VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 08-09-2021, 05:36 PM
Maxrate Maxrate is offline
 
Join Date: Dec 2008
Location: League city, TX
Posts: 622
Default Best scales on a budget

Looking for input on a set of good scales to weigh a -7 that won’t break the bank. New aircraft scale prices are all over the map.
Thanks.
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike

2021 Donation gladly paid..
Reply With Quote
  #2  
Old 08-09-2021, 05:45 PM
rjcthree's Avatar
rjcthree rjcthree is offline
 
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 1,024
Default Used race car scales. Check your local SCCA chapter website.

Used race car scales work well. Somebody will have them.
__________________
Rick
RV-9A N183RC/90432: tip-up, O320H2, Ellison, Dynon D180, CPi2, Sen GA, at KLPR
RV-8 83718, wing kit, tanks done, with a four year plus plan - on hold due to home move
2011-2021 VAF contributor
Reply With Quote
  #3  
Old 08-09-2021, 06:53 PM
DRMA DRMA is offline
 
Join Date: Jan 2016
Location: Sugar Land, TX
Posts: 526
Default

Or check with your local EAA chapter. Many have scales for the use of their members, and membership dues are low.

I weighed mine with the EAA 302 chapter (Conroe, TX) scales. They do charge a small fee for use that covers the annual re-calibration of the scales.

Cheers,
__________________
Dave Macdonald

RV-10 First Flight April 1, 2020. Phase 1 Complete
2022 VAF Dues Paid (plus a little more as the site is worth it.)
Reply With Quote
  #4  
Old 08-09-2021, 07:29 PM
GalinHdz's Avatar
GalinHdz GalinHdz is offline
 
Join Date: Mar 2010
Location: KSGJ / TJBQ
Posts: 2,327
Default

FWIW I use these 300Kg (660lb) Digital Postal Scales which work great. My airplane's BEW is less than 660lbs per tire so these are more than adequate.

__________________
Galin
CP-ASEL-AMEL-IR
FCC Radiotelephone (PG) with Radar Endorsement
2022 Donation made
www.PuertoRicoFlyer.com
Reply With Quote
  #5  
Old 08-09-2021, 08:59 PM
Doug Rohrer Doug Rohrer is offline
 
Join Date: May 2009
Location: Bowling Green, KY
Posts: 379
Default +1

I bought the same scales as Galin and they worked fine for my -9A. Cheap enough on Amazon you can buy a set of three and loan them out to your RV buddies. Weight limit is too low for C172's.
__________________
Doug Rohrer
Bowling Green, KY
Flying RV-9A
Building RV-14A
Reply With Quote
  #6  
Old 08-10-2021, 04:22 AM
swjohnsey swjohnsey is offline
 
Join Date: Nov 2018
Location: Kingsville, TX
Posts: 455
Default

I have a pair of those as well plus a smaller electronic scale for the tail wheel.
Reply With Quote
  #7  
Old 08-10-2021, 04:43 AM
erich weaver's Avatar
erich weaver erich weaver is offline
 
Join Date: Aug 2006
Location: santa barbara, CA
Posts: 1,792
Default

Consider renting the scales from your local industrial supply store if you want to save the $ and not have equipment that rarely gets used lying around the hangar.

Erich
Reply With Quote
  #8  
Old 08-10-2021, 05:01 AM
Ed_Wischmeyer's Avatar
Ed_Wischmeyer Ed_Wischmeyer is offline
 
Join Date: May 2005
Location: Savannah, GA
Posts: 1,630
Default

I wonder (but haven't done the math) how much accuracy is really required. If each of the scales is accurate to say within three pounds, and in the unlikely event that all the errors are in the same direction, is a nine pound error tolerable? (I don't know the specs for "certified" aircraft scales.) Also, at one point, factory built airplanes were not all weighed when they were built, but only every tenth airplane or so... Gross weight is important, but keeping the c.g. from going too far aft is really important...
__________________
RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
ATP CFII PhD, so I have no excuses when I screw up
Vaccines kept me out of the hospital but COVID still cost me a month of living, all told...
Reply With Quote
  #9  
Old 08-10-2021, 05:10 AM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,857
Default

Quote:
Originally Posted by Ed_Wischmeyer View Post
I wonder (but haven't done the math) how much accuracy is really required. If each of the scales is accurate to say within three pounds, and in the unlikely event that all the errors are in the same direction, is a nine pound error tolerable? (I don't know the specs for "certified" aircraft scales.) Also, at one point, factory built airplanes were not all weighed when they were built, but only every tenth airplane or so... Gross weight is important, but keeping the c.g. from going too far aft is really important...
A three pound error in the accuracy of the weight on the tailwheel would have a serious impact on the CG calculations. Depending on the direction of the error, it might reduce your (theoretical) baggage allowance by 15+ lbs or it might fool you into flying with the CG aft of limits.
__________________
Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10

Last edited by Kyle Boatright : 08-10-2021 at 05:18 AM.
Reply With Quote
  #10  
Old 08-10-2021, 06:05 AM
riseric's Avatar
riseric riseric is offline
 
Join Date: Oct 2011
Location: Québec, CNV9
Posts: 539
Default

The scales suggested by Galin are accurate to 0.2 pounds each at the 660lbs setting. That's 0.03%.

Anyone know how accurate are aircraft scales???
__________________
Eric,
2022 =VAF= paid
RV-8 SB #83274
Grove Airfoiled Gear, Wheels & Brakes
VPX-Pro, EFII System 32, EarthX batteries
Aerosport IO-375, MTV-9-B/183
Skyview HDX
C-GEMQ, RV-8, "Dragonfly", flying
C-GNFJ, C72R Cutlass, flying
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 10:54 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.