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  #1  
Old 09-15-2019, 07:00 AM
Camillo Camillo is offline
 
Join Date: Sep 2006
Location: Roma, Italy
Posts: 515
Default Front seat belt attach hole

Hallo. After more than 5 years since kit purchase, my RV4 in nearly ready.

I bought a Crow harness set (front and rear seats). The rear belt attaches have an AN4 hole. The front ones have a wider hole (maybe AN5). I can't understand why.

However, before drilling the aluminium bars on the fuse floor, I would like to know if it is better to drill the wider hole or the smaller one and use a washer to accomodate the space between the bolt and the SS Crow attach.

DWG doesn't call for the hole diameter, even if in the rear seat belt section calls for a 1/4'' (so, AN4).

https://ibb.co/vjG40W9

https://ibb.co/XFDr7ZH

Edit: I found a similar answer in this thread: Capflyer suggests washers instead of enlarging the hole:
http://www.vansairforce.com/communit...+hole+diameter
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RV4 IO-320, Catto 3-blade, Christen, I-BILT
Flight time: 1 hour
Status: test flights
www.rv4.it

ROME, Italy
---
RV9A O-320 D1A, Hartzell C/S prop, slider, I-PRCA
Flight time: 350 hours
Status: SOLD
http://nuke.rv9.it

Last edited by Camillo : 09-15-2019 at 08:47 AM.
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  #2  
Old 09-15-2019, 08:50 AM
Flyhud's Avatar
Flyhud Flyhud is offline
 
Join Date: Jul 2018
Location: Burleson, TX
Posts: 104
Default

I believe the larger holes in the front are to accommodate a bushing that allows the seatbelt attach to pivot, I have the same setup with the crow harness, but will have to go look at my installation to verify.
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  #3  
Old 09-15-2019, 08:55 AM
Camillo Camillo is offline
 
Join Date: Sep 2006
Location: Roma, Italy
Posts: 515
Default Maybe

I ordered some AT6 (hard aluminium tube) from Spruce: 6/32'' i.d. 1/4'' o.d. Will make the bushings from that.
__________________
RV4 IO-320, Catto 3-blade, Christen, I-BILT
Flight time: 1 hour
Status: test flights
www.rv4.it

ROME, Italy
---
RV9A O-320 D1A, Hartzell C/S prop, slider, I-PRCA
Flight time: 350 hours
Status: SOLD
http://nuke.rv9.it
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