VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #351  
Old 01-18-2018, 02:19 AM
rvmills's Avatar
rvmills rvmills is offline
 
Join Date: Nov 2007
Location: Reno, NV
Posts: 2,076
Default

And soon you'll be able to create a rating scale for aircraft based on how many of your cool fairings are installed. SPF 50 being much faster than SPF 25, eh!

Cheers,
Bob

Quote:
Originally Posted by Steve Melton View Post
I like it. SPF.
__________________
[size="1"]Bob Mills
RV-6 "Rocket Six" N49VM
Reno-Stead, NV (KRTS)
Sport Class Air Racing "Race 49"
SARL "Race 49"
West Coast Ravens FFI RV Formation Squadron
Reply With Quote
  #352  
Old 01-18-2018, 11:46 AM
TCONROY's Avatar
TCONROY TCONROY is offline
 
Join Date: Jul 2009
Location: Wilsonville, OR
Posts: 450
Default

JD Airparts makes a similar fairing for the fuel tank drain sump and fuel vents. This would be a great addition for the tie-downs.
__________________
________
Trevor Conroy CFII, MEI
Airbus Pilot
N781TD
RV-7
First Flight - April 12, 2015

Construction Log
Reply With Quote
  #353  
Old 01-18-2018, 04:39 PM
whodja whodja is offline
 
Join Date: Dec 2014
Location: Apex, NC
Posts: 5
Default Tie down cover

How about a cover with a spring loaded hinge in front of the tie down. Adhere to the wing surface with proseal.
Reply With Quote
  #354  
Old 01-19-2018, 07:04 PM
Steve Melton's Avatar
Steve Melton Steve Melton is online now
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,860
Default needs some work

clearly this one needs some work. it was easily removable with one hand in about 2 seconds. it positively locked to the eyebolt.









__________________
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 = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 01-19-2018 at 10:46 PM.
Reply With Quote
  #355  
Old 01-19-2018, 10:31 PM
Steve Melton's Avatar
Steve Melton Steve Melton is online now
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,860
Default concept 1 rev 2

optimized use of space. recessed eyebolt to actual condition to ensure positive contact of fairing to wing skin.

__________________
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 = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 01-19-2018 at 10:37 PM.
Reply With Quote
  #356  
Old 01-19-2018, 11:03 PM
rockwoodrv9 rockwoodrv9 is offline
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO
Posts: 2,461
Default

Steve, I saw a picture of one of the racers at Reno - can't remember who, that had cut plastic water bottles to cover the opening for the rudder hings.

I really like the flap hinge brackets and several of the other items you have come up with. I am going to have to spend some time and learn SW. You look like you are having too much fun!

The covers for the tie down hooks look like about as much trouble to take on and off as the bolts they cover. If you use a standard eye bolt edge first, does that disrupt the wind flow to need a fairing?

Thanks for all the postings on printing. It opens up so much more than CNC.
__________________
rockwoodrv9a
Meridian Idaho
rockwoodrv9a@gmail.com
O-320 D2A
Awaiting DAR Inspection
Reply With Quote
  #357  
Old 01-20-2018, 07:41 AM
Steve Melton's Avatar
Steve Melton Steve Melton is online now
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,860
Default

3D printing is an engineers dream. barriers are and will be broken down for the individual to build and create. kids are growing up with this technology. no telling what it will become. the technology has taken awhile to mature but it has passed the critical mass point and will move even faster now. the key is to learn to model while keeping the printing limitations in mind.

to reduce drag obviously the best solution is to completely remove the tie down eyebolt. I just don't like doing that and wanted another low drag solution. I probably use the tie down 10 percent of my flights. I don't have any calculated drag numbers and these small fairings will be hard to quantify during flight testing but I believe they are in the direction of goodness for reducing drag.

I am looking forward to getting back in the air today after all the snow and hopefully my oil leak from a top case bolt is solved.
__________________
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 = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 01-24-2018 at 08:28 PM.
Reply With Quote
  #358  
Old 01-20-2018, 10:59 AM
Steve Melton's Avatar
Steve Melton Steve Melton is online now
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,860
Default concept 2 rev 1

trying multiple ideas as suggested by a forum member.

__________________
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 = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com
Reply With Quote
  #359  
Old 01-20-2018, 04:29 PM
RV7A Flyer's Avatar
RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 1,715
Default

Quote:
Originally Posted by Steve Melton View Post
to reduce drag obviously the best solution is to completely remove the tie down eyebolt.
And then plug the hole where the tiedowns go
__________________
2019 Dues paid!
Reply With Quote
  #360  
Old 01-20-2018, 07:16 PM
Steve Melton's Avatar
Steve Melton Steve Melton is online now
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,860
Default whao!

I've never been faster. 141 kts at 20.5 MP, 2325 rpm at 2500 ft. low power setting. low clouds. this is about 6 kts faster than my normal speed. temp = 10C.

Flap bracket fairings with buttons and tie down fairings, both sides. Slipping thru the air. The tie down fairings worked perfectly, concept 1 rev 2. I plan to evaluate concept 2 in the future but I'm pleased so far.





slight play on the fairing is not a problem. the fairing is positively secure. fairing removal takes about a second with one hand. it can be installed and removed by feel, no need to look under. Note: the trailing rod does not need to be as long, I just whacked a rod. tie down fairing total weight = 19 grams.





the test platform
__________________
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 = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com

Last edited by Steve Melton : 01-21-2018 at 07:27 AM.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:59 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.