Archive for December, 2011

# .

Posted by HuffDaddy | Dec 11, 2011 @ 05:24 PM | 16,917 Views
=online calcs and formulas=

V x @ = W

=formula to calculate rpms into projected speed=

-->per LICobra (thanks!)

The easy version is rpms X prop pitch X .000947 or

5800 (rpms) X 10 (pitch) X .000947 = 54.92 mph

B]=e-Calc=[/B]

http://www.ecalc.ch/motorcalc_e.htm?ecalc

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https://www.rcgroups.com/forums/show...ostcount=10199

Just an example....lets say your rpms were 8500

Take your rpm reading and times it by the pitch (8500 X 6 = 51000), then take 51000 and times it by .000947 (51000 X .000947= 48.2 mph)

Pitch speed is calculated to 48mph

After testing the stock motor/prop combo......the stock pitch speed came in at 55 mph.

=Scale Speed Calculator=
http://www.scriptasylum.com/rc_speed/scalespeed.html

=Understanding Scale Speed=
http://www.astroflight.com/pdfs/ScaleSpeed.pdf

= tools to calc numerous things =

-->per Papabatman (thanks!)

http://2bfly.com/tools/

-->per PittSpecial (thanks!)

http://brantuas.com/ezcalc/dma1.asp

Disorientation Phenomenon
http://www.airfieldmodels.com/inform...ntation_01.jpg

APC Propellers
http://www.apcprop.com/default.asp

Master Airscrew Propellers
http://masterairscrew.com/propellers.aspx

RCG Moderators

https://www.rcgroups.com/forums/showgroups.php?

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