VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #1  
Old 03-31-2017, 11:28 AM
Berchmans Berchmans is offline
 
Join Date: Nov 2009
Location: Anchorage, Alaska
Posts: 373
Default Second Seatbelt for Aerobatics

What have people done out there for installation of a second seatbelt for aerobatics that pass the IAC requirements of a separate attachment point?
__________________
Burke Wick
Flying RV 8
Anchorage, Alaska
VAF Dues Paid for 2017
Reply With Quote
  #2  
Old 03-31-2017, 11:42 AM
sandifer sandifer is offline
 
Join Date: Jan 2007
Location: NC
Posts: 601
Default

Not required for flying in Primary or Sportsman, which is most likely where you'd be with the RV. IAC rule below.

2.3(k) Dual seat belts with separate attach points and a shoulder harness are mandatory for Advanced and Unlimited (power and glider) categories. The same equipment is strongly recommended for Primary, Sportsman, and Intermediate power categories, but is not mandatory except when IAC Technical Monitors deem them necessary for the sequence being flown in these categories.
Reply With Quote
  #3  
Old 03-31-2017, 01:39 PM
WillyEyeBall's Avatar
WillyEyeBall WillyEyeBall is offline
 
Join Date: Jan 2007
Location: Daleville, AL
Posts: 276
Default Ron has one

Ron Schreck has dual lap belts in his (I think) and can describe and take pictures. I have dual in my RV4 and attached with screws under the seat and floor. As Eric said, unless you like self induced punishment, not necessary, but I like to feel pinned in the seat.
Bill Mclean (willyeyeball)
Reply With Quote
  #4  
Old 03-31-2017, 10:09 PM
jpowell13 jpowell13 is offline
 
Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 496
Arrow Novice Idea

I've been thinking about this for my 6A. It may be a dumb idea, and I won't be offended if experienced aerobats say so, but what would be wrong with taking an automobile lap belt and attaching it to my manual flap control rod behind the pilot's seat (one end on each side of the seat) with climber's carabiners for a backup lap belt? Wouldn't this arrangement be strong enough to hold the pilot in his seat in case the harness was accidentally unlatched during or before inverted maneuvers?

Alternately, the carabiners could be hooked into eyebolts installed in my baggage area floor. My thinking is that the extra lap belt is not for crashes but to hold the pilot in his seat if the harness comes undone during negative g's and, as such, the attach points do not need to be as strong as with the harness. (My weight at the -3g limit would be about 600lb.) Also, I would like to remove the second belt for non-aerobatic flights. John

Last edited by jpowell13 : 03-31-2017 at 11:28 PM.
Reply With Quote
  #5  
Old 04-01-2017, 02:23 AM
Marabou Marabou is offline
 
Join Date: Oct 2012
Location: Moscow
Posts: 10
Default

I use flap control rod in my 7a. No carabiners just thick rope just in case if main harness fails. Of course this "scientific" method has nothing to do with IAS requirements but I hope it should work. I did not test it because it is easy to bend flap rod but it should work as a lifesaving future once then you have to replace it. Like airbag. Is it appropriate to ask Vanís what they think about flap rod?
__________________
Ruslan Bord
RV-7a flying, RV-14a very slowly building
Reply With Quote
  #6  
Old 04-01-2017, 06:51 AM
ronschreck's Avatar
ronschreck ronschreck is offline
 
Join Date: Mar 2006
Location: Gold Hill Airpark (NC25), NC
Posts: 1,144
Default

The second belt is not so much a back-up in the event of a primary belt failure, but is usually a ratcheting belt that can be tightened enough to restrict pilot movement especially during inverted flight. I have found that I can better concentrate on flying aerobatic figures when I am firmly attached to the airplane and not bothered with the effort to keep my head off the canopy.

I secure my ratcheting belt to aircraft structure with pip pins for easy removal when not required.
__________________
Ron Schreck
IAC Director and Regional Judge
RV-8, "Miss Izzy", 2100+ RV Hours
Track Me
VAF 2017 Donor
"He who demands everything that his aircraft can give him is a pilot; he that demands one iota more is a fool."
Reply With Quote
  #7  
Old 04-01-2017, 10:22 PM
jpowell13 jpowell13 is offline
 
Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 496
Default

I see what you mean Ron. Does the second belt go down a little lower toward the legs than the primary belt to prevent you from lifting out of the seat better?
John
Reply With Quote
  #8  
Old 04-01-2017, 11:32 PM
SuperCubDriver SuperCubDriver is offline
 
Join Date: Feb 2011
Location: Germany
Posts: 271
Default

I was more concerned of opening/unlocking the main belt inadvertendly so I installed like a receptacle for a second lap belt. The belt is installed in only 10 seconds and removed as quickly. When not used as a lap belt it serves as a baggage holddown. The belt is from Aircraft-Spruce like 13-00301.
I used the same attachment point and used AN-3 bolts (loaded in single shear).
The other AN3 bolt is clamping an aluminum tube between the arms so that the belt hardware slides in easily.



__________________
RV-7 flying, IO-375 w. P-Mags, 200RV Prop

RV-8, IO-375, P-Mags, 74RV Prop, flight testing

Last edited by SuperCubDriver : 04-01-2017 at 11:44 PM. Reason: second pic
Reply With Quote
  #9  
Old 04-02-2017, 05:32 AM
ronschreck's Avatar
ronschreck ronschreck is offline
 
Join Date: Mar 2006
Location: Gold Hill Airpark (NC25), NC
Posts: 1,144
Default

Quote:
Originally Posted by jpowell13 View Post
I see what you mean Ron. Does the second belt go down a little lower toward the legs than the primary belt to prevent you from lifting out of the seat better?
John
Yes. That's the preferred location.
__________________
Ron Schreck
IAC Director and Regional Judge
RV-8, "Miss Izzy", 2100+ RV Hours
Track Me
VAF 2017 Donor
"He who demands everything that his aircraft can give him is a pilot; he that demands one iota more is a fool."
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 07:38 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.