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Model Forum / Radio Controlled / Helicopters / March 20043D Flying
Morning all... Perhaps a silly question, but a question never the less.... To fly a chopper upside down(which I assume constitutes as 3D) do you require a Governer of some kind. As I increase the throttle on my JR Max 66, the pitch increases and as I decrease the throttle, the pitch decreases... I have something on my radio called throttle lock. The book that came with the radio said that this was for practicing Auto's... You can only set throttle lock to 50% which then allows you to change pitch without affecting the throttle... however, 50% is not enough throttle to ensure that the rotor is spinning quick enough to fly upside down... By the way I have a Raptor 30.V2 Any info will help, Thanks James James - There are many books on setting up your radio/heli for 3D. You need to invest $15 or so to get one. It is probably more important that you visit a heli flying field and get some help. As your question indicates that you are still on the very steep end of the learing curve, you need to watch and then talk with someone who can do 3D. He will not only be able to set your machinery up, but also explain to you what he is adjusting and why he is making the settings. You will find the instructions on flying upside down clearly written on the bottom of a 55 gallon drum of model fuel. Tom > Morning all... > [quoted text clipped - 18 lines] > Thanks > James > Morning all... > [quoted text clipped - 10 lines] > without affecting the throttle... however, 50% is not enough throttle > to ensure that the rotor is spinning quick enough to fly upside You should also have a switch called "Idle up" which allows full throttle at both ends of the threottle stick travel. This is the switch to use not the throttle hold (auto) switch. A governor is a wonderful tool though and fitting one to your Rap would make a difference in how it flys even if you DON'T fly it upside down  SignatureBeav Please note my E-mail address is "beavis dot original at ntlworld dot com" (with the obvious changes) Beavisland now lives at www.beavisoriginal.co.uk >Subject: 3D Flying >From: system@icon.co.za (James) [quoted text clipped - 23 lines] >Thanks >James Other posters have already covered some of this, but the magic bit you need to know about to answer your specific question is the 'V-throttle' curve!! The way most people fly 3D these days is to have zero pitch and engine tickover at half stick, then as you move the stick away from you, the throttle and pitch increase, and as you pull the stick towards you the pitch goes more and more negative, while the throttle (and therefore engine speed) increases. Some radios can't achieve this set up, I don't know whether yours can or not. If you are trying this for the first time, it might be best done on a simulator, as some controls will obviously be reversed with the helicopter upside down. Morning everybody! Thanks for the input guys, The reason that I am doing this the hard way is because I do not belong to a club as I live in the middle of no where, I have done everything thus far on my own and I think I am doing ok... But there are obviously those questions that I have to ask because I am completely clueless... I will scramble through my Radio's guide and then give you feedback on what I found... One question though... If you setup the radio so that there is 0 pitch or hover pitch at middle stick, you say the as pitch increases the throttle does too and when the pitch decreases past middle stick the engine speed increases too...(V-Curve i think you called it, the question is, are you not then left with 0 lift and dropping rotor speed for the few seconds that you move the pitch stick from top to bottom? I am going to download that manual and check about this idle up stuff... Thanks All James > Morning everybody! > [quoted text clipped - 14 lines] > speed for the few seconds that you move the pitch stick from top to > bottom? stab in the dark here, but I'm guessing that at half stick, there's 0 pitch therefore the blades are spinning quite freely (remember, you CAN lift with no engine), and as you are just skippy past this centre-trick it doesn't matter. I mean how long will it take your blades to go from 5deg +ve to 5deg-ve? The throttle will just go "mmmm happyhovering.....idle...mmmmhappy.." and it'll all happen in like 0.2 of a second. >> Morning everybody! >> [quoted text clipped - 19 lines] > CAN lift with no engine), and as you are just skippy past this > centre-trick skippy past this centre-trick? What am I on? Drugs? "skipping past centre-stick" > > stab in the dark here, but I'm guessing that at half stick, there's 0 > > pitch therefore the blades are spinning quite freely (remember, you [quoted text clipped - 4 lines] > > "skipping past centre-stick" ROTFLMAO! :-D Thanks Carl, nice to know I'm not the only one who's hands can't keep up with the brain! Or is that the other way around? ;-) Fly Safe, Steve R. > Morning everybody! > [quoted text clipped - 17 lines] > I am going to download that manual and check about this idle up > stuff... Drag from the main rotor at zero pitch is much lower so the power required to maintain rotor RPM is much lower - I run a 'U' curve rather than a 'V' curve with the 20% & 80% throttle points at just above hovering throttle - the JR PCM10 SX can be set to change the 'hard points' into a smooth curve for me, so I only use 5 points for idle-up curves. On machines with no governor I run a large mix from both cyclics to throttle so that rotor RPM don't decay when flipping/rolling from upright to inverted & vice-versa - full cyclics at zero pitch adds a LOT of main rotor drag. Ciao... [UK]_Nick... SignatureNick M V Salmon Master Mariner MN(Retd.) Email: My four initials at dsl dot pipex dot com http://www.nmvs.dsl.pipex.com/index.htm > Morning everybody! > [quoted text clipped - 14 lines] > speed for the few seconds that you move the pitch stick from top to > bottom? No:-) Reason being the "V" doesn't take the engine from full throttle at each end to NO throtle in the centre of the "V". You program the centre value to around 40% which allows the engine to keep things up to speed while not allowing things to OVERspeed (well not too much anyway) > I am going to download that manual and check about this idle up > stuff... Good thinking. Read it many times too and eventually it'll all become obvious. (sort of:-) SignatureBeav Please note my E-mail address is "beavis dot original at ntlworld dot com" (with the obvious changes) Beavisland now lives at www.beavisoriginal.co.uk |
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