RunRyder RC
WATCH
 1 page 1115 views Post Reply
Home🏆Contest✈️Aircraft🚁Helicopter🏆Aerobatic 3D Contest › tailslide terminal speed
07-19-2006 02:25 PM  14 years ago
Topic Vote0Post 1
helihobbit

rrApprentice

Dublin, Arizona

MyPosts All Forum Topic
tailslide terminal speed
my nerves are playing me up. I'm afraid to drop it for more than 3 or 4 seconds - seems like an age. Which of you experts have maxed out on this manoeuvre, like can things go seriously wrong if the speed gets too great? So will it go out of control as distinct from the pilot losing it? I have a feeling nothing stresses the bird more than this move - is that correct? so what do you think the max speed would be compared to FFF or even a fwds vertical dive?
SHARE  PM  EMAIL  Attn:RR  Quote
07-19-2006 04:33 PM  14 years ago
Al Austria

rrElite Veteran

Sacramento, CA - USA

MyPosts All Forum Topic
It's not that bad. Make sure your gyro setting are optimized because when you pull out you will loose some head speed and the tail might want to kick out(if it hasn't already on the fall!!).
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 05:35 PM  14 years ago
w.pasman

rrElite Veteran

Netherlands

MyPosts All Forum Topic
Check it on sideways terminal speed first, that is the point where maximum load will be on the tail. I would not even try tail slide at terminal speed if it does not hold on sideways terminal speed.

I don't think I have ever done more than 3 seconds sideways fall. Heli would become barely visible at the height required for that...
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-19-2006 06:35 PM  14 years ago
FLYINFOOL

rrKey Veteran

Cudahy, WI

MyPosts All Forum Topic
Nose down will be your highest terminal speed due the better aerodynamics.
In a tail slide the canopy acts like a parachute and slows the heli down.
In sideways fall the drag of the whole side of the heli is a lot and really slows it down.

Make sure that your blades are tight in the grips if you plan a hard inverted pullout from a tail slide to avoid a boom strike.

Other than that the only issue is the possibility of the tail blowing out.
Jeff Borowski
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-30-2006 08:12 PM  14 years ago
robhurlin

rrKey Veteran

Pretoria, South Africa

MyPosts All Forum Topic
... because when you pull out you will loose some head speed ...
I don't get it. The heli is falling fast (usually at zero pitch). When you pull out it slows down and the disk absorbs that energy and the head speed goes up. At least it does with me. I usually pull out at zero pitch and then apply positive or negative depending on whether I pulled out upright or inverted because the sudden flow through the disk slows the heli down but speeds the disk up. I suppose an abrupt pull out using pitch to stop the fall of the heli would load it up so I guess it depends on style!
Rob.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-15-2006 06:43 AM  14 years ago
Hummingbird3D

rrVeteran

California

MyPosts All Forum Topic
But from anyone who has done or seen many tail slides, how does the heli move during the "tail blow out"? I here that phrase a lot but I haven't heard of a description of what really happens in this situation. Does the heli move 180 degress, 45, what???

And, does it mean that something is now broken or that the heli can't be recovered in the air?
Fly It Like You're On The Simulator!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-15-2006 08:32 AM  14 years ago
w.pasman

rrElite Veteran

Netherlands

MyPosts All Forum Topic
But from anyone who has done or seen many tail slides, how does the heli move during the "tail blow out"? I here that phrase a lot but I haven't heard of a description of what really happens in this situation. Does the heli move 180 degress, 45, what???

And, does it mean that something is now broken or that the heli can't be recovered in the air?
Blowout causes an uncontrollable pirouette.
Nothing breaks, assuming you don't crash because of that piro.

I have not had a blowout on tail slides but I had on backwards stallturns

This happens when the tail rotor is just barely strong enough to keep the tail fixed when the tail is straight into the wind (downwards when you do tail slide).
Now, if you don't have the tail exactly straight, the tail rotor can't keep up and the tail fin will push the tail around, against all effords of the tail rotor to keep the tail into the wind. Because the force on the tail fin grows very fast as the tail gets out of the straight, the heli will not give a sign of impending turn but turn around very abruptly.

Because the tail rotor is so weak, the turn will be almost 180 degrees. Depending on the gyro, the heli may make feeble attempts to return the tail in the wind or just keep 180 degs rotated

If you do backward stall turns, the tail is into the wind but additionally you are pulling up hard, bogging the engine a bit. This will decrease the tail rotor power while the speed is increasing. In this case the piro may be only partial, because as soon as the tail gets out of straight the air speed will break, enabling the tail rotor to recover. This may cause a kind of wobbling piros back and forth, together with funny engine sounds
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-15-2006 01:55 PM  14 years ago
Havoc

rrElite Veteran

Ky.

MyPosts All Forum Topic
Most helis rotate nose left if something happens to the tail. It depends on engine rotation but all the helis I see around here will nose left. I had a bearing fail in the tail grip during a backward loop that caused it to kick 90 degrees twice before the loop was complete. So it can happen at any time even with a good setup. It took me several flights before I traced the problem to the grip bearing. With tail slides, the modern gyros wants to do it for you when setup right.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-16-2006 12:25 AM  14 years ago
Hummingbird3D

rrVeteran

California

MyPosts All Forum Topic
I have not had a blowout on tail slides but I had on backwards stallturns
Mine are the opposite, maybe when I do backward stallturns they are much slower; I know that when I do tail slides the heli comes down fast and it was one time when I wanted the slide to come sort of close to me on the pass that the helis tail flipped around 180 degrees on me - that was enough of sign for me to stop for the day.


On a knife edge I haven't had any problems (left or right) with the tail holding, infact I think this is a safer move for one to try.
Fly It Like You're On The Simulator!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1115 views Post Reply
Home🏆Contest✈️Aircraft🚁Helicopter🏆Aerobatic 3D Contest › tailslide terminal speed
Print TOPIC

 4  Topic Subscribe

Thursday, June 24 - 4:27 am - Copyright © 2000-2021 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online