Tommy Cookers wrote: ↑
Sun Apr 15, 2018 12:53 pm
you seem to imagine that a monocoque is structurally superior to a spaceframe - it is inferior
rather if allowed eg a decent height a spaceframe or similar will be lighter and stiffer for a given load than a monocoque
I suspect you haven't designed such things
only where dimensions (or cost) are constrained or where the structure is also a pressure vessel is the monocoque better
eg even the Vickers Viking was originally designed as a frame structure (covered in unusually strong fabric)
eg when did anyone give a metal aerobatic plane a monocoque structure ?
eg the Typhoon was designed to carry stuff and let the pilot see what he was doing and segregate him from the fuel
later planes were not better than Hurricanes for going faster by having (relative to weight) smaller wings - just different
ok the designers should have gone VP prop when other countries did, and used correspondingly smaller wings
ok the above is somewhat subject to material properties eg the unusual specific stiffness of CFC
but remember the distance records for human-powered flight are enabled by 'frame' ie externally-'braced' structures
via CFC 'booms' (compression members) and some kind of 'wires'
what you call a monocoque is better called a stressed-skin structure ie it has frames or other stiffening
eg Matra and Ferrari F1 etc cars had aircraft-type structures - better than monocoques but then banned by fuel tankage rules
NOTE regarding your repetition of the fashionable modern claim that the Tempest had a 'laminar-flow' wing ......
bloody source is 'the Typhoon & Tempest story' 1988 Thomas & Shores ISBN 1 85532 779 1 & Bentley's 1973 scale model bit
T&S seem to assume (without evidence) that as Hawker checked out NACA LF airfoils the Tempest must have been LF
NO !!! NO !!! NO !!! max thickness at 37.5% chord is not LF .......
as I say - how come there was no official mention/record of this LF ? - ever !
as I say - how come there was eg no comparison or reference to this LF in the official reports on the Spiteful LF ?
as I say - modern writers never let the facts get in the way of a good story !!
I flew maybe twice with a fairly lightweight Intermediate-category (aerobatic) competitor who was locally known for ......
installing 25 lb weights in the rear fuselage to move the CG to an unapproved position and .....
riveting the cockpit coaming (thin sheet metal) to the fuselage space frame for strength and .....
breaking inflight one of the upper longerons (lengthwise tubes of the spaceframe) and continuing flying, and ......
breaking in a later flight the second upper longeron (remarking that he heard a similar very loud bang previously)