DaveyP Posted May 20, 2017 Share Posted May 20, 2017 Just a guess but that's probably in centimetres so in inches 24 x 16. Quote Link to comment Share on other sites More sharing options...
Den Moran Posted May 20, 2017 Share Posted May 20, 2017 HI - THESE SEEM TO BE QUITE SMALL PROPS THAT i'M LOOKING AT Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted May 20, 2017 Share Posted May 20, 2017 They are in mm Den, as you suspect . Quote Link to comment Share on other sites More sharing options...
DaveyP Posted May 20, 2017 Share Posted May 20, 2017 Ok, 2.4" x 1.6"................................ Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted May 20, 2017 Share Posted May 20, 2017 Hi Den, IMHO, the '6040' just refers to 6" x 4" or 15,24 by 10,16 centimeters. First figure - 6" - should be the diameter and the second - 4" - is the pitch of the airscrew, ie. the distance covered by turning it 1 revolution. For a 3 or 5 blade prop, the diameter is obtained by multiplying the radius of one blade by 2. ... but I guess some experts will pop in soon. Cheers Chris Edited By McG 6969 on 20/05/2017 09:52:44 Quote Link to comment Share on other sites More sharing options...
DaveyP Posted May 20, 2017 Share Posted May 20, 2017 Oh dear, now I'm proper confused........... Quote Link to comment Share on other sites More sharing options...
kc Posted May 20, 2017 Share Posted May 20, 2017 If you start looking for props on HobbyKing the first page says '6inch props , 7inch props ' etc so you know that it's inches then on that 6inch section some are described as 6040 etc so that's inches. Make sure you look at the UK site to avoid import charges. Quote Link to comment Share on other sites More sharing options...
Den Moran Posted May 21, 2017 Share Posted May 21, 2017 Thanks for that,everyone - I think that Denis's may be the correct one, but the confusion created by Hobbyking is obvious to see - one of the modern phenomena - if its not broken, fix it! Thanks again everyone, Den Quote Link to comment Share on other sites More sharing options...
Den Moran Posted May 24, 2017 Share Posted May 24, 2017 Hi, everyone! From the horses' mouth: ' Hi Den, a 6040 prop means 6 inch diameter with 4 degrees pitch effectively a 6x4 prop. A 5045 is 5 inch diameter 4.5 degrees pitch or 5x4.5. Hope this helps. Kind regards, Tom H HobbyKing Support Team ' So thanks to all, once again, Den, Swansea Quote Link to comment Share on other sites More sharing options...
brokenenglish Posted May 24, 2017 Share Posted May 24, 2017 Posted by Den Moran on 24/05/2017 06:08:37: Hi, everyone! From the horses' mouth: ' Hi Den, a 6040 prop means 6 inch diameter with 4 degrees pitch effectively a 6x4 prop. A 5045 is 5 inch diameter 4.5 degrees pitch or 5x4.5. Hope this helps. Kind regards, Tom H HobbyKing Support Team ' So thanks to all, once again, Den, Swansea That's amazing! I think maybe the guy at HK doesn't understand! Surely the "4" pitch means 4 inches, i.e. the electric equivalent of an old 6x4 prop... Can you imagine 4° of pitch? Look at 4° on a protractor!!! Astronomical rpm would give very little forward motion!!! Quote Link to comment Share on other sites More sharing options...
Dickw Posted May 24, 2017 Share Posted May 24, 2017 He does mean 4 inches and not 4 degrees. A 6040 is a normal 6x4 etc. Dick Edited By Dickw on 24/05/2017 12:54:40 Quote Link to comment Share on other sites More sharing options...
Chris Walby Posted May 24, 2017 Share Posted May 24, 2017 Okay cat out of the bag 6040 means 6 inch diameter and 4 inch pitch The reason for the zero.... so what is you have a 6045...well that will be 6 inch dia and 4 1/2 pitch Hope that clears things up ! Worth a look at the APC web site, things get fun with 3 blade pusher props!, but once you have the hang of its not too bad....now if I could only work out the difference in a wide, narrow and standard width regarding efficiency Edited By Chris Walby on 24/05/2017 13:27:11 Quote Link to comment Share on other sites More sharing options...
Dickw Posted May 24, 2017 Share Posted May 24, 2017 Seems a reasonable approach at first glance, but once you get beyond a 9,9 x 9.9 the extra numbers could get a bit unwieldy. Anyone for a 185220? Dick Quote Link to comment Share on other sites More sharing options...
Den Moran Posted May 25, 2017 Share Posted May 25, 2017 AAAAAAAAAAAAAAAAAAAARRRRRRRRRRRRRGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHH! - As the great Spike used to say when his swonicles were playing up! Quote Link to comment Share on other sites More sharing options...
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