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Mikado Modellhubschrauber . GrandRC . CanoMod

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Computer Flight Simulators > Reflex lower piro rate?
 
 
w.pasman
Elite Veteran
Location: Netherlands

Which setting do I have to change to lower the piro rate?

I want to have the same piro rate as on my real machine and want to use the same Tx program both for my real machine and for reflex. So I have to adjust reflex, not the Tx.
05-08-2008 09:56 PM
HOMEPAGE  
 
 
nheather
Veteran
Location: Horsham, West Sussex, UK

No expert but I would suggest one of these (or combination)

1 - Lower Tail ATV (in sim or on your transmitter)
2 - Lower Tail Rotor RPM (in physical parameters)
3 - Lower Left\Right pitch travel (in physical parameters)

Cheers,

Nigel
05-08-2008 11:04 PM
 
 
MJA
Key Veteran
Location: Cumbria-UK

Press F5 and lower "tail rotor efficiency" from 100%
Save the model with an ammended name and repeat process for any of the other heli's



Martin
05-09-2008 01:35 AM
 
 
pH7
Key Veteran
Location: Sterling Heights, MI - USA

If all the models you fly are too fast, then lowering the ATV in your transmitter will fix them all, so option 1 is good. If it is only on a few models, then any of the other suggestions will work.
05-09-2008 01:44 AM
 
 
nheather
Veteran
Location: Horsham, West Sussex, UK

What head speed do you use on your real heli. If you are flying with wooden blades then the manufacturer instructions recommend around 16,000 rpm. Most sports fliers with man-made blades will fly at 18,000 rpm at least.

Since the tail is just geared down from the head speed this means that a slow head speed will mean lower piro rates. I suspect this is what you are seeing with your real heli.

I don't think that Reflex models this relationship and instead lets you set the head and rotor speeds independently. In this case the reflex model probably has a high tail speed than your real model - hence my suggestion number 2.

If this has the desired effect you may also want to look at the Reflex model head speed as this is likely to be higher than your real model.

Cheers,

Nigel
05-09-2008 08:26 AM
 
 
w.pasman
Elite Veteran
Location: Netherlands

Thanks, going to try this tonight

Is there really a "Tail ATV" on the simulator settings? This was what I was looking for but could not find it. Of course it's on the Tx but dont want to change that (see my first post).

Tail rotor RPM and efficiency can not be lowered, the sim heli would start weathervaning which the real one does not.

I'm flying just 1 model

I'm using 2000+ on the head, that makes about 17000+ on the engine. But I'm pretty sure that the piro rate of the real machine is governed by the (HH) gyro, not by the engine rpm.
05-09-2008 12:33 PM
HOMEPAGE  
 
 
nheather
Veteran
Location: Horsham, West Sussex, UK

Quote 
pretty sure that the piro rate of the real machine is governed by the (HH) gyro, not by the engine rpm.

Not entirely.

The piro is determined by two things

(i) Pitch of the tail rotor blades
(ii) RPM of the tail rotor blades

The Gyro does have some same on (i) but so does ATV and how much rudder you feed in.

The tail rotor RPM is determined by a fixed ratio off the engine.

I can't tell for sure about soft ATV - I don't have Reflex anymore so altough I can run the application, the transmitter settings don't show up.

I would have thought you could do something in 'assign channels' (F7), but perhaps I'm getting to used to Phoenix.

Cheers,

Nigel
05-09-2008 05:02 PM
 
 
w.pasman
Elite Veteran
Location: Netherlands

OK Let me back up my statement about piro rate. From the CSM360 manual:

Quote 
system the rudder command from the pilot is interpreted as a request to the gyro
to establish the desired yaw rate. The gyro drives the tail rotor servo as needed to obtain this yaw rate.

Of course pitch and RPM are requirements to reach the requested yaw rate but it's the gyro that governs.

I found the tail ATV, it's called "pitch travel to left" and "pitch travel to right". However I already tried that and it's just the limit of the travel. The heli will still piro too fast if I lower it, and also it may start to weathervane.

There is also a 'sensitivity' value but I'm not sure what it does, but not what I need... The 'assign channels' only assigns and sets polarity of channels. The 'calibrate' only sets the center.

Starts to look like this calibration is not possible
05-09-2008 08:25 PM
HOMEPAGE  
 
 
MJA
Key Veteran
Location: Cumbria-UK

Did you try what i said.Hopefully it shouldn't effect the gyro/tail hold and just reduce the piro rate to stick input.But as i don't have a stereo to phono converter lead at the moment i can't try it with my DX7.I have sold all my Futaba radio's as well so can't try the sim with those either.
This extract is taken from reflex's own help docs so tail rotor efficiency should work just to reduce the piro in isolation

<<<
Swash plate travel
Tail rotor efficiency
Lift performance
Gyro sensitivity
These parameters refer to the overall reaction to an input. Basically, if you feel that the model reaction to some inputs is too "hot", you may decrease values from 100% to 70% which corresponds to a modified servo travel. If you want to increase the motor performance you may increase the lift from 100% to 130% simulating a hotter engine.
>>>

Martin
05-09-2008 10:36 PM
 
 
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Computer Flight Simulators > Reflex lower piro rate?
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