T-REX 450: 3D Headspeed

[StarmanDXE]

Hey everyone,

I was just wondering what headspeeds you run on your T-REX 450 when you're doing 3D.

Also, what's the slowest you've done 3D with? :p


Thanks! :)

[Twisterested]

3200 rpm is the best headspeed for hard 3D 2800 is ok too

[stuka]

How much swash plate movement in roll and pitch does one need for loops and rolls. Ive been flying my Trex for two years now and cant get it to loop or roll. Im fine on the simulator, so its my setup Im sure(mostly:)
thanks

[Twisterested]

TX ? futaba ? if it is , go to swash afr and increase the aileron and elevator to about 62%

[stuka]

thanks, I think im around 50% right now, but havent looked in ages. IM on a Hitec Eclipse,but the should be the same. How much expo do you like if any? Ive heard noe to 50% or more.
Sorry for the delay in respondig, I forgot this thread.

[StarmanDXE]

thanks, I think im around 50% right now, but havent looked in ages. IM on a Hitec Eclipse,but the should be the same. How much expo do you like if any? Ive heard noe to 50% or more.I think 50% might be a bit much. Eventually, you won't really want any...


Sorry for the delay in respondig, I forgot this thread.Yeah... That's why I use that "My RCGroups" link on the far left of the blue bar at the top. Shows you new posts in anything you're subscribed to, and you are automatically subscribed to any threads you post in! ;)

[stuka]

I think 50% might be a bit much. Eventually, you won't really want any...
Checked my tx and the roll and pitch is set at 30% in swash. Expo is at 40% for roll and pitch. I did try a loop high up in the spring but it was clearly not enough swash. Sort of flopped neat top and rolled over. Fortunately was high. I worry about hover stability if I have enough throw for aerobatics. l clearly I dont have something in the setup and skill level quite right yet.


Yeah... That's why I use that "My RCGroups" link on the far left of the blue bar at the top. Shows you new posts in anything you're subscribed to, and you are automatically subscribed to any threads you post in! ;)
Never knew that! Il look it over. Thanks

[daking]

2600 rpm min for aerobatic flight. 3000+ is good for hard 3D. Loops and rolls are not 3D.

A good setup on a rex 450
3000 HS
7 or 8 degs of cyclic
I run between 50 and 60% expo
1191 paddles with no weights.
450L can pull about 9degs of pitch, not much.
medusa 3400kv can pull over 11 degs, perfect !!
450XL can pull the same.

When doing loops its best to start high and kinda fast. keep the postive pitch in long enough to push the heli over the top, unless you want to stop at the top. then add a little neg to hold it inverted and when it slides down the back side add postive back in and fly out. pretty easy when you get a couple under your belt.

hope this helps
dk

[StarmanDXE]

Old thread :p


Geeze. Only 7 or 8 deg on cyclic? I think mine goes up to about 12... :rolleyes: Maybe that's why the tail can't hold on full positive pitch! :eek: ;)


Well, I definitely need to program in a curve without a "0" point at the bottom for my next attempt. First attempt a month or so ago ended up in me freaking and then an inverted landing :D But, I'm sure once I've done a few I'll be fine. Was messing with my plane (as I don't want to try flying my heli with gloves on. Controls are too precise) and I was looping and rolling it. Gets a lot easier after the first few :)

[daking]

Old thread :p


Geeze. Only 7 or 8 deg on cyclic? I think mine goes up to about 12... :rolleyes: Maybe that's why the tail can't hold on full positive pitch! :eek: ;)


Well, I definitely need to program in a curve without a "0" point at the bottom for my next attempt. First attempt a month or so ago ended up in me freaking and then an inverted landing :D But, I'm sure once I've done a few I'll be fine. Was messing with my plane (as I don't want to try flying my heli with gloves on. Controls are too precise) and I was looping and rolling it. Gets a lot easier after the first few :)

7 or 8 deg of cyclic, not collective. Yes you should be able to get 12 deg out of collective. And yes your tail should hold.

Not sure what you mean by 0 point at the bottom. If your talking about your collective then no, you want 0 pitch at 1/2 stick. +10 degs at full stick and -10 degs at full down stick.

DK

[StarmanDXE]

7 or 8 deg of cyclic, not collective. Yes you should be able to get 12 deg out of collective. And yes your tail should hold.Oh. So you're saying tilt?
Also, I think my tail doesn't hold because I'm running the new, lower gear ratio and only doing about 2600 rpm on the head :rolleyes:

Not sure what you mean by 0 point at the bottom. Sorry :p Let me clarify: throttle.

[daking]

Yes, cyclic is ail and elev.

I have the new tail gears also but am around 3000. Gyros are a pain to setup but when there right, there awsome.

You want throttle to come in on the neg side of pitch also. Your throttle curve should be somthing like this. 100,80,80,80,100. Half stick is 0 pitch and 80% throttle. Then up or down on the throttle brings in more pitch and power. make sense?

DK

[StarmanDXE]

Yes, cyclic is ail and elev.

I have the new tail gears also but am around 3000. Gyros are a pain to setup but when there right, there awsome.I think everything is setup fine. It's just, when I do full pitch up, it slowly rotates around as if the tail isn't spinning fast enough.

You want throttle to come in on the neg side of pitch also. Your throttle curve should be somthing like this. 100,80,80,80,100. Half stick is 0 pitch and 80% throttle. Then up or down on the throttle brings in more pitch and power. make sense?Yeah, I just haven't gotten around to programming an Idle-up for 3D yet (as I'm not really doing 3D :p). And I've got a Jazz. So, I just run a flat curve and let the governor do it's thing :D

[hurleybt]

Whatever headspeed my 430XL puts out at 100% is what I use :) And I fly with 325 pro woodies. yay!! I am thinking it's probably 3100+ in a hover.

[Cooker]

What flight times are you getting at that HS ??

[InsomniaZZZ]

Whatever headspeed my 430XL puts out at 100% is what I use :) And I fly with 325 pro woodies. yay!! I am thinking it's probably 3100+ in a hover.

Aren't the wood blades rated at 2400 max?

[bigdog714]

From what I have read, with a 120 degree swash your expo shouldn't exceed 25%, I fly 15% & 5%, 65% cyclic and 80% pitch, with + or - 12 degrees and a head speed at 2200rpms and Mavrikk 325 carbon blades on my SA, she flips and rolles on a dime, I just kicked it up to 2600rpms to get better balance untill I am comfortable with inverted flight, 2200rpms is about 8min. flight time , and at 2800 I was getting around 5min. out of a TP 2050mAh.

[hurleybt]

Aren't the wood blades rated at 2400 max?

Align's 325 pro woodies are rated at 2800 RPM.

[bigdog714]

Align's 325 pro woodies are rated at 2800 RPM.
I have not read that, were did you find it, I have yet found a wood blade that is rated over 2400rpm :cool:

[caotri]

Tes the red/whitle rate 2800rpm, the black/whilte seem is 2500 only.

[InsomniaZZZ]

Aren't the wood blades rated at 2400 max?

Where the statement above came from:
http://www.trextuning.com/stockblades.php: The Trex 450X seems happiest at around 2400 rpm for headspeed which is the limit for the wooden blades supplied in the kit.

Those don't look like the PRO blades though. I might have also got the number confused with the 450 night blades (http://www.align.com.tw/shop/product_info.php?cPath=22_72_82&products_id=1567), which had a little note in the packaging, limiting the max RPM to 2400 (they are CF though).

Now, what are comfortable (as in "safe") RPM ranges for the plastic blade grips vs. metal grips?

[hurleybt]

To answer an earlier question, I get about 5 minutes of flight time with my straight, 100% th curve on AT, 3S, 2200mAh batts pushing the 430XL / 13T pinion with a headspeed of 3000+ easily. I'd prefer to use CF blades, as these woodies bleed energy pretty fast, but I crash a lot still... so I'm sticking with my white/red 325 pro woodies. Also, Jason Chow, with that insane 450 video in the kong power contest, recommended this setup I'm running now... as that's what he used for quite a while.

I have a reduced th-curve that gives me about 10 minutes of flight time on the same bird... about 65% throttle at the mid point, and 80% on the top ends to keep a smooth feel.

[caotri]

To answer an earlier question, I get about 5 minutes of flight time with my straight, 100% th curve on AT, 3S, 2200mAh batts pushing the 430XL / 13T pinion with a headspeed of 3000+ easily. I'd prefer to use CF blades, as these woodies bleed energy pretty fast, but I crash a lot still... so I'm sticking with my white/red 325 pro woodies. Also, Jason Chow, with that insane 450 video in the kong power contest, recommended this setup I'm running now... as that's what he used for quite a while.

I have a reduced th-curve that gives me about 10 minutes of flight time on the same bird... about 65% throttle at the mid point, and 80% on the top ends to keep a smooth feel.
Can red/white pro balde handle 3000+? i refer to get about 3000rpm but worry about the balde capability. since it sayd 2800 rpm limited.

[desert_flyer]

Can red/white pro balde handle 3000+? i refer to get about 3000rpm but worry about the balde capability. since it sayd 2800 rpm limited.

If they could handle 3000+rpm, they wouldn't be rated for 2800 max. Try the carbon blades for higher HS.

[Speed Stick 3D]

I was running 3846 with my old Rex with a 430 XL motor 13 T Pinion and 4 cell li-po.. Great 3D

Thanks Speed stick 3D :D