RunRyder RC
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 1242 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Multiple Forward Flips
04-23-2009 04:41 PM  9 years agoPost 21
click

rrNovice

UK

My Posts: All  Forum  Topic

I have associated that behaviour to the way gyro compensate for the... not sure what... LOL

When I do back flip (360) half way through it nose goes to the right (helicopter's right, my left - while in nose in inverted). When set as good as I can (it's 401 on MT with S9257) it manages to compensate variations in HS and when I finish it - it is at right place. If not set properly - then slightly to the left (nose).

In forward flip - it goes to the left while ending flip with nose slightly to the right.

In stationary roll to the left - I end up with tail to down. In stationary flip with tail slightly up (nose down).

And all these - less vibrations I have, higher HS is, less bogging through the manoeuvre, very little slop in tail, fast servo - less I notice this happening. The moment I lower HS, tail gets worked out (slop appears) - it starts being more visible...

Is it the same thing, maybe?

I am flying thumbs but Mode 1 and I tried with lots of EXPO (started with 15-20% and gave up when set more than 50%), had people standing next to me watching my thumbs, deliberately adding negative expo to expose it even more and nothing changed (higher HS, more silicone grease on tail, tightened parts that introduced slop up to before tail wagging helped more)

PM  EMAIL  Attn:RR  Quote
04-23-2009 05:54 PM  9 years agoPost 22
TJinGuy

rrProfessor

Socorro, NM - USA

My Posts: All  Forum  Topic

It just comes down to you being able to make small adjustments throughout the maneuvers. There is no such thing as a perfect heli or perfect flying conditions (wind, thermals and such). So you have to compensate. I would assume that doing the moves in stages would allow you to learn how to adjust things as you go. So flip it forward and make a single calculated adjustment to get it level again. Flip it back over and adjust again. Rinse and repeat. Soon you will be able to adjust on the fly, per se

- Chris

Team New Mexico
TJinTech

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-24-2009 01:08 PM  9 years agoPost 23
Nashville

rrElite Veteran

Formerly Music City now back home in Sunny Florida

My Posts: All  Forum  Topic

I agree with TJinGuy. Multiple stationary (low or not) flips/rolls are difficult (especially smooth ones). Took me forever to get decent at them. As I got better at inverted hovering and flight it became easier as I can now correct when upright or inverted. I have helis that are set up great and a beater or two that I really don't spend a lot of time on and I roll and flip just about the same on both. It almost always boils down to the pilot in my opinion.

I was Spektrum when Spektrum wasn't cool

PM  EMAIL  GALLERY  Attn:RR  Quote
04-24-2009 11:27 PM  9 years agoPost 24
tchavei

rrProfessor

Portugal

My Posts: All  Forum  Topic

Interesting nobody has mentioned phasing yet... an offset of just 1 deg will do exactly what the OP stated... the tail won't be aligned with the heli's initial position. On the other hand, having a tail problem (not holding properly) will appear as a corkscrewing flip ie the disc will appear more and more out of the horizontal position on each half flip.

Bottom line:

Tail out of alignment = phasing

Disc out of alignment = tail/gyro

Tony


--------------------
"Perfection and patience usually walk side by side..."

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-25-2009 12:41 AM  9 years agoPost 25
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

Agreed, BUT I'm also thinking it may be due to gyroscopic precession errors as a result of the way in which the gyro is mounted. I had similar problems a few years ago on an SL720 in a very rigid carbon framed heli. There were some issues with hammer blows from hard cyclic inputs and the vibes were being transmitted to the gyro with the result that in simple roll and flip manouvers, the gyro was being upset.

Vegetable rights and Peace

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 1242 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Multiple Forward Flips
 Print TOPIC  Make Suggestion 

 15  Topic Subscribe

Monday, December 10 - 7:29 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