by jwhanson » Sun Jun 07, 2015 8:14 pm
A couple years ago there was a post on the forum (CB-1 or Classic) regarding wear on the bolts holding the compression springs. I couldn't find the previous post so I am starting a new topic just as a heads up.
At Oshkosh in 2013 Mark Lightsey showed Jeff a tool designed by Rick Hansen for compressing the springs so the bolts could be removed and inspected. I made my version of the tool and last week we used it to check the bolts. Our Classic has 248 hours on it and has been flying since 2009. Yup...they do wear.
All four bolts had slots worn in them so they were replaced. We plan to replace them every 3 years or 200 hours, which ever comes first.
This is a fantastic tool for compressing the springs and I would recommend making one early in your project.
John and Jeff Hanson HC-012.
A couple years ago there was a post on the forum (CB-1 or Classic) regarding wear on the bolts holding the compression springs. I couldn't find the previous post so I am starting a new topic just as a heads up.
At Oshkosh in 2013 Mark Lightsey showed Jeff a tool designed by Rick Hansen for compressing the springs so the bolts could be removed and inspected. I made my version of the tool and last week we used it to check the bolts. Our Classic has 248 hours on it and has been flying since 2009. Yup...they do wear.
All four bolts had slots worn in them so they were replaced. We plan to replace them every 3 years or 200 hours, which ever comes first.
This is a fantastic tool for compressing the springs and I would recommend making one early in your project.
John and Jeff Hanson HC-012.