ch-47c
Heliman
Location: san jose, ca
| GYRONitro,
Although that gyro looks like a JMW, I had one years ago and my case was a bronze smoked clear. You could see the gyro inside. It was like a old Bulova watch where you saw the tuning fork vibrating inside. When I looked at your first pic, I saw the double-sided tape on the top of the case. I helped a friend with a GMP that piro'd so quickly when correcting tailrotor it was obvious. What wasn't was the reverse switch. Early Airtronics gyro didn't have a reverse switch so you mounted the gyro upside-down on its top. If you mounted the gyro on its side, it corrected for cyclic pitch or roll depending on the orientation. Look at the plugs that go to the receiver. I never used Airtronics stuff, but they had their own distinct plug. I think they were more similiar to JR, not like Futaba with the key on the side. Airtronics radios were as popular for helis as they were for gliders, but the gyro worked quite well in its time. If you power it up and twist the gyro and the rudder servo should correct for the twisting motion. If it is backwards, flip it upside down and verify it's correct. I may be wrong as this was 1986 when I helped my friend. I learned initially without a gyro, because I couldn't afford the $59.00 for one. I felt like Igor Sikorsky learning to fly his VS300. It was fun.
Blue Angel sounds pretty sure you have JR 100/110. I'm not familiar with those two models. My JR 120 had two round edges for the brass flyweights inside the case. Back then I used Futaba 150 series and JR 120 and 1000.
There was also a Kraft,KO, and GMP gyros, but it seems to me their wires were braided like Futaba AM series servos.
Rich |
