Blain
Well Known Member
The idea of using a Robinson Helicopter style air door has intrigued me. Spring loaded automatic operation. No pilot activation required. In rotor craft both hands are busy in a power failure.
Some have dismissed the idea of having hardware inside the filtered area. I agree, however Frank Robinson wasn't concerned in his certified AC. I think the possibility of parts moving loose can be mitigated with liberal use of lock tite.
So here is my results after a order with Robinson. All factory parts for a R22 with 360. I know derated HP, so I closed up the opening by about 10% to compensate. Here is my assembly before cutting into the finished air box. Thought I would ProSeal the plate to the floor of the FAB. No extra hardware to come loose.
Really wrestling with this mod. FAB is done. If I get this wrong I'm building another![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![](/proxy.php?image=http%3A%2F%2Fi265.photobucket.com%2Falbums%2Fii232%2FBStumpf%2FIMG_20160821_131908980.jpg&hash=75b64da8b3690e8bce4951ba3933b0a5)
![](/proxy.php?image=http%3A%2F%2Fi265.photobucket.com%2Falbums%2Fii232%2FBStumpf%2FIMG_20160821_131331679.jpg&hash=969e8d94f1994045a5825bbc7d2f1b11)
Some have dismissed the idea of having hardware inside the filtered area. I agree, however Frank Robinson wasn't concerned in his certified AC. I think the possibility of parts moving loose can be mitigated with liberal use of lock tite.
So here is my results after a order with Robinson. All factory parts for a R22 with 360. I know derated HP, so I closed up the opening by about 10% to compensate. Here is my assembly before cutting into the finished air box. Thought I would ProSeal the plate to the floor of the FAB. No extra hardware to come loose.
Really wrestling with this mod. FAB is done. If I get this wrong I'm building another
![](/proxy.php?image=http%3A%2F%2Fi265.photobucket.com%2Falbums%2Fii232%2FBStumpf%2FIMG_20160821_131908980.jpg&hash=75b64da8b3690e8bce4951ba3933b0a5)
![](/proxy.php?image=http%3A%2F%2Fi265.photobucket.com%2Falbums%2Fii232%2FBStumpf%2FIMG_20160821_131331679.jpg&hash=969e8d94f1994045a5825bbc7d2f1b11)