Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fi

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> RV6-List
View previous topic :: View next topic  
Author Message
gyoung



Joined: 09 Jan 2006
Posts: 209
Location: Republic of Texas

PostPosted: Mon Jan 06, 2014 9:46 pm    Post subject: MTOW of RV-6 with Lycoming O-320-D3G and 79" Sensenich Fi Reply with quote

Observation, personal experience and engineering judgment - my opinion only, not from calculation. The wing spar and attachment to the fuselage differ. The -6 spar is multiple layers of bar stock with the two wings joined at the center with 4, 1/4" steel splice plates. That makes it effectively a one piece wing with the -605 bulkhead bolted to it all the way across the width. I think it's 74 bolts. The -7 uses the -8 style spar with stubs that mount into boxes in the fuselage using 4, albeit large, bolts in each. I have experienced trying to wrap the -6 spar around a tree and believe the center section will not bend under any load my body can withstand. The -8, and I assume -7, has a hole outboard for the aileron push rod. I believe it got beefed up after the -8 demo plane loss but again it is different from the -6. The firewall structure of the -7 has only one diagonal on each side instead of the "X" braces on the -6. The rest of the fuselage and tail are effectively the same other than for differences going to matched hole CAD parts.

Perhaps using "weaker" was a poor choice of words. Is the -7 structure adequate? Yes. Does the -6 structure provide more margin? IMHO, yes. If 1800 lbs GW is OK for the -7, should it be OK for the -6. Again, IMHO, yes. FWIW I set my -6 GW at 1900 lbs so I'd always be legal as long as I felt I was operating safely.

Regards,
Greg

--


- The Matronics RV6-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV6-List
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> RV6-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group