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  #51  
Old 11-14-2017, 12:17 PM
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vfrazier vfrazier is offline
 
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Quote:
Originally Posted by Toobuilder View Post
Vince,

If you have not explored this, I'd encourage you to take a look.
Got any photos? We'd all love to see exactly what you've done!
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  #52  
Old 11-14-2017, 01:37 PM
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Toobuilder Toobuilder is offline
 
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Originally Posted by vfrazier View Post
Got any photos? We'd all love to see exactly what you've done!
Not assembled yet, but it is almost an exact copy of the RV-8 design. My main execution change was dumping the nylon pillow bearings in favor of spherical bearings pressed into the ends of the torque tube. I also upped the torque tube OD to 1.125, and reversed the actuator (motor is at the top on mine).

I'll post pictures when it's assembled.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

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Harmon Rocket II -SDS EFI instalation in work
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1940 Taylorcraft BL-65 -flying
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  #53  
Old 11-14-2017, 08:47 PM
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Toobuilder Toobuilder is offline
 
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OK, I threw the parts together and snapped a picture.



As with the -8, the torque tube runs behind the back seat and the arms go forward. The torque tube itself is a simple weldment using stock I had in the shop. As stated above, you can see the bearing brackets I made from angle extrusion. The axle is a Hi-lok fastener. The brackets bolt to the lower longerons, and the spherical bearings allow the splay. I had to make new link arms from tubing, and despite the fact that they are longer than the solid aluminum rods that were there before, are slightly lighter. I dumped the lower link joints (with the integrated stud) for normal through bolted units so I could use a larger diameter (0.750) spacer for better load carying ability. The stock actuator was set up for the motor to mount horizontally, so I fabbed up a link to change orientation. The upper mount bolts to the rear seat bulkhead next to the pasenger's left shoulder, and a simple clip ties it into the upper longeron behind the bulkhead.

Like I said: less parts, much beter geometry, stronger, lighter, ....much gooder!
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI instalation in work
RV-8 - Flying
1940 Taylorcraft BL-65 -flying
PA-20-inspired "family truckster" -in work

Last edited by Toobuilder : 11-14-2017 at 09:08 PM.
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  #54  
Old Yesterday, 09:23 PM
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logansc logansc is offline
 
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Mark and the rest of you smart Rocket guys: Finally got around to trying to configure the W&B kernel in my ForeFlight software. It asks for two things I don't understand:

1. The "unique" weight associated with the forward CG point and,

2. The "unique" weight associated with the aft CG point

The forward and aft CG moment arms I know, but unique weights associated with them? Don't think I've ever heard that one.


Lee...
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