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  #291  
Old 12-24-2017, 04:09 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,513
Default 3 deg downwards trim and buttons

proto4 installed.



















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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 12-24-2017 at 04:45 PM.
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  #292  
Old 12-24-2017, 04:35 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
Posts: 3,513
Default model

no wasted space

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 12-24-2017 at 04:49 PM.
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  #293  
Old 12-25-2017, 11:21 AM
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db1yg db1yg is offline
 
Join Date: Mar 2006
Posts: 644
Default Fairings

Hey Steve,

Looking good -- can't wait to see your test results!!

Cheers,

db
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RV9a/ECiIO360/James Cowl/WW RV200 Prop
Flying since 3/06 and still smiling!!!
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  #294  
Old 12-25-2017, 11:35 AM
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Bill Boyd Bill Boyd is offline
 
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Location: Landing field "12VA"
Posts: 1,708
Default

Looking good, Steve! I hope those aileron hinges are next. Thanks for sharing the R&D process with us.
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Bill Boyd

Hop-Along Aerodrome (12VA)
RV-6A - N30YD - Built '98 / sold '20
RV-10 - N130YD - 50 hours +
65 years running stock DNA
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  #295  
Old 12-27-2017, 01:19 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
Posts: 3,513
Default looking forward to proto4 install

I am getting close to buttoning up this project.





close up view as printed no surface clean up. increased the print resolution on the button faces. for flat surfaces, I prefer a file to sandpaper for clean-up. I think ABS plastic would make good whittling material.

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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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  #296  
Old 12-28-2017, 10:16 AM
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Snowflake Snowflake is offline
 
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Location: Sidney, BC, Canada
Posts: 4,278
Default

Have you tried an acetone vapour bath? That would clean those ABS parts up quite nicely regardless of filing/sanding/etc. marks.
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #297  
Old 12-28-2017, 10:54 AM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
Posts: 3,513
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I tried it once but didn't much care for the smell. I perfer to file the nibs and use a little sandpaper. The airflow surfaces are smooth enough and the basic shape is what smooths the flow.
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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  #298  
Old 12-29-2017, 09:01 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
Posts: 3,513
Default large spool base

getting some wiggle from the large spool side mount, 11 lb spool. decided to base mount large spool. a quick job. make a quarter of the part then mirror to make a half then mirror again to make full.

printed part weight = 1.1 lb. material cost = $12.36








deflection analysis

4X the vertical loading, 44 lb
1 lb side loading

boundary condition


X displacement, deflection outboard = .14 inch with 1 lb load forcing top open


stress, negligible



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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 12-30-2017 at 01:43 PM.
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  #299  
Old 12-29-2017, 09:10 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,513
Default button are handed

decided to go for green buttons for the right hand side so not to be confused for the left hand side, small parts.





ready for flight test, maybe get an extra knot with everything buttoned up? appreciate the push to get the buttons in there. it cleans it up.



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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com

Last edited by Steve Melton : 12-29-2017 at 09:48 PM.
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  #300  
Old 12-30-2017, 11:47 AM
JKintzle JKintzle is offline
 
Join Date: Dec 2012
Location: Lees Summit, MO
Posts: 14
Default

Steve,
Beautiful work and green buttons for the right side are a nice touch (red on the left side?).

Question I had is how you're permanently attaching the gray plastic rear piece to the flap hinge? I see it is currently attached with what looks like painters tape.
Great job!
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RV-9A. N43KK
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