Rob,
I do not own a 320/360, but own a 235/320, so your questions also apply to that airframe. In the US, each builder sets their own gross weights as their particular aircraft is not a Lancair but it is whatever they want to name it since they are the builder/manufacturer. I know you are asking about weights over the factory information for landing, but I imagine few forum contributors would desire to give that information on a public media such as this forum.
From: Stevens Family
Sent: January 29, 2013 7:56 AM
To: lml@lancaironline.net
Subject: [LML] L360 lancing weight limit
I have a query harking back to the recent discussion on maximum weights that folks are using for their L320/360’s.
Following on from that thread, I am interested to know what landing weight limits folks are using for the LN360, especially those who are increasing take-off weights above the factory limits. With a take-off weight around 1900lbs, the published landing weight limit of 1685lbs requires a flight time of about 4 hours before you can land. That particularly becomes difficult here in Australia where the destination field requires an alternate, and there is no suitable alternate nearby (a common occurrence down here). That is, you require a lot of alternate fuel in the tanks over the destination because of the great distance to the alternate. This extra fuel often will put you over 1685lbs at the destination (unless of course you kick the wife out to accommodate the extra fuel!).
Does anyone know what is the structural or performance factor that most limits landing weight? Is there anyone out there who has landed above the factory limit on a regular basis, and if so, by how much, and has this created any problems?
As always, I appreciate the help that I get whenever I put a query on the list.
Regards,
Rob Stevens
Perth,
Western Australia.