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300X Blade 300X Helicopters Information and Help |
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03-05-2014, 12:48 PM | #141 (permalink) | |||||
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EDIT: Not the best execution but this is the kind of tic-tocs I'm talking about: http://youtu.be/NYORqbAEfGQ?t=54s
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
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03-05-2014, 04:52 PM | #143 (permalink) | |||||
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Skip to 0:15
Skip to 0:35
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03-05-2014, 10:22 PM | #144 (permalink) | |||||
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Here's a flight of my stock powered 130X with heavy aluminum boom with 3rd TT bearing support over stock CF boom. See how stock power struggles elevator tic-tocs at 0.16 so I have to wait for HS to restore. See how I try to do as fast aileron tic-tocs as possible at 0:32. I cheat by letting it slowly drop not making 1G vertical vector (BTW the X3 vido also cheated the same way) but OTOH I bang the aileron as fast as possible (speed limited by stock linear servos). If there was enough power to make 1G vertical to maintain altitude in that case, it would've been 2.5G+ horizontal and very likely pushing the heli off track very easily.
And here's one with more power to keep afloat and even gain altitude, but the problem is the heli is super hyper all over the place (1st 30 seconds or so and about 1:10).
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC Last edited by DoubleCH; 03-06-2014 at 01:14 AM.. |
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03-05-2014, 11:00 PM | #145 (permalink) |
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Join Date: Apr 2004
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Re: Blade 300 CFX
A lot of big vs small is the illusion of speed and displacement. If you fly the same path with a 30" & 60" span machine the latger machine will appear much more stable and precise because it will appear to travel half the distances relative to its size. And gravity will also seem to have half the effect on the larger platform.
Much the same a 747 appears to lumber along flown at similar sppeds as a small biz jet
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03-05-2014, 11:35 PM | #146 (permalink) |
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True! That's 1 factor making small heli inheritedly easier to get off track (i.e. twitchier). While gravity pulls a big heli the same rate as a small heli (the same 9.8 meter per second squared) and both helis fall at the same rate (let's take wind resistance out of the question for now), a small heli will seem to fall faster simply because we judge how fast it falls by how many heli lengths not by actual speed like meter per second. If a 700 falls 3 heli lengths a second, the same falling speed for a 300X will be like 8 heli lengths a second.
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
03-06-2014, 12:37 AM | #147 (permalink) | |
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03-06-2014, 11:34 AM | #149 (permalink) |
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Yeah, that's what I'm saying. By bigger I mean 300X and up. By smaller I mean micros. Even my 300X with cheap Corona 919MG servos at .06s are plenty fast for fast tic-tocs. And I've shown you TGY-S306Gs at .06s are good enough in my 450DFC with less than 3000HS. Servos for the micros aren't fast enough, especially when you consider the scale factor Centurian mentioned on not just the servo speed required but for the overall effect.
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
03-06-2014, 03:52 PM | #150 (permalink) |
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Join Date: Jul 2012
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That 300CFX demo video by Sergio is really good (very spiffy flying skills), but DoubleCH is absolutely correct about the headspeed dropping on those tic tocs at 1:05. I've got three 300Xs. One is mostly stock and the other two are beefed up with 450 sized motors, big pinions, Lynx frames, and governed at high headspeeds (3700RPM and 4000RPM). No one is arguing that a stocker (whether it be an X or CFX) can't tic toc, but what DoubleCH is saying is a stocker simply can't rapidly tic toc without bogging. A stocker X or stocker CFX is not going to have the crisp cyclic responses that my two 300Xs get during punch maneuvers, and the stock 320H motor simply doesn't have the torque to rapidly tic toc without a serious drop in headspeed. In order to make a tic toc look good on the stocker motor, regardless of what pinion is being used, you have to let it hang a little to keep the headspeed up. This does not mean the bird has to travel like a rainbow; with proper collective and cyclic management you can let it hang while still keeping the tail stationary on the clock's axis. So ultimately this means that you can do a real tic toc on a stocker and still make it look good, but it's simply not going to be very fast (relatively speaking). A bigger motor and higher RPM is the obvious solution for that. As far as servo speed goes, I'm running TGY-211s for my 300Xs' cyclics, and at 0.12s-4.8v/0.10s-6.0v they're plenty fast enough for even the most extreme stuff on birds of this size. Generally speaking, with any size bird, a 3D pilot will benefit more from higher RPMs and more torque than from faster servos, especially for pitch pump maneuvers.
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03-08-2014, 06:58 AM | #151 (permalink) |
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03-09-2014, 12:00 AM | #152 (permalink) |
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Won't help if the motor is underpowered. I tried 10T with stock motor and good governor in my then otherwise stock 300X. There's so much a good governor can do when the motor is underpowered.
Or just need an "expert" pilot like James H. who can plan his routine to wait-and-restore HS after each move and avoid moves that require a powerful enough motor. That's probably why the CFX is rated "expert", not intermediate, not even pro (who probably bangs sticks which will kill HS in no time with stock CFX ).
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mCPx'es/130X/3D-foamie: ugly mods 300X: fast beater/trainer, Protos stretched: trainer but can also go fast FPV250 5.8G, nQx FPV, Oh also Trex 450DFC |
03-09-2014, 03:30 AM | #153 (permalink) | |
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03-09-2014, 03:33 AM | #154 (permalink) |
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All of the electrics are the same
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03-09-2014, 05:45 AM | #155 (permalink) |
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Join Date: Jul 2012
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While James lacks the technical skills of pilots like Kyle Dahl (who is by far the best heli pilot in the world, IMHO), he's an incredible pilot who puts most of us to shame. Nevertheless, I would like to remind everyone of those MCPX V1/V2 demo videos that we all remember so well, and I think it'd be wise to keep those in mind when you evaluate these 300 CFX demo videos.
I'm waiting on a headstrap to arrive in the mail that is designed for a smartphone. This way I can record my heli videos without dumping money into an action camera. Once I get it I'm going to grab some video of me doing piro flips and funnels on my mostly stock MCPX V2 (the only non-stock parts are MH grips and swash). I'll also grab some video of my 300Xs. The reason will be to illustrate that what you see in those demo videos is indeed possible, even by lesser pilots like myself, but that those same videos are nothing more than advertisements with one goal in mind - to get a bird onto your workbench. As I stated in another thread... A turd is a turd, and a polished turd is still a turd (Mythbusters proved that you can polish "a poop" in one of their episodes). This means that the motor and drive train on the 300 CFX is a polished turd.
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03-09-2014, 07:15 AM | #156 (permalink) |
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03-10-2014, 04:30 AM | #157 (permalink) |
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Join Date: Jan 2014
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I read that Lynx and Microheli carbon frames for 300x are "heavy" while resisting flex and crash damage. Wonder how heavy/light the 300cfx frame shall be? Seems like a CF frame that had good anti-flex bracing but much lighter weight should be possible....and even if it were a little less crash worthy would be sought after if parts were sold at a decent price. Those who crash less would do well with it.
I say....the 300x No Bling CF Lite frame is what we need. |
03-10-2014, 08:34 AM | #158 (permalink) |
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Join Date: Jul 2012
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I've had a few minor crashes on my two Lynx framed 300Xs; so far the frames haven't seen any damage whatsoever. But I haven't "buried" either frame yet (you know, those crashes where the frame is converted to a coffin and the crash site becomes hallowed ground)...
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05-13-2014, 09:26 AM | #159 (permalink) |
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when is hitting the uk?
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05-13-2014, 12:12 PM | #160 (permalink) |
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Join Date: Aug 2007
Location: Georgia
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Just seen a 300CFX video many it looks nice i hadn't realized the whole head came aluminum with aluminum head block and arm on the servos. that looks super nice. maybe it is worth the money there asking for them hope everyone enjoys them.
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