RunRyder - Elevator Cyclic Slop

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 660 ONLINE 38 EVENTS SEARCH REGISTER START HERE

2 pages [ << < 1 ( 2 ) > >> ]

1206 views

POST REPLY

Advantage Hobby	.	Revolution Models	.	CarbonXtreme
	.		.

e-Align T-REX 450-500-600 > Elevator Cyclic Slop

Jarod
Veteran
Location: USA

I should point out that I think this applies to Futaba. JR radios use expo in the other direction. Well at any "rate" no pun intended.

He explained to me and a small audience of nay sayers that you dont want expo he insisted that you should only use as a last resort. Instead you adjust the low and high ATV's. High would be for example 100, low rates would be maybe 40 or 35. It would still make the sticks stay calm no twichyness. There just no more delay in the response you give. The expo makes you over correct more then neccesary he said.

01-10-2005 Over year old.

Talon22
Heliman
Location: Colorado Springs, CO

I agree with Jarod that -30% expo is way too much. I use 75% rates and -10% expo for hover and it works great. I should probably take the rest out for a better hover. Expo is just taking the precision out of your hover while the swash is close to center.

01-10-2005 Over year old.

elco
Senior Heliman
Location: Arcadia, CA

OK, I just tried hovering in the garage with my cyclic ATV set to 50% and no expo. So far I like it. It hovers really smooth. It's really easy to keep it in a "small box". I'll have to wait until it stops raining before I can see how it does in 3D. Hovever, I think this might be a good mindset to get into. Use minimal expo and adjust ATV until you get a balance between twitchiness and a good solid feel with a decent roll speed.

Cheers,

elco

01-10-2005 Over year old.

Bushy
Veteran
Location: Tucson, AZ

Vxb.com has 5x8x2 or 5x8x2.5 mm flanged ball bearings to replace the bushings.

Dave

01-10-2005 Over year old.

Jarod
Veteran
Location: USA

Elco thanks for trusting me on this

I knew somone would try it and then post that it helped out. Wait until you take it outdoors. Hovering in one spot stationary is cool but now go fly it. Mine is quicker into the turns and quicker out of them. I have been using expo in my radio for over 4 years. Everyone uses it. There should be more documentation posted on what its really there for. Elco thanks for trying it. Im glad you posted your positive results im sure others will reluctantly give it a try as I did. You will see you have more precice control of the heli without over correcting. It makes hovering easier too. The elevator slop really isnt that noticable anymore. It might be because the servos are holding the control linkages better rather then trusting it to return to 0 all by it self?

01-10-2005 Over year old.

Jarod
Veteran
Location: USA

Radio Setup help for 9CA radios

Powerdrum wrote on 01-10-2005 08:29 AM:
Hi Jarod

Jarod I have a Futaba 9C Heli radio and Im new to setting it up could you tell me what your settings are on your radio so that I can at least hover my Trex450x without it going everywhere.

Thanks alot!!!!!!

Ill post the answer to your question in the thread as it will probably benefit a few people.
How to set your 9CA Futaba radio for dual rates:

1. holde mode/page until you enter basic menu
2 . select *D/R, EXP
3. change the D/R value to 50. Thats what im reffering to when i say ATV rates.
4. Setup low and high rates now and assign them to the switch you want. Or just keep the default assignments. You dont have to assign a letter since one if already assigned. Just note it so you know what switch it is. Also make sure you decide on switch position. I like to have dual rates on with all my switches flipped away from me. Thats my personal preferrence. I think I might be backwards from the rest of the croud on that? It doesnt matter as long as your comfortable with it. IF your still unclear refference the manual of the radio. You can proabably even download the manual from futaba if you need it. Hope that helps you.

01-10-2005 Over year old.

elco
Senior Heliman
Location: Arcadia, CA

Are talking to youself again Jarod?

I don't see a Powerdrum here.

Cheers,

elco

01-10-2005 Over year old.

Jarod
Veteran
Location: USA

there better? I put his question in my responce. I dont think he would mind. lol, hey all this heli stuff is getting my mind spinning sometimes, "drumroll"

Hey Bushy are you going to order those flanged bearings? If they work out it would be a great help. Keep us informed how it works.

01-10-2005 Over year old.

jensenflemming
Heliman
Location: Aarhus, Denmark

Expo sucks

Hi Jarod and thanks for the advise.

I tried my new T-Rex sunday with -32% dialed into my FC-18 tx on cyclic. It moved around and I couldn't keep it in one place.

Each time I corrected the helis movement I would over compensate!

After reading your post - i removed expo and adjusted the range to 50%. That made a big difference! But not enough authority.

Now I am using 75% ATVon aileron and 90% on elevator.

It now feels much better than with the expo.

(This is my first heli and I have only been flying in the sims until now)

Now I have to solve the tail-wagging with the Align 6g servo + Zoom gyro in HH mode...

Love this forum!

T-Rex 450XL CDE & 450X V1

01-10-2005 Over year old.

Jafa
Elite Veteran
Location: Sydney, Australia

There's nothing wrong with using expo - it has the same effect as setting a D/R of 50 without limiting your total range available

If you've set your heli up with a lot of cyclic for 3D, it becomes twitchy and hard to hover nicely, the expo around the center gives you fine control over the inital cyclic movements

Lepton | TRex600Nitro | Sceadu | Freya | Avant | Predator Carbon Max

01-10-2005 Over year old.

Jarod
Veteran
Location: USA

Quote
There's nothing wrong with using expo - it has the same effect as setting a D/R of 50 without limiting your total range available

I dont like saying something is wrong but that statement is incorrect. I will help explain. Expo deadens the sticks so to speak. The control rates do not move smoothly through a linear curve. With expo its slows the input. By lowering the ATV rates and not using expo you avoid the controls being slow in the center and fast as you increase your input. For helis you dont want delay in your inputs. Expo simply delays the input causing it to move the servo more smoothly but not consistently throught the whole travel range. You want the travel rate to remain constant not slow in the center and fast at the outer range. I was doing it wrong for 4 years until this Sunday. It really made a huge difference. Dont be scared to lower your ATV to 40 and add +20 expo on the cyclic. It will be going from driving a Cadillac to a driving a Ferrari. I also recommend using the dual rates for aerobatic flying try using 75 atv and 0 expo. Even if you dont want anythign more then simple straigh sport flying it will increase your ablitiy to control the helicopter. It wont be twitchty or hard to control. Just the opposite. I would have never beleived unless Larry the Futaba sponsored heli pilot setup my radio for me. He does this for a living and has nearly a decade of flying helis. He has been pro for years and travels to the meets. Lucky son of well we wont say it here. I believe him and I noticed a huge difference in how well my flying is now. I guarantee anyone who does this will agree. If not I will hit you over the head with a book.

01-11-2005 Over year old.

vinrx7
Veteran
Location: Americas finest city

has anyone tried using expo with D/R set around 40-50? Just wondering what the results are with using both. Maybe it would be going overboard.

STUPID TREE!!!

01-11-2005 Over year old.

HOMEPAGE

Jafa
Elite Veteran
Location: Sydney, Australia

Yes, expo has the effect of slowing the feel of the input - but that's not how it works - it reduces the amount of servo travel around the center of the stick, this gives you more granularity of control - exactly the same rate as reducing the ATV/DR where each mm of stick movement is now a lesser amount of servo travel (splitting hairs possibly)

I agree that when using expo you do get different rates, the center feels slow and feels like it gets much quicker with larger stick inputs - some people hate it, some people deal with it

The main point is that expo does not rob you of total throw - and gives a bit of finesse to a twitchy machine around the center of the sticks

Lepton | TRex600Nitro | Sceadu | Freya | Avant | Predator Carbon Max

01-11-2005 Over year old.

Chaisit
Senior Heliman
Location: Thailand

I'm totaly agreed with Jafa on the Expo, for me still in hovering state and will be in forward flight soon. I love to use expo instead of DR and still setting it in negative value. I still believe that the negative value of expo will be keep my rexxy stable in hovering. Now i'm using expo = -20 and feel it's OK however i'll try it on +30 and see.

01-11-2005 Over year old.

2 pages [ << < 1 ( 2 ) > >> ]

1206 views

POST REPLY

Midland Helicopters	.	HeliProz	.	ZoomsHobbies
	.		.

e-Align T-REX 450-500-600 > Elevator Cyclic Slop

UPDATE SCREEN PRINT TOPIC

Advertisers

Subscribe to This Topic