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Model Forum / Radio Controlled / Helicopters / June 2009Idle up questions T-Rex
starting to get a bit more bold in flying around now, so how do you set the pitch so when you change from one idle up setting to another the heli does not leap up or down? do I set it in normal so it hovers at 3/4 stick? so when I go to idle up its more or less the same? as I have been dying to have a go at a loop or stall turn but been a bit worried if I hit idle up its going to go pear shape and dive for the ground  SignatureKevin R Reply address works >starting to get a bit more bold in flying around now, >so how do you set the pitch so when you change from one idle up setting >to another the heli does not leap up or down? You don't. Usually, the two curves match relatively closely at climb, so just add plenty of pitch before you switch. Some radios allow you to program a soft transition between flight modes. >do I set it in normal so it hovers at 3/4 stick? so when I go to idle up >its more or less the same? You could very well do that. Personally, I feel that only 1/4 stick from hover to full power climb is too sensitive in normal mode. Try it and see if you like it. >as I have been dying to have a go at a loop or stall turn but been a bit >worried if I hit idle up its going to go pear shape and dive for the >ground Simply start a rapid climb before you switch. It'll be much less dramatic than you expect. With a little bit of practice, you can flip the switch and move the collective stick at the same time, making the transistion almost seamless. BTW: You can perfectly well do loops and stall turns without negative lift. Just back off on the collective as much as you can without dropping the engine to idle. SignatureRoRo >> starting to get a bit more bold in flying around now, >> so how do you set the pitch so when you change from one idle up setting [quoted text clipped - 23 lines] > lift. Just back off on the collective as much as you can without > dropping the engine to idle. tis electic so no issues with idle :-) and I have tweeked the throttle curve so its more like a dog leg more or less full power at about 1/8 throttle SignatureKevin R Reply address works >starting to get a bit more bold in flying around now, >so how do you set the pitch so when you change from one idle up setting [quoted text clipped - 4 lines] >worried if I hit idle up its going to go pear shape and dive for the >ground Easy. Set your mechs up so mid stick gives you 0 pitch. Set your pitch curves however you want for each mode, but match the curves from mid-stick up to each other. Do the same for the throttle curves. Voila! No more surprises when switching between modes. Here's how most of my electric helis are set up: NOR-THR 0, 45, 90, 95, 100 NOR-PIT 42, 46, 50, 75, 100 ILD1-THR 100, 95, 90 95, 100 IDL1-PIT 0, 25, 50, 75, 100 See how the curves match each other from mid-stick up? I can switch between modes all day long in the air and you'd never know it unless you saw me flip the switch. >> starting to get a bit more bold in flying around now, >> so how do you set the pitch so when you change from one idle up setting [quoted text clipped - 21 lines] > between modes all day long in the air and you'd never know it unless > you saw me flip the switch. just been out with my T-Rex first time for a while, had a play with the idle up switch what a anti climax hardly made any great difference to the height, don't know why I was so worried ;-), had a go a a 540 stall turn for a laugh not tried a loop yet seems like it will loop quite easily, but decided to sort of stall turn before it went to far perhaps next week :-), as I am still getting used to the orientation it seem to heading back towards me even though its flying away but that I hope will come with a bit more flying SignatureKevin R Reply address works >just been out with my T-Rex first time for a while, had a play with the >idle up switch what a anti climax hardly made any great difference to [quoted text clipped - 4 lines] >heading back towards me even though its flying away but that I hope will >come with a bit more flying If you can keep track of where the heli was headed and what you expect it to do with your control inputs, maintaining orientation in your head will become a lot easier... >> just been out with my T-Rex first time for a while, had a play with the >> idle up switch what a anti climax hardly made any great difference to [quoted text clipped - 8 lines] > it to do with your control inputs, maintaining orientation in your > head will become a lot easier... I am beginning to realise that :-) and my moments of pure panic are getting less but I do find I still pull back cyclic for "up" a lot ,I think that's from years of flying planes SignatureKevin R Reply address works >>> just been out with my T-Rex first time for a while, had a play with the >>> idle up switch what a anti climax hardly made any great difference to [quoted text clipped - 8 lines] >> it to do with your control inputs, maintaining orientation in your >> head will become a lot easier... > I am beginning to realise that :-) and my moments of pure panic are > getting less but I do find I still pull back cyclic for "up" a lot ,I > think that's from years of flying planes Don't feel bad about that. You're not the first fixed wing pilot to come to understand that "power" not elevator ultimately controls altitude! :-) Have fun & Fly Safe, Steve R. >If you can keep track of where the heli was headed and what you expect >it to do with your control inputs, maintaining orientation in your >head will become a lot easier... Well said. I used to fly 50-sized nitro helis and have moved to the gasser world. My current gasser heli is extremely easy to fly, thanks to its large size and sheer mass. Then I fell in love with the T-Rex450 and added it to the fleet. I was in for a wild surprize. Wow, this minuscule and agile heli vanishes out of sight RIGH NOW! Your comment above, Kevin, proved absolutely correct more than a few times when strictly speaking I could not tell for sure just where the T-Rex is pointing (aaarrgghhh, eyes are getting old). Keeping continuous track of what the heli is doing versus the expected flight path from control inputs has repeatedly enabled me to "fly through" tough orientation situations. Some self-control and of course varied amounts of luck come into play here too. :) >I used to fly 50-sized nitro helis and have moved to the gasser world. >My current gasser heli is extremely easy to fly, thanks to its large [quoted text clipped - 10 lines] >through" tough orientation situations. Some self-control and of course >varied amounts of luck come into play here too. :) hehe, those little 450s get up and get movin' pretty quick.. You'll learn to keep 'em close so they don't get too "small". I find myself migrating towards the larger helis as well.. I *rarely* fly any of my 450s anymore. Smallest I've flown in a log time is my Trex 500 and I'm in the middle of building a Bergen Turbine swingin' 810mm blades.. Should have that one done by the end of the month... > I'm in the middle of building a Bergen Turbine swingin' > 810mm blades.. Should have that one done by the end of the month... What, you ain't got that thing flying yet?? I'd have thought you'd be sending the engine in for it's first maintenance overhaul by now!! ;-) I'm real curious to see what you think of it when you get it flying! Keep us informed. Good luck & Fly Safe, Steve R. >What, you ain't got that thing flying yet?? I'd have thought you'd be >sending the engine in for it's first maintenance overhaul by now!! ;-) [quoted text clipped - 4 lines] >Good luck & Fly Safe, >Steve R. LOL, nope. Getting very close tho. Just bought the last of the servo extensions and fittings to finish it up. 14 or 15 build vids up on Helifreak.com as well. >>What, you ain't got that thing flying yet?? I'd have thought you'd be >>sending the engine in for it's first maintenance overhaul by now!! ;-) [quoted text clipped - 8 lines] >extensions and fittings to finish it up. 14 or 15 build vids up on >Helifreak.com as well. Pulled an all-nighter (well, until 3:30 this morning anyways) last night All the electronics are installed and connected up. Just need to dress all the wires down and secure the Rx to the rear of the frame. Just the tailboom and final setup. aftr that. Maiden this weekend?? Very possible! |
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