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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › Looking for the best way to calm down my Trex
07-30-2007 07:07 PM  13 years ago
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husafreak

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Livermore, NorCal

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Looking for the best way to calm down my Trex
So I've done everything I could think of to make my Trex Hyper. I could laundry list but you get the idea. Now I'd like to back off a bit and regain some stability. What is the best way to calm this heli down, flybar weights, different blades (I have V-blades), expo, lower headspeed, all would work but I'm looking for the best place to start, I wannna retain the ability to do and learn 3D moves, as it is I just can't keep up! It's scary to try new stuff with it. Thanks
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07-30-2007 07:19 PM  13 years ago
NCC81701

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Irvine, CA, USA

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Well if you got negative expo to make it hyper active, then that'd be the first to go. Next, I think increasing Flybar length and add flybar weight is the easiest/cheapest to change to make it more stable I mean you just can't mess with the laws of physics. That's just my opinion though.
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07-30-2007 07:23 PM  13 years ago
Kiwi King

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Next to the water heater, behind the trash can.

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When I put on the 335 blades, it seems like the rex is a little more tame. Also, you might want to go throug all your links and make sure that they are silky smooth, and don't stick. Flybar weights can also tame it down a little too.

KK
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07-30-2007 08:43 PM  13 years ago
copperclad

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NY

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I think increasing Flybar length and add flybar weight is the easiest/cheapest to change to make it more stable
adding weight to the flybar slows it down , but a longer flybar makes it more responsive , i know it's counter intuitive , but you would want to shorten the flybar to slow the response

here's a link http://www.w3mh.co.uk/articles/html/csm9-11.htm

scroll down to chapter 10
Increasing the weight of the paddles slows it down.
Increasing the area of the paddles speeds it up
Increasing the rotor RPM speeds it up
Increasing the aspect ratio (span/chord) of the paddles speeds it up.
Increasing the length of the flybar speeds it up.
hth dana
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07-30-2007 09:15 PM  13 years ago
Jason Chow

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La Crescenta, CA

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what i would do is lower your swash travel. meaning you are lowering the amount of aileron/elevator you have. also keep your headspeed around 2700-2800. you want the headspeed for stability.

by lower the travel of the swash, you keep everything linear just toned down. this imo is a way of toning your helicopter down.
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07-31-2007 01:49 AM  13 years ago
husafreak

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Livermore, NorCal

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I don't think lowering the swash travel is the way to go as I like the roll and flip rates at full stick the way they are. But it seems like flybar weights are the most popular place to start. I have the Gorilla paddles so I'll put the weights in them. I'll keep the headspeed high. I allready have expo to make it softer around nuetral. I agree on the flybar length. I put the longer flybar on my 600 and it made the cyclic more powerful. My Lepton is different, it is naturally soft around neutral. I took most of the expo out of it. thanks
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07-31-2007 02:11 AM  13 years ago
cwright

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Blossvale New York

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I agree that the weights and using expo is the way to go. I see that in your profile you are using a Futaba radio. If this is still the case Futaba uses a negative number for expo. Remember to set expo on both hi and lo rates on the aileron and elevator. Chuck
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07-31-2007 04:17 AM  13 years ago
Edge

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Indianapolis, IN

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My two cents for a lively and stable/(calm) setup:

I run SAB 320 blades, swash set for max throws, 220mm flybar, GG paddles w/no weights, and Jazz governor controlled Medusa motor (2900+ HS). I don't screw around with switchs in the air, fly all the time in idle up. Bird will roll/flip on a dime, is very stable in hover, and flys at high speed like it is on rails. The last ingredient is expo. This is a valuable tool that IMO pilots are foolish not to use. I would recommend running expo in the 15-20% range if you are a finger flyer, and in the 20-30% range if you fly with thumbs.

I don't think it's necessary to dumb down your setup to get a "calm" feeling bird!
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07-31-2007 12:38 PM  13 years ago
TomRex

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West Palm Beach Join Date: 12-28-2005

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Put the little brass weight back in the G paddles and go! Sounds like you got it way too quick!Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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07-31-2007 01:24 PM  13 years ago
MasterCrasher

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Not sure.

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Positive expo makes a huge difference. Try it, you'll like it.
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07-31-2007 01:29 PM  13 years ago
TomRex

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Not if you fly Futaba!Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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07-31-2007 05:22 PM  13 years ago
Edge

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Indianapolis, IN

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Put the little brass weight back in the G paddles and go! Sounds like you got it way too quick!
Bird flys perfect witout GG paddle weights, several hundred flights. However, to each his own. Everyone needs to fine tune their bird to their own taste.

And as to Futuba expo, positive expo will certainly provide a few thrills and trips to your LHS.
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07-31-2007 08:47 PM  13 years ago
turboomni

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East of the Equator

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I would tame it with the TX not mechanically. With expo,[ negative for futaba] will tame it down but give you full throw if you get into a desparate situation to save the bird.
I frankly cant imagine a Trex touchy unless you have a setup problem. You sure you set the expo the correct direction?
Setup is everything, All my heli's can fly far better than I can pilot them
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08-01-2007 12:08 AM  13 years ago
balsabasher

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Central Ohio, USA

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Add weight to flybar, lower head speed, and add expo.Blades; what goes around, comes around!
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08-01-2007 04:03 AM  13 years ago
turboomni

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East of the Equator

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Lower headspeed yes,,expo yes,,why flybar weights? I have tried them but took them off and did it all from the TX. Never saw the need. Fill me in.Setup is everything, All my heli's can fly far better than I can pilot them
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08-01-2007 04:16 PM  13 years ago
Edge

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Indianapolis, IN

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Higher HS makes bird "more" stable. Trade off is that it also makes bird more responsive. However, this can be managed by expo giving best of both worlds. A stable bird that is also "calm" in hover, etc.. I would be careful about getting HS too low. You can end up chasing controls when in hover. Think of a bicycle, the slower it moves, the more difficult to keep balanced! Good HS (IMO 2600+ min)is your friend! If you want a real calm bird, don't plug in the battery!
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08-02-2007 05:23 AM  13 years ago
The Daz

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Australia

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longer flybar will make the helicopter more stable around center stick and give more cycic power at full stick!!
shorter flybar will make the helicopter more agile around center stick, with less cyclic power at full stick!!

longer flybar and weights will make it rock solid in hover.

Higher headspeed penetrates the wind better.. and i much prefer a high headspeed even for hovering. especially when your 1 inch off the ground inverted.. you really want it to be stable then
Feed it some nitro!, try not to get bitten..
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08-02-2007 05:27 AM  13 years ago
turboomni

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East of the Equator

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and i much prefer a high headspeed even for hovering. especially when your 1 inch off the ground inverted.. you really want it to be stable then
Like WOW DUDE!!!
Setup is everything, All my heli's can fly far better than I can pilot them
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08-02-2007 05:28 AM  13 years ago
turboomni

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East of the Equator

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AWESOME!!!Setup is everything, All my heli's can fly far better than I can pilot them
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