RunRyder RC
WATCH
 1 page 1337 views POST REPLY
HomeAircraftHelicopter
e-
Align
T-REX 450 › Hover Stability
01-24-2010 12:37 AM  8 years agoPost 1
heliflyer7

rrVeteran

North Carolina

My Posts: All  Forum  Topic

I am in the test flying and final tuning stage of my new 450 Pro. Tail rotor linkage and gyro setup was a bit tedious, but everything is locked in nicely now. I have a little expo (12%) elev. and aileron and it controls positively without being too touchy. What I'm wondering about is how much it moves around, even in a slight breeze. Prior to this I've flown .30 nitros and my Hirobo Sky Robo. I realize it is still a relatively light machine but thought it would feel a little more "solid" in the hover. All controls and linkages are tight and it was setup using Ron Lund's flybar lock and swash alignment tool, there is no control interaction whatsoever. If this is normal, I can live with it. Just wondering what others experience with this size machine has been. TIA, Jack

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 12:44 AM  8 years agoPost 2
NQNA

rrElite Veteran

USA

My Posts: All  Forum  Topic

What head speed are you running. If it slips into the 2400 range they feel like mush. I run 3200 to 3300 min for Idle-UP and it will definitely feel more locked in. You will never have quite the same locked in feeling as you move smaller and smaller in helicopter size. Fly your 450 for a while and you will just be that much better of a pilot.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 01:32 AM  8 years agoPost 3
heliflyer7

rrVeteran

North Carolina

My Posts: All  Forum  Topic

Thanks NQNA. Have not tached rotor, but you may be on to something, as my run times don't seem that long even with a 2550 ma batt. I understand lower rpm = lower efficiency, so I'll bump up my throttle curve in the hover range and see what happens. Agree on the better pilot aspect, most definitely have to be constantly on top of it!

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 01:40 AM  8 years agoPost 4
Zaneman007

rrElite Veteran

Texas - USA

My Posts: All  Forum  Topic

A 450 does not and will not feel and fly like a 30-50 nitro or even a 500 sized electric. Run times for anything other than just hovering should be around 4.5 minutes. Increasing the head speed will give you a more solid hover, but... you may have to add a little more expo.

Old Guys Rule!

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 01:47 AM  8 years agoPost 5
heliflyer7

rrVeteran

North Carolina

My Posts: All  Forum  Topic

Thanks Zaneman, am definitely planning on bumping up headspeed. Is good to know that the instability is a function of size more than anything.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 03:51 AM  8 years agoPost 6
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Been Their !
I have a pair of gasser's a heavy R.52 and a smelly R30.

None of them feel like the 450 but I'm getting mine closer to something under my . 52 and closer to my .30.

Nasty ground effect as the column of air is so small - take off or ?? as I call it {pop up is ok} but can't do low hovers. Need's at least 3 ' to start calming down. When you think about it that little column, battery and all, is pushing up some pretty good weight. " Hence the head speed" It's the May Tag Washing Machine effect.

Head speed is part of it - boot it up. I'm at around 25% Epo { which is oK } for obedience training but then the feeling just then get's like crap because I don't like the masking effect - ---- I believe shouldn't need it if you like positive mechanic's. You can always dial down the cyclic throw's.

It's definitely - a bit of going back into the head and start messing with flybar / paddle weights but I haven't had the time to get to it.

I'm running a solid black Poly paddle. I hope to add a set of weights to the fly bar // move them all the way in the to the cage // and start testing. Once I find the sweet spot I'll start backing out the Expo hoping to get rid of most of it.

I'm not at all worried about slamming the cyclic around with the little Mg's ger -ranimal servoe's I got. I just got to find the smooth feeling - then I'll starting adding to the blade collection

Part I'm trying to sell my self is the guy's that are running a straight line throttle curve from the get go - sound's Nut's to me - but it does make a little bit of sense.

On mine I cross 0 pitch at around 80% and hover at + 4 at around 85% and then leave the top open to 95%.

Scare y little gnat' s though landing. That's a Align for ya.

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 04:46 AM  8 years agoPost 7
NQNA

rrElite Veteran

USA

My Posts: All  Forum  Topic

Too much expo will make you fly sloppy also.. you move the stick.. nothing happens..

it's a fine balance of individual control touch.. reflexes ..and eyes to see the fine trends or changes in motion and then smooth control response to correct..

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2010 05:16 AM  8 years agoPost 8
heliflyer7

rrVeteran

North Carolina

My Posts: All  Forum  Topic

Thanks to everyone for your input. Helis are such a great challenge, but so incredibly rewarding when you get it right. I enjoy the tweaking as much as I do the flying. I must, as I do a lot more of the former than the latter :-)

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1337 views POST REPLY
HomeAircraftHelicopter
e-
Align
T-REX 450 › Hover Stability
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Monday, October 15 - 8:49 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online