cas_whitmore Posted September 20, 2017 Share Posted September 20, 2017 Fantastic 'well done , had a plan stuck to it then got airborne bravo. Cas . 1 Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 (edited) Thankyou so much cas. Still aways to go before I make more frames .just needed to know if the project was worth doing .looking forward to finding out how long we can fly for .you can do all the maths in the world but nothing like seeing it in action Edited September 20, 2017 by waynemackie67 Quote Link to comment Share on other sites More sharing options...
AndyB Posted September 20, 2017 Share Posted September 20, 2017 1 hour ago, waynemackie67 said: Thankyou so much cas. Still aways to go before I make more frames .just needed to know if the project was worth doing .looking forward to finding out how long we can fly for .you can do all the maths in the world but nothing like seeing it in action If you want any help re calcs, I could help. the calcs are actually extremely accurate. I have used high power elec systems for over 15 years on RC planes and can design and chose power system components without having to test them! They are very predictable. 1 Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 Thank you so much for the offer of your help . I would like some guidance on a good throttle design as I'm using rc car one it's to bulky Quote Link to comment Share on other sites More sharing options...
Casper Posted September 20, 2017 Share Posted September 20, 2017 Look at this prototype throttle. https://www.facebook.com/vikingppg/ 1 Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 Thanks cas I've got a machine shop so should be able to copy that one to a good standard Quote Link to comment Share on other sites More sharing options...
AndyB Posted September 20, 2017 Share Posted September 20, 2017 Are you using a radio link or wired? Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 Radio link at the moment but would prefer wired Quote Link to comment Share on other sites More sharing options...
Guy Posted September 20, 2017 Share Posted September 20, 2017 Congratulations Wayne, you must feel proper chuffed! What is the weight of the unit please? Clearly there are a number of us on this forum with back issues and I was wondering if 'leccy power might help. Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 Thankyou guy .yes I'm very happy to get something in the air that myself and a friend have made .in the beginning we thought about power ,thrust and weight .but in the end I just made the lightest frame I could with out sacrificing safety. I will weigh the frame tonight and put up the results but the main result for me is still to come .how long can we fly under power at the end of the day that's all that matters . The test pilot weighs about 17 stone so I know take off power is spot on just need to get same pilot to fly round till he drops lol then I know my self at 13 stone should get a little longer out of it .obviously the type of wing will make a difference aswell . Quote Link to comment Share on other sites More sharing options...
AndyB Posted September 20, 2017 Share Posted September 20, 2017 Wired link is much easier and MUCH more reliable. First you need the specs for the esc, specifically what the control/input is. Is it anologue? If so what voltage range drives it from zero to full speed across the speed contact. This will currently be the voltage output from the receiver. Quote Link to comment Share on other sites More sharing options...
cas_whitmore Posted September 20, 2017 Share Posted September 20, 2017 Scaleletric. Throttle ' ? Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 Variable resistor would be a nice way of putting it lol Quote Link to comment Share on other sites More sharing options...
AndyB Posted September 20, 2017 Share Posted September 20, 2017 Yes, but to do it you need to know the esc voltage range for the throttle channel. It is in the specs for it. You need this so that the voltage and resistance you use in the "scalectric" handle can be chosen to match the esc requirements. Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted September 20, 2017 Author Share Posted September 20, 2017 My friend Adam is more the electric man than me I just designed and made the reduction drive and built the frame .i am the more mechanical one . Quote Link to comment Share on other sites More sharing options...
AndyB Posted September 20, 2017 Share Posted September 20, 2017 Most modern servos or esc's use PWM (pulse width modulation). A square wave is sent to the esc and usually if the frequency is 2ms that is full, 1ms zero. A very simple way to operate an esc manually is to use a servo tester. I always use these on first setup to prevent any radio mishaps. Here is the sub $10 Hobbyking one... https://hobbyking.com/es_es/turnigy-servo-tester.html Quote Link to comment Share on other sites More sharing options...
supre nerd Posted September 26, 2017 Share Posted September 26, 2017 try using lithium ion batteries Quote Link to comment Share on other sites More sharing options...
Hemberg Posted October 6, 2017 Share Posted October 6, 2017 (edited) On 2017-09-18 at 18:28, AndyB said: Electric also creates a new and VERY dangerous hazard. When batteries are connected and ready to go, but throttle at zero, the prop is stationary. The machine looks like it is off! However, the maximum torque and hence maximum damage potential is at that point. Many rc plane fliers have lost fingers because they thought it was switched off. This is why on all high power electric machines we use solid state cutoff devices......you can't have a "big switch" because the current is massive. If I had an electric motor I would like to have a strobe light on the motor. So when its live the strobe is always on. I have a led strobe light myself on my old fashion device and they are very bright. Also the throttle could have led light indicating that it is on. And of course a tone when turning on the motor. Or maybe optional. on idle there is always a tone. Edited October 6, 2017 by Hemberg 1 Quote Link to comment Share on other sites More sharing options...
waynemackie67 Posted October 6, 2017 Author Share Posted October 6, 2017 I have a big red switch but great idea strobe light spot on .that's going on it Quote Link to comment Share on other sites More sharing options...
Guy Posted October 8, 2017 Share Posted October 8, 2017 On 10/6/2017 at 10:13, Hemberg said: If I had an electric motor I would like to have a strobe light on the motor. So when its live the strobe is always on. I have a led strobe light myself on my old fashion device and they are very bright. Also the throttle could have led light indicating that it is on. And of course a tone when turning on the motor. Or maybe optional. on idle there is always a tone. I feel that I would be safer with a strobe. Do you have any details on yours / link to a site where I could get one? Thanks, Guy Quote Link to comment Share on other sites More sharing options...
Hemberg Posted October 8, 2017 Share Posted October 8, 2017 I bought mine from a fellow swede that makes them. Had it for about 2 years maybe. People are impressed by the power of it, even airplane pilots. I can ask if he still makes them. Used to have one from microavionics, a standard discharge strobe but this one is brighter and does not affect radio. Quote Link to comment Share on other sites More sharing options...
Guy Posted October 8, 2017 Share Posted October 8, 2017 22 minutes ago, Hemberg said: I bought mine from a fellow swede that makes them. Had it for about 2 years maybe. People are impressed by the power of it, even airplane pilots. I can ask if he still makes them. Used to have one from microavionics, a standard discharge strobe but this one is brighter and does not affect radio. That would be helpful, but please don't go to too much trouble. Thanks, Guy Quote Link to comment Share on other sites More sharing options...
Hemberg Posted October 9, 2017 Share Posted October 9, 2017 He have stopped making them I'm afraid Quote Link to comment Share on other sites More sharing options...
Guy Posted October 9, 2017 Share Posted October 9, 2017 21 minutes ago, Hemberg said: He have stopped making them I'm afraid Ok, thanks. Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted October 9, 2017 Share Posted October 9, 2017 I love how it sounds Nice one for getting to this point. I am lurking with interest. SW Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.