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  #1  
Old 01-15-2011, 03:49 PM
float208 float208 is offline
 
Join Date: Mar 2005
Location: Chandler, Arizona
Posts: 188
Default Weight and Balance numbers??? RV-7

Would any of you RV-7 Drivers be willing to share what your aircraft weight is and who much of that is on the tailwheel, and last what kind of prop do you have... I am working on the weight and Balance and am finding the plane to be extreamly tail heavy 93# to be exact... This puts me way out on the CG.... in all but solo light on gas situations....

Thanks
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  #2  
Old 01-15-2011, 04:11 PM
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Jim P Jim P is offline
 
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Posts: 934
Default -7 Tail Weight

I ended up at 1128, 69.25 on the tail with the Hartzel BA c/s prop/ and an AeroSport XP-360 injected.

What did you get for your mains?
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Last edited by Jim P : 01-15-2011 at 04:26 PM.
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  #3  
Old 01-15-2011, 04:17 PM
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DakotaHawk DakotaHawk is offline
 
Join Date: Oct 2008
Location: Arlington, WA
Posts: 799
Default RV-7 W&B info

Here's my data...

Rt Main 483# @ 68.5"
Lt Main 501# @ 68.5"
TW 70# @ 248"

Empty Wt 1054
CG = 80.45

This is with an IO 360 with Hartzell C/S prop.
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RV-7 N957RV (First Flight on Dec 18, 2009)
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#6563 on Van's generic hobbs
Arlington, WA
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  #4  
Old 01-15-2011, 04:24 PM
float208 float208 is offline
 
Join Date: Mar 2005
Location: Chandler, Arizona
Posts: 188
Default Weight

My Empty is 1130#. 93# on the tail, and about 518# on each main. I have a Whirlwind Prop which is light, but the Battery is on the firewall and eveything else is in normal locations, nothing but 1 small strobe powerpack in the tail. I cannot figure out why the tail is so heavy. My -8 was only 55# on the tail This is strange... If I add the wieght of a Hartzell on the front the tail still weighs 87# so a prop swap isn't going to do the trick either.
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  #5  
Old 01-15-2011, 04:28 PM
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hydroguy2 hydroguy2 is offline
 
Join Date: Sep 2006
Location: Townsend, Montana
Posts: 3,179
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Painted RV-7 w/ pants and fairings, IO-360, WW200RV prop w/2.25 spacer, James long cowl, plenum, seats and front carpet, light duty panel. ELT and Strobe pak behind Pax seat. oversize main tires(+5#)



Certified aviation scales.

right main 511# at 68.5"
left main 514# at 68.6"
tail wheel 70#

Total 1095# @ 80.2"c.g.
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  #6  
Old 01-15-2011, 04:32 PM
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hydroguy2 hydroguy2 is offline
 
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did you level everything? calibrated/certified scales?
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  #7  
Old 01-15-2011, 04:34 PM
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Brantel Brantel is offline
 
Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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RV7, O-360 ND with Hollow Crank, Dual Mags and Carb. Metal FP Sensenich Prop, battery on firewall, Minimal Flightline Interior, Dual Dynon EFIS/EMS, VFR only radio/GPS gear. Bell TW Fork, rest all Van's. No paint...

484 lbs right main
476.5 lbs left main
71 lbs TW

1031.5 total

80.89" empty CG (full of oil)



RV7's tend to be tail heavy (well not tail heavy but not on the fwd limit) empty. Wait till you see what this is going to do to your baggage limit! (Remember to run the numbers at minimal fuel)
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Last edited by Brantel : 01-15-2011 at 04:41 PM.
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  #8  
Old 01-15-2011, 04:47 PM
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DakotaHawk DakotaHawk is offline
 
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Location: Arlington, WA
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Float208, are you leveling the plane prior to weighing it? The longerons at the cockpit must be level (fore - aft and side - side) prior to weighing anything.

If you're weighing the TW with the tail still on the ground, you're going to get a heavy weight! See Hydroguy's photo to see how the plane should look when you're weighing it. (You probably already know all of this, but someone else reading this thread may not know it yet...)
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RV-7 N957RV (First Flight on Dec 18, 2009)
RV-14 N144P (Empennage complete, wings almost complete, fuselage almost complete)
#866 on the Van's RV-7 hobbs
#6563 on Van's generic hobbs
Arlington, WA
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  #9  
Old 01-15-2011, 04:58 PM
float208 float208 is offline
 
Join Date: Mar 2005
Location: Chandler, Arizona
Posts: 188
Default weight..

Weighed it level, just like in the photo. Just pulled the tail fairing off looking for hidden weights... nothing....
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  #10  
Old 01-15-2011, 05:15 PM
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Kevin Horton Kevin Horton is offline
 
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Location: Ottawa, Canada
Posts: 2,357
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Was the canopy closed?
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