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  #11  
Old 03-21-2017, 06:45 PM
Fly2KiteSurf Fly2KiteSurf is offline
 
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Location: Grass Roots Airpark 06FD (central Florida)
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Default ?

http://www.jdair.com/fuel-drain-fair...s-rv-aircraft/
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RV-3, purchased, completed restoration, flew for 18 months, sold www.rv3forsale.com purchased flying RV7 (room for the female homo sapian)
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  #12  
Old 03-21-2017, 07:03 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 554
Default What plastic?

What plastic did you print in...

Hopefully not PLA because if you did, they won't last long as it is biodegradeable...ABS would be better but not sure of its resistance to gasoline. If your printer can get to 235 degrees, you can print in a nylon blend which I have used before and works pretty well...
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  #13  
Old 03-21-2017, 07:28 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
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Quote:
Originally Posted by Fly2KiteSurf View Post
I have these currently installed and recommend them, however with my paint they don't engage as fully as before paint. I thought I would try similar in plastic. The ABS plastic will not scratch paint. These are printed hollow, 4 cover layers, 40% in-fill, weight = 16 grams. I believe the weight could be reduced to 13 grams. Fit check and final tweaking still needed since I sketched these from memory.
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RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

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Last edited by Steve Melton : 03-21-2017 at 07:37 PM.
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  #14  
Old 03-22-2017, 08:02 AM
kaweeka kaweeka is offline
 
Join Date: May 2011
Location: Roseville
Posts: 161
Default

Amazing!!!!
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  #15  
Old 03-22-2017, 12:19 PM
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Lynnb Lynnb is offline
 
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Location: Cedar Hill, TX
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Are you going to try and smooth them any with an acetone wash or fuming? Any chance you want to share some files?

Lynn
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  #16  
Old 03-22-2017, 03:41 PM
dwranda dwranda is online now
 
Join Date: Jan 2015
Location: Jamestown,NY
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I had my son design me one of those last semester when he wasn't too busy with school work. Came out pretty good, but he wants to tweak it a little.
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  #17  
Old 03-22-2017, 08:11 PM
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Steve Melton Steve Melton is offline
 
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Quote:
Originally Posted by Lynnb View Post
Are you going to try and smooth them any with an acetone wash or fuming? Any chance you want to share some files?

Lynn
no, they are smooth enough for me. yes, I'll drop the files out to a shared location when completed.
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Steve Melton
Cincinnati, OH
RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.
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  #18  
Old 03-24-2017, 07:08 AM
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Lynnb Lynnb is offline
 
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Quote:
Originally Posted by Steve Melton View Post
no, they are smooth enough for me. yes, I'll drop the files out to a shared location when completed.
Cool, thanks.

Lynn
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  #19  
Old 03-24-2017, 07:23 AM
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N941WR N941WR is offline
 
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Location: SC
Posts: 10,761
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Can you incorporate a small piece of screening material in it to keep the bugs out? (Mud daubers are a real pain in the South and will build a nest in any opening they can find.)

Quote:
Originally Posted by Steve Melton View Post
maybe a little proseal on the cylinder is enough to adhere. weight = 16 grams. first trial, size is not final. plastic cost = $ 0.42. may also improve the life of the o-ring since it will eliminate vortex shedding vibration of the stem that is in the airstream.



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  #20  
Old 03-25-2017, 09:03 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
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Bill, I attempted to make the fairing removable if needed for access or to clean out mud.... I used the same idea as the JD fairing because it's good, a set screw at the fwd edge.

JD fairing didn't seat fully because of paint. I've been flying with this for a year, no problems.


printed fairing, Eppler 863 airfoil, thickness increased from my first prototype made from memory, my memory wasn't very good. it's a solid fit. I like it. the ABS plastic will not scratch the paint.











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Steve Melton
Cincinnati, OH
RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.

Last edited by Steve Melton : 03-25-2017 at 09:12 PM.
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