Elect. prop charts - RC Groups
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Feb 28, 2008, 06:45 AM
Real Time Recon
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Elect. prop charts

Ive been looking & looking & cant find a prop chart.What i want to know is what the "letters" mean.THANKS.
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Feb 28, 2008, 06:58 AM
Real Time Recon
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Examples..... APC, E ,SF GWS SF etc,etc.etc.
Feb 28, 2008, 07:47 AM
Registered User
APC is the name of a company http://www.apcprop.com/
"E" may mean Electric prop (depends on context), but usually can run at least 9-12000 rpm range or so (not a hard limit),
"SF" is a slow flyer Electric prop, meaning shouldn't go much above the 5-6000 rpm range (maybe a little higher, but I don't use SF props so am not positive)
GWS is another company,

so when you see APC 6-4E for example, it is a propeller made by APC for electric use ONLY, and I assume you know what the 6-4, but just in case, it is 6 inches (nominal 15cm) in diameter, and 4 inches (nominal 10cm) in pitch.
Feb 28, 2008, 08:07 AM
Registered User
vintage1's Avatar
APC a company name
GWS a company name

Other names are MA = master airscrew and Gunther (one type of cheap prop)

APC make 'E' (electric thin blade) and SF (SloFly) props. The slowfly are optimised for lower RPM use. They are restricted to 65,000 RPM divided by the diameter in inches. They draw more current and give more thrust than the 'E' range when the RPM is low, but they are more fragile.

The E range props can do nearly three times that - 150,000 RPM divided by diameter in inches.

GWS makes two sorts of style of props - the 'HyperDrive' or HD props which are suitable for medium RPM and are not at all bad, and pretty cheap, and their slofly range, whih is even MORE fragile than the APC. I think these are also called RS props for reasons I forget.

Other props you may come across are Graupner CAM props. Again I forget what the CAM stands for, but they are broadly similar to APC 'E' props.
Feb 28, 2008, 12:11 PM
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Dr Kiwi's Avatar
APC is Advanced Precision Composites, but the company is actually Landing Products based in Woodland, CA.

I think CAM with the Graupner props is Computer Aided Manufacture... but I could be wrong. [ah...from Hobby-Lobby... "Manufacturing"]

GWS is, of course, Grand Wing Servo. Their RS stands for Reduction Series.
Feb 28, 2008, 01:20 PM
Registered User
I am equally mystified by the proliferation of alphabet soup of letter suffixes and prefixes on propellers (as well as other items). When looking at motor/propeller performance charts I am unsure which suffix is similar or equivalent to folding propellers since these don't appear to be used in such tests.

I posed the same question to one of the prop manufacturers customer service (not) websites and got no response.

Feb 29, 2008, 09:14 AM
Registered User
BlazerB52's Avatar
Sometimes props will have numbers that indicate size in inches an in mm.

example: on some props you might see 1060 is a 10 x 6 prop or 1065 would be a 10 x 6.5

4 x 4 prop might only have mm on the blades say for example: 102 x 102

Hope this helps.

Also on GWS props HD stands for hyper drive correct me if I am wrong guy's


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