet weight with 24oz tank is 11.86lbs.
04-05-2019, 10:20 AM
#92
You will love it, again sorry for the confusion and you are correct I should have been more clear, comments are always welcome.
I rarely fly at full bore even with the 45 so the 30 should be a great match.
Our weights are pretty close, be sure to start with the CG further back than they spec'd
I rarely fly at full bore even with the 45 so the 30 should be a great match.
Our weights are pretty close, be sure to start with the CG further back than they spec'd
04-05-2019, 10:35 AM
#93
My Feedback: (53)
Didiwatt, I had also purchased those HV69 (8) specifically for this jet....when I found out they didn’t fit, and because, I really didn't want to destroyed these beautiful servo mount 
on most jet I normally have to redo all the mounts.....These were well done.
I just when through my drawer found a micro Ditex it fit perfectly so it on the rudder....and 3 HV93 that also fit nicely so I got another HV93 for ailerons and elevator’s....used the HV69 for Steering and Flaps....sold 2 to a close friend....and will used the rest eventually (3) for doors or something....
on most jet I normally have to redo all the mounts.....These were well done.I just when through my drawer found a micro Ditex it fit perfectly so it on the rudder....and 3 HV93 that also fit nicely so I got another HV93 for ailerons and elevator’s....used the HV69 for Steering and Flaps....sold 2 to a close friend....and will used the rest eventually (3) for doors or something....
04-08-2019, 06:30 PM
#97
Jenni Alderman
04-10-2019, 09:30 AM
#99
Greg said that they might, but you would need to contact Harlock directly to check: [email protected]. Since he runs the HeliDirect warehouse full time and is not on email or phones (it would most likely go through Larry instead), I thought it would be easier to check with him and let you know here. :-)
Jenni Alderman