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|Scratch and Kit Built Aircraft Discuss and share your scratch built or kit built aircraft as well as building techniques, methods, mediums and resources.|
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|10-07-2013, 12:11 PM||#1|
Join Date: Oct 2010
Location: Ex UK Brit now in Latvia west coast - Ventspils
Thanked 187 Times in 184 Posts
Club: Ex Waltham Chase and Meon Valley Soaring. May start "RC Latvija Club"
Scratchbuild ratios ...
I drew out on the foam sheet the outline of the model and all looked fine. I reckon the old adage ' If it looks right ... it likely is right ' is quite true. But in this case once pieced together - the stabs were far too small and elevators way out of relation to overall.
So what I'm looking for is not formulae ... but ratios that would work for various styles of craft ...
If we split the types to :
General trainer high-wingers - the Easystar / Yamamoto style
General sport straight / limited taper wings - Cessna, Piper, etc. style
Conventional wing / tail intermediates / performance - incl. biplanes,
High speed swept wing / conventional wing / tail
Modern swept wing jets - F15, F18, F16 sort of stuff
Early jets - Mig15, Panther etc.
Examples : The ratio of distance wing to tail ... size of tail feathers to wing ... size of elevators .... length of nose ... length overall vs wingspan .... wing chord... taper of wing / tail .... width of fuselage .... general rule of thumb to produce a basic foundation that new guys coming into scratchbuild can use to bring their first scratchbuilds ...
I am not talking aeronautical / physics degree stuff ... this is a hobby and simple relations is enough ...
An example of the model with the quotes would be excellent so it can be graded as to what class it sits in and more relevant for people needing to start scratchbuilding.
I'm sorry that I cannot quote figures to get it started now ... I'm sitting 10mls offshore at present !!
222kph PKJ,Mig3,64+50mm T45,HK PKJ twin,ME109,HK Edge540,Cessna182,Skymaster Biplane,F15,70mm F16 EDF,Ultimate Biplane,SE5, Qbee10,450 Heli, Founder 9x forum: http://groups.yahoo.com/group/Flysky_RC_radio/
- Subscribe to my Youtube: "solentlifeuk"
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