Techniques:

1. Daum's Muffler calculations

2. Reimholz C. G. spreadsheet

3. Peninsula Aeromodelers logo decals

4. FAA view of model aircraft: Advisory Circular AC 01-57 1981

5. FAA regarding Unoccupied Aerospace Vehicles

6. eCalculators

bulletD-calc (freeware) http://www.yahoogroups.com/group/D-calc
bulletMM_calc, English, Louis Fourdan (freeware) http://electrofly.free.fr/file/MM_Calc_v126.zip

Criticism and suggestions: http://www.rcgroups.com/forums/showthread.php?t=583327

bulletMotocalc http://www.motocalc.com
bulletElektro-Antrieb http://www.geck-elektroantrieb.de
bulletP-calc (freeware) http://brantuas.com/ezcalc/dma1.asp
bulletE-Calc http://www.slkelectronics.com/ecalc/index.htm
bulletMumtats (freeware)  http://www.aero-nuts.com
bulletRod Badcock's calculators (freeware) http://www.badcock.net
bulletPeak efficiency (freeware) http://www.peakeff.com