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06-08-2012 02:54 PM  6 years agoPost 1
HeliNutAndy

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worcester, MA USA

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Hello,

I am fairly new to R/C helis and have a question. I have a Trex-450 clone that when I start to spin the main blades the helicopter seems to push down word until I keep increasing the throttle and then she lifts off. I have a DX7s radio. What do I need to adjust?

Thank You

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06-08-2012 03:20 PM  6 years agoPost 2
eyefly3d

rrApprentice

magnolia tx

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Sounds like you need to adjust your pitch curve. Remove some of the negative pitch on your lower throttle settings. If you have your idle up modes set then set your normal curve for take off and landing and you can switch to idle up once airborne. I'm not familiar with the dx7 so I can't help with the exact way to set them up. I run about negative 3 degrees on my normal curve and have 0 degrees at half stick.

I don't always fly helis, but when I do I prefer to fly scale.

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06-08-2012 03:26 PM  6 years agoPost 3
HeliNutAndy

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worcester, MA USA

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Sounds like you need to adjust your pitch curve. Remove some of the negative pitch on your lower throttle settings. If you have your idle up modes set then set your normal curve for take off and landing and you can switch to idle up once airborne. I'm not familiar with the dx7 so I can't help with the exact way to set them up. I run about negative 3 degrees on my normal curve and have 0 degrees at half stick.
Thank you for the help. I am not familiar with curves or most of the lingo yet. I will try to google it and figure it out. Thx again.

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06-08-2012 03:27 PM  6 years agoPost 4
MichiganFlyer

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Lansing,MI

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He does need to adjust his pitch curve. 45-47-50-75-100 is what you need your pitch curve at. Anything under 50 is negative pitch used for inverted flight.

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06-08-2012 03:29 PM  6 years agoPost 5
JasonJ

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North Idaho

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In the pitch curve menu on you radio you will see that it says 0-25-50-75-100 under normal mode. Change it to something like 40-40-50-75-100 and that should work better for you.

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06-08-2012 03:58 PM  6 years agoPost 6
HeliNutAndy

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worcester, MA USA

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Awesome. I am so excited to go home and try the settings. I am at work right now

Thx again.

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06-08-2012 04:31 PM  6 years agoPost 7
MichiganFlyer

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Lansing,MI

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Just so you know, You can curve your thottle channel too. A 0-40-65-65-65 keeps your head speed low and doesn't make the heli pop up as much when increasing cyclic. 65 on the curve is a reference point. You may adjust this number up if you think you need more headspeed or down for less head speed. A constant head speed is better than the up and down that cyclic and rpm increase and decrease does. Once you are comfortable at 65(or the percentage you choose) increase this 10 at a time. Your heli will react a little faster and you will get a little faster on the sticks.
As you increase your head speed you have to react a little faster.
Going from 65 to 85 on the flat thottle crve can happen in a few packs or it can take a bunch of flights.
Use a head speed that makes you feel comfortable to learn.
I was scared when I would give to much cyclic and the heli would pop into the air and the headspeed would increase.
A constant headspeed is going to make you more comfortable on the sticks and make learning alot easier.

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06-08-2012 05:59 PM  6 years agoPost 8
HeliNutAndy

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worcester, MA USA

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I have been spending a few hours a night on Pheonix in hopes to get used to any 'awkward' moments. I also noticed flying the flybarless helis on the sim seems much easier and as a learning tool I may purchase a Blade 450X this weekend to go along with my Trex 450 clone. I am so excited to try these ideas that you guys have given me. Thx again.

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06-08-2012 07:45 PM  6 years agoPost 9
mr dan

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Stockton Calif

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Just randomly adjusting the pitch curve without knowing what the actual pitch is on the blades seems feutal. He needs to have a pitch gauge to determine the pitch at zero collective, mid and full collective, It may be best to walk him through the process since he is new to this hobby. Who knows at this point, he may have some excessive negative and positive pitch ranges, for a 450 -4 +12 would be a good starting point for normal flight mode, and +/- 12 in
stunt 1&2 (idle up mode) . Point is he needs a pitch gauge to start off with first.

One other point. How do we know he is not starting in stunt 1 or 2 mode with the hold switch prior to spool up? this would cause the helis mains to pull down too.

"R.I.P Roman" Citizen 0094 in the Nation

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06-08-2012 08:12 PM  6 years agoPost 10
HeliNutAndy

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worcester, MA USA

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The heli(Hausler 450 SE V2) came with a cheap radio/receiver. It didn't have the downward force issue when I was using this radio. It only started when I swapped the receiver for a new Spektrum 8 channel receiver. I don't know if this helps....

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06-08-2012 08:18 PM  6 years agoPost 11
mr dan

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Stockton Calif

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The heli(Hausler 450 SE V2) came with a cheap radio/receiver. It didn't have the downward force issue when I was using this radio. It only started when I swapped the receiver for a new Spektrum 8 channel receiver. I don't know if this helps....
Yes it does!
You need to go through the setup again, starting with centering the servo arms, then leveling the swashplate from bottom collective to top end collective. Once this step is completed, you then need to setup your pitch ranges, determine what the totals are in both normal and stunt 1&2 modes then adjust as to your needs. You will need a pitch gauge.. do you have one?

"R.I.P Roman" Citizen 0094 in the Nation

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06-08-2012 08:36 PM  6 years agoPost 12
HeliNutAndy

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worcester, MA USA

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You will need a pitch gauge.. do you have one?
No. I do not. Looks like I will be shopping this weekend

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06-08-2012 10:44 PM  6 years agoPost 13
Jgatorman

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Birmingham, AL

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I would suggest slowing down competely for the Op. You sound as if you are very unfamiliar with this hobby if you are spinning up the blades without even understanding pitch or throttle curves. Not to be a downer but these things bite and even a 450 get bite you bad enough for a long hospital stay.

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06-08-2012 10:55 PM  6 years agoPost 14
HeliNutAndy

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worcester, MA USA

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I know how to hover and perform some basic moves. Thank you for the concern but I do not plan on slowing down. I never spent the time to learn the mechanics etc. I am a software engineer by trade and I am confident that I can get up to speed quickly I just never did my homework. The sport lured me in with RTF's and now I am ready to do my homework.

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06-09-2012 12:44 AM  6 years agoPost 15
Gyronut

rrProfessor

Martinsville In.

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Best of luck to you..............

Rick

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06-09-2012 01:08 AM  6 years agoPost 16
SGM Retired

rrApprentice

Toney, AL. USA

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+1 on jgatorman statement. Understanding how things work via the Tx to Heli can help these guys on the forum help you down the road. I'm sure you will need help and this is the place to ask the questions. It helps though to be able to answer them with correct info or they could give you some settings they think is correct for your situation but in turn comes out bad because you did not tell them the rest of the story. Just my 2 cents, hope you get it figure out and have a fun flight.

Trex 500FB Trex 600ePro McpX. Synergy E7SE

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06-09-2012 04:04 AM  6 years agoPost 17
HeliNutAndy

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worcester, MA USA

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I appreciate all and any help that people have given me. I want nothing more than to master the sport and for some reason I got the bug. I had a Nexus 30 about 12 years ago and hovered for about a month and gave up. For some reason with the advent of the Sim technologies and cheaper costs I am enjoying myself again. I would love to dial in my radio perfectly but I am still figuring things out.

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06-09-2012 04:13 AM  6 years agoPost 18
MichiganFlyer

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Lansing,MI

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Andy,
I am a year into this hobby and still learning at a rapid rate. There is so much to learn. And alot of it isn't handed to you with a manual. You kinda have to figure it out. Challenging at times but rewarding in the end.

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