Richie P Posted March 24, 2015 Share Posted March 24, 2015 can anyone tell me the difference between electric and pattern props, i have a 11x12 apc pattern prop can i use this on an electric model cheers richie Quote Link to comment Share on other sites More sharing options...
cymaz Posted March 24, 2015 Share Posted March 24, 2015 Never had an electric prop but they do look a bit thinner around the hub. I would think the profile is different....wouldn't know why though ! Quote Link to comment Share on other sites More sharing options...
flight1 Posted March 24, 2015 Share Posted March 24, 2015 You can use any prop as long as the load on the motor is with in spec. The main difference is that a electric prop will be lighter and less strong as it dos't have to cope with the vibrations etc from a combustion engine. Quote Link to comment Share on other sites More sharing options...
Richie P Posted March 24, 2015 Author Share Posted March 24, 2015 so what is a pattern prop used for Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 24, 2015 Share Posted March 24, 2015 To pull a model through the air? Or more helpfully, I've always assumed that it's a propeller optimised for pattern flying models which would give good braking effect on downlines. Edited By Martin Harris on 24/03/2015 19:07:43 Quote Link to comment Share on other sites More sharing options...
flight1 Posted March 24, 2015 Share Posted March 24, 2015 A pattern prop is designed to suit 'pattern' flying, so the blade will be designed to give good pull on the up and braking effect on the down where the engine is un loaded, so it is there to help you with a more constant air speed. Also is is proberly not as tough as a sport prop specially the blade near the hub. it will be tougher than a electric prop. Quote Link to comment Share on other sites More sharing options...
Sam Wragg Posted March 24, 2015 Share Posted March 24, 2015 A pattern prop (apc)is generally anything above an 8" pitch ie 10x9/10/11/12/13/14. Using this type of prop reduces the noise footprint of the model, which is crucial in F3a comps (pattern),and also for everyday use. N.... ie 13x13.5N. Signifies a narrow blade which puts less load on the engine allowing it to turn greater pitches with reduced down line braking effect. W.....ie 13x10W. Signifies a wide blade which increases the load on the engine with better braking effect. E.. Signifies a blade/prop specifically designed for Electric propulsion systems and is NOT designed for I. C use. As a matter of extreme safety do not use on an ic engine An ic prop is a lot heavier than an equivalent electric prop. If you was to measure the current drawn by an electric motor and compared like for like between the same size electric & & ic prop you will find the current draw will be significantly higher for the ic varient of prop Hope this helps Sam Edited By Sam Wragg on 24/03/2015 19:55:22 Quote Link to comment Share on other sites More sharing options...
Richie P Posted March 24, 2015 Author Share Posted March 24, 2015 sam iam glad you picked up on this thread not only can i use this prop on my racing corsair but youv also pointed me in the right direction of what prop to use on my pattern ship, they dont tell you in manuels to ues pattern props i only came across them by mistake Quote Link to comment Share on other sites More sharing options...
iqon Posted March 24, 2015 Share Posted March 24, 2015 Posted by Richie P on 24/03/2015 18:37:41: can anyone tell me the difference between electric and pattern props, i have a 11x12 apc pattern prop can i use this on an electric model cheers richie Yes you can... but as above dont use elec props on ic.... Quote Link to comment Share on other sites More sharing options...
Peter Android Posted March 27, 2015 Share Posted March 27, 2015 Q. for like between the same size electric & & ic prop you will find the current draw will be significantly higher for the ic varient of prop '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' Eyup Owdlad. An I.C Prop has to withstand the " knock it on the Head " bash of combustion ( double hard with a 4T) along with the violent acceleration / deceleration of the piston and other reciprocating masses , plus the variable torque / rpm loads , hence its Mass / weight . A sparky thing , apart from the ( possibly) odd violent stop / start has much more of a " constant " since its torque is a consistent at all rpm. , which in turn affords a much lighter , more efficient prop . . which may explain why a leccy ' will fly smoother at slower speeds than an I.C , even if its overall model mass / weight is the same . The torque load is largely irrelevant, it's how the load is delivered what counts. e.g . A V -Twin Motorcycle will devour it's drive chain ( because of the irregular and violent power pulses ) than a relatively smooth - running in - line 4. * Increasing the rpm on an I.C magnifies this effect , but to the human ear it will sound smoother . Quote Link to comment Share on other sites More sharing options...
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