VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-14
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-10-2016, 10:56 AM
SabreFlyr SabreFlyr is offline
 
Join Date: Sep 2015
Location: Marion, IN
Posts: 98
Default

Quote:
Originally Posted by Ron B. View Post
Any idea what was added for the extra weight from Van's #?
What did Van's -14 end up weighing empty. They don't have an empty weight on the spec page yet.
__________________
Ray Dosh
LJ45 driver
RV-14 QB #140212
VS done (by previous builder)
Rudder started
2017 DUES PAID
Marion, IN MZZ
Reply With Quote
  #12  
Old 01-10-2016, 12:24 PM
MLock MLock is offline
 
Join Date: Jan 2005
Location: Waldorf, Md.
Posts: 268
Default

I believe it was 1,232 lbs.
__________________
Mitchell Lock
President Van's Aircraft
Reply With Quote
  #13  
Old 01-10-2016, 01:57 PM
Ron B. Ron B. is online now
 
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,049
Default

Quote:
Originally Posted by SabreFlyr View Post
What did Van's -14 end up weighing empty. They don't have an empty weight on the spec page yet.
Yes they do , first link on the opening post.
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
Reply With Quote
  #14  
Old 01-10-2016, 02:37 PM
SabreFlyr SabreFlyr is offline
 
Join Date: Sep 2015
Location: Marion, IN
Posts: 98
Default

Quote:
Originally Posted by Ron B. View Post
Yes they do , first link on the opening post.
Not sure what you're referring to as the "opening post." I'm talking about this page:

http://vansaircraft.com/public/rv14specs.htm
__________________
Ray Dosh
LJ45 driver
RV-14 QB #140212
VS done (by previous builder)
Rudder started
2017 DUES PAID
Marion, IN MZZ
Reply With Quote
  #15  
Old 01-10-2016, 05:06 PM
SabreFlyr SabreFlyr is offline
 
Join Date: Sep 2015
Location: Marion, IN
Posts: 98
Default

Ahh, I missed the sample document. Just saw the quick reference charts.

Thanks!
__________________
Ray Dosh
LJ45 driver
RV-14 QB #140212
VS done (by previous builder)
Rudder started
2017 DUES PAID
Marion, IN MZZ
Reply With Quote
  #16  
Old 01-11-2016, 03:06 AM
control control is offline
 
Join Date: Feb 2006
Location: Stockholm, Sweden
Posts: 280
Default

If my 14 gets close to this, my wife an me can gain a lot of weight and still fly with full tanks and max luggage... not sure if that is a good thing
__________________
RV-14 kit #140138
working on the fuselage kit
wings done, tail kit almost done
Http://magnusrv.blogspot.se
Reply With Quote
  #17  
Old 01-11-2016, 08:05 AM
jswareiv jswareiv is offline
 
Join Date: Dec 2006
Location: New Orleans, LA
Posts: 448
Default Weight Gain

Quote:
Originally Posted by control View Post
If my 14 gets close to this, my wife an me can gain a lot of weight and still fly with full tanks and max luggage... not sure if that is a good thing
Yes, but not sure if you will be able to get in and out. I am telling my wife "we" need to lose some weight and get in shape to get in and out of the plane easily.
__________________
Stoney
First RV-14 Flight 04/17/2016
Serial #140087, N214SW
http://rvbuild214sw.com/
Dues paid to 2018.
Reply With Quote
  #18  
Old 01-11-2016, 08:33 PM
czechsix's Avatar
czechsix czechsix is offline
 
Join Date: Mar 2006
Location: Spring Hill, KS
Posts: 214
Default Interesting...

Quote:
Originally Posted by MLock View Post
Just weighed N914VA the other day. 1246 lbs. empty, w/o paint. Empty C.G came out at 81.38".

Will reweigh after paint next month.
Scott & Mitch, thanks for posting this info. A few comments/questions:

It's interesting that Mitch's -14A has a CG that is further aft (81.38) compared to the original prototype RV-14A (which came out at 80.61). I would have expected the opposite. Most significantly, Mitch's plane is unpainted...paint moves the CG aft, so an unpainted airplane should have a further forward CG. If the avionics in the panel area are heavier in Mitch's plane, that would move the CG slightly further forward. The G3X pitch servo is lighter than Dynon's, which would again move the CG forward. Something doesn't add up, unless the leather seats & bag compt upholstery weighs an extra 50 lbs or so. Is there anything else mounted in the aft fuselage on Mitch's plane (transponder, magnetometer, yaw damper servo)?

As a side note, the empty weight of the proto -14A on the https://www.vansaircraft.com/pdf/RV-..._SampleW&B.pdf worksheet doesn't equal the sum of the three wheel weights. 436 + 364 + 435 = 1235 lb (not 1239 as shown). I'm not trying to nitpick, just wondering if the discrepancy indicates any errors in the original data (which might explain the CG differences as well?).

The reason it matters is because if I use the data from the original -14A, I can put a Whirlwind prop on it and stay within aft CG with two average adults, full baggage, and minimum fuel. Using Mitch's numbers, I'll have to stick with the Hartzell otherwise I run out of aft CG unless I limit myself to less baggage or lighter than average pilot/passenger. And it'll only get worse after painting.

Thanks,
__________________
Mark Navratil
Spring Hill, KS
RV-8A N2D #80583 - built/flew/sold
RV-14A #140017 - wings complete, empacone in progress...
Reply With Quote
  #19  
Old 01-11-2016, 09:37 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 6,591
Default

Mark,
I agree with your assessment and can't explain the difference. It should be closer than the current data shows. The weight discrepancies (I will look into where the error got introduced) of N214VA are not enough to influence the C.G. position much at all.
N214VA has been weighed on digital calibrated scales a number of times in the past couple years. Each time there has been no surprise as to the result.

I am not sure what Mitch used for scales, whether the tanks were completely empty so that no compensation had to be done, etc...., but I would have expected N914VA to have been much closer to N214VA than it is. We will have to look into it, but my gut feeling at the moment is that there is possibly an error in the data for N914VA (it's C.G. is a small bit further aft than what the RV-14 tail dragger is).
So until further information is provided, consider the values for N214VA and N144VA to be the official examples.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #20  
Old 01-12-2016, 05:43 AM
kaber56 kaber56 is offline
 
Join Date: Nov 2012
Location: Fairview Park, OH
Posts: 21
Default

Are you using an IO-390 or IO-360 in your tabulation?
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 08:40 PM.


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.