JL, BH......
touchdown geometry for the B744 is shown in TBC's FCTM.
Unfortunately the values are based on rigid geometry for various cases of oleo extension/roll/pitch. Wing behavior and resultant engine pod relative movement is a result of dynamic interactions of oleo rebound, spoiler, aileron input and attitude, with both feedforward and feedback. I wrote an inhouse paper based on a (limited) FEA analysis of wing behavior and it indicated pod touch was possible outside of the margins provided by the manufacturer by up to roughly 1.5 degrees.
BTW, the certification criteria encompassed by CFR14 part 25.473 and methodologically expanded by the applicable AC's/TSO's & orders such as:
AC 25-7A Flight Test Guide for Certification of Transport Category
Airplanes
AC No. 25.723-1SHOCK ABSORPTION TESTS Date: 5/25/01
」 25.125 Landing
AC 25.735-1 4/10/02 2
」 25.301 Loads
」 25.303 Factor of safety
」 25.733 Tires
」 25.1501 General: Systems and equipment limitations (JAR25x1524)
」 21.101 Designation of applicable regulations
」 25.943 Negative acceleration (JAR 25x1315)
AC 25.1309-1A System Design and Analysis
TSO-C26c Aircraft Wheels and Wheel-Brake Assemblies with
Addendum I
TSO-C135 Transport Airplane Wheel and Wheel and Brake Assemblies
TSO-C62d Tires
Order 8110.4A Type Certification Process
Order 8110.8 Engineering Flight Test Guide For Transport Category Airplanes
don't account for isolated wheel loads. To consider the consequences of that look at the Mega Death 2 deal at HK-CLK (not just the deteriorating ROD[18-20FPS @ TD, enough to exceed limit and result in deformation] but the roll instability, resulting in RHW touch and catastrophic overload of the RH MLG aft bearing mount), and some sundry other deals (EWK MD11 report, P40...).
may be worthwhile being gentle with bank...or be as perfect as 411A.
did the VS guys do good? no one here is likely to know without the DFDR/QAR data, but they don't have to be incompetent to have a bad day, just like the rest of us. The eye witness report appears to be of a good operation, which is what the rest of the world generally expects, yet purveyors of the PPrune forum appear satisfied to besmirtch at the least opportunity.
cheers
