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Topic: HTR Users - Q & A, General questions thread< Next Oldest | Next Newest >
frednaar
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Posted: Mar. 28 2010,13:19

Hi,
please post here your questions on HTR usage under FSX, how flight dynamics work etc...

Fred


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The maker of Helicopter Total Realism, now working on Airland, a dedicated helicopter sim
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DaiDai
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Posted: Mar. 29 2010,12:58

Hi Fred:

Does HTR use the Blade Element Theory for rotor?

Are there any demo videos on the flight dynamics  (compared with the native FSX FM)?

Thank you
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frednaar
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Posted: Mar. 29 2010,13:49

Quote (DaiDai @ Mar. 29 2010,13:58)
Hi Fred:

Does HTR use the Blade Element Theory for rotor?

Are there any demo videos on the flight dynamics  (compared with the native FSX FM)?

Thank you

Hi,
yes HTR uses blade element theory for main and tail rotor, to calculate thrust, torque, induced velocity, h force.

there are no videos yet, but you can produce record and playback files and export flight analysis to excel sheets.

bye
Fred


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Derk
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Posted: April 08 2010,05:25

Hi Fred,

Is there a way to review what profiles have been released and are currently being developed?

Thanks,
Derk


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frednaar
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Posted: April 08 2010,16:34

Quote (Derk @ April 08 2010,06:25)
Hi Fred,

Is there a way to review what profiles have been released and are currently being developed?

Thanks,
Derk

Hi,
there are a number of profiles being developed or announced,

I will start uploading the final profiles I have received in the HTR downloads section this weekend

The ready profiles I know of are:
- BELL UH1 by Jorge Roldan
- BELL 412EP  by Jorge / Sundog (I am on final testing)

Profiles in development (from messages sent to me, sorry if I forgot someone)
- AS 365 Dolphin by Jorik
- Bell Kiowa by Nick
- Apache by Nick
- AS332L2 by Dirk
- Bell 212 by me
- MD Explorer by me (needs HTR 1.04 to be released for NOTAR physics)

Also do not forget the AS 350 and AS355 profiles that come with the normal 1.02 installation, in addition to the standard FSX helicopters

I will create a new thread on profiles announcements so that people can announce and test new profiles....

bye
Fred


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Derk
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Posted: April 08 2010,16:59

Thank you for your reply Fred.
I'm definately looking forward to the new profiles, especially the one for Dirk's AS332L2, that'll make that terrific addon even better!

Thank you for what you have done for the community and helicopter flightsimulation.
Derk


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heliguy52
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Posted: April 14 2010,00:43

Hi, Fred,

Will HTR work as well with the default Bell 206 for FSX?

Thanks a lot.


Edited by heliguy52 on April 14 2010,00:44

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Obi-Wan
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Posted: April 24 2010,19:41

I've been trying it now a couple times, with the AS350. Took me a bit to figure out that the Elevator axis is reversed  :)  However, there's somethign really odd. Frequently, for no apparent reason it just pitches up (at about 60-70 kts, nowhere near Vne). When that happens I push the cyclic forward and it just doesn't respond. It keeps pitching up. The only way to recover is to pull the cyclic back and perform a back-flip  :D  It's almost like the auto-trim kicks in although it is disabled. Any ideas what migth be causing this? Anyone else having that issue? (Settings are auto-trim disabled and 100% realism. It still occurs at lower realism settings, but not quite as violent).
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frednaar
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Posted: April 24 2010,20:46

Quote (Obi-Wan @ April 24 2010,20:41)
I've been trying it now a couple times, with the AS350. Took me a bit to figure out that the Elevator axis is reversed  :)  However, there's somethign really odd. Frequently, for no apparent reason it just pitches up (at about 60-70 kts, nowhere near Vne). When that happens I push the cyclic forward and it just doesn't respond. It keeps pitching up. The only way to recover is to pull the cyclic back and perform a back-flip  :D  It's almost like the auto-trim kicks in although it is disabled. Any ideas what migth be causing this? Anyone else having that issue? (Settings are auto-trim disabled and 100% realism. It still occurs at lower realism settings, but not quite as violent).

Hi,
about the elevator axis being reversed this is quite strange, the pedals are reversed as it has a clockwise main rotor. I had a similar experience with saitek pedals a few weeks ago but then it was FSX not reading the pedals well...

It is normal for the helicopter to pitch up with speed due to blade flapping, set it to zero on the config if you want the effect to disappear, but what you describe seems different, it looks retreating blade stall.

This can happen at speeds as low as 50 knots depending on weight, altitude and temperature, what conditions are you flying in?

I suggest you flag the display velocities flag to see your current max VNE and flight attitude.

Bye
Fred


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Obi-Wan
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Posted: April 24 2010,22:16

Quote (frednaar @ April 24 2010,14:46)
about the elevator axis being reversed this is quite strange, the pedals are reversed as it has a clockwise main rotor. I had a similar experience with saitek pedals a few weeks ago but then it was FSX not reading the pedals well...

It is normal for the helicopter to pitch up with speed due to blade flapping, set it to zero on the config if you want the effect to disappear, but what you describe seems different, it looks retreating blade stall.

This can happen at speeds as low as 50 knots depending on weight, altitude and temperature, what conditions are you flying in?

Yeah, I'm aware the torque is reversed on the AS350 (which I'm almost more used to since I fly Russian helos a lot).

I'm aware of blade flapping, and I don't think it's retreating blade stall. Winds were abouts 10 kts, temperature and pressure... dunno, whatever it currently is in Honolulu :)  The effect took place at abotu 60 kts, both into the wind and on the return with the wind. Payload weight was just my weight (and I'm a light-weight :)

I need to look at the "display velocity" option and see. What makes this so weird is that the effect gets worse the more I try to pitch forward, to the point where there is no cyclic authority, but a backflip will stop the effect permitting fligth again at about the same speed. It seems the effect can be delayed by making small back and forth movements with the cyclic. Keeping the cyclic constant makes it worse, which is why I though the auto-trim might interfere.

I'll see if I can get some speed data together. Matter the fact, let me start it up right now :)

Cheers!
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Obi-Wan
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Posted: April 24 2010,22:45

Okay, recorded a track for you. It happened again. However, this time was even weirder. With constant forward cyclic, it pitched back until I was inverted. I pulled the cyclic back to complete the loop, and held the cyclic very steady. Next, the helicopter pitched forward, from the inverted attitude back to a normal one. I'm not sure flying inverted for that long is actually doable :)  Since it seems that the elevator axis reversal is not normal and only seems to apply to me, I'm wondering if there is some issue with the controls. In FSUIPC I only have a slight slope (1) on the aileron axis, and a larger curve (4) on the rudder axis, but no slope on the elevator axis. I do have an elevator trim axis assigned, but already tried disabling helicopter trim in the FSUIPC config, which didn't make a difference.

I can PM you the URL for the track (set to debug) if you are interested.

Thanks,
Frank


Edited by Obi-Wan on April 24 2010,22:47
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frednaar
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Posted: April 25 2010,06:31

I suspect is has something to do with FSUIPC, I use the freeware version just for communication not for setting axes and such.

Yes please send me the recording in zip or rar at the email adress on the pdf manual, I ll be glad to check it out.

Bye
Fred


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corbu1
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Posted: April 26 2010,22:31

Hi,
I have a problem with the right size of the htr main window.
I have htr v1.03 (with fsuipc4.6) installed on a notebook with win7 Ultimate 64.
It seems that the htr window shows not all informations, because its to small. Especially in the Air Data Window the last three bottom lines (including the COG) will not displayed as shown in the htr manual.

Does anybody have the same problems?

Best Wishes


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frednaar
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Posted: April 27 2010,08:21

Quote (corbu1 @ April 26 2010,23:31)
Hi,
I have a problem with the right size of the htr main window.
I have htr v1.03 (with fsuipc4.6) installed on a notebook with win7 Ultimate 64.
It seems that the htr window shows not all informations, because its to small. Especially in the Air Data Window the last three bottom lines (including the COG) will not displayed as shown in the htr manual.

Does anybody have the same problems?

Best Wishes

It is probably a font related issue, I can fix it with the next release (1.04 is already out) by adding a font resize button

send me your email and I'll send you a fixed 1.04 version

bye
fred


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nightsta1ker
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Posted: May 03 2010,01:34

I have noticed some unusual behavior in the auto using HTR for the 212 and the Nemeth Huey.  Rotor RPM control using collective seems to be backwards.  Now, due to my little sim pit configuration I built, I have my joystic turned sideways, and had to reverse some settings on FSX to get the surfaces to work right, including the throttle (collective). This would explain why lowering the collective in an auto seems to decrease RPM and raising it INCREASES.   Does HTR use default joystick settings to do its thing?  It seems to.  If so, can I reverse it?

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frednaar
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Posted: May 03 2010,09:36

Quote (nightsta1ker @ May 03 2010,02:34)
I have noticed some unusual behavior in the auto using HTR for the 212 and the Nemeth Huey.  Rotor RPM control using collective seems to be backwards.  Now, due to my little sim pit configuration I built, I have my joystic turned sideways, and had to reverse some settings on FSX to get the surfaces to work right, including the throttle (collective). This would explain why lowering the collective in an auto seems to decrease RPM and raising it INCREASES.   Does HTR use default joystick settings to do its thing?  It seems to.  If so, can I reverse it?

rotor RPM is calculated based on rotor thrust and power required.

Rotor thrust is calculated based on induced velocity (velocity of air through the rotor) which depends also on vertical descent speed. Especially in autorotation all the rotor thrust is generated by the vertical descent, so you should see rotor RPM increase as you descend faster and decrease as you slow down your descent by adding collective. One think I think I need to fix in the formulas (quite complex) is that I get 0 power when collective is fully down (0%) and this I think I need to fix... otherwise until you keep say 10% collective and above,  works fine.

HTR doesn't look at joystick settings any differently during autos, so if you can take off you should also be able to autorotate.

One thing that might happen is if you pitch nose too much down during forward flight autorotations the airflow reverses, your induced velocity goes negative  and you loose rotor RPM (the same that might happen in autogyros) as you loose autorotative power and then RPM.

bye
Fred


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nightsta1ker
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Posted: May 04 2010,01:17

I am a licensed helicopter pilot, so I understand how an autorotation works.  The simple facts for my particular situation (my computer, whatever configurations I have set up, HTR, and add on aircraft) lead up to a very unrealistic autorotation, almost uncontrollable.  The 212 is better than the nemeth huey.  Something is seriously wrong there (with the ND Huey) and I don't even have a clue where to begin.  But even with the 212, I find myself chasing the rotor rpm from one extreme to the other.  I can get it on the ground, but if it were a real 212 the rotor system would be shot to ####.  In a real helo, very small inputs are required to put the aircraft into, and maintain an autorotation.  In my particular case, the aircraft does not respond to small inputs, and when it finally does respond, it overreacts.  Not sure what the problem is, but I am pretty sure it is not my proficiency at autos, I can kill the engine on the DODO and put it in a compact parking spot at the mall (not really, but you get my point).  Maybe it has something to do with conflicts between whatever HTR is doing and whatever code the designer has in the .CFG file?

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"No sh!t there I was... inverted with a sling load... Air Medals dangling in my face... taking head shots out the window with my 9mm... couldn't push the pedals because the chin-bubble was full of grenade pins..."

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nightsta1ker
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Posted: May 04 2010,01:20

By the way, I am not knocking you, or your program, just trying to make a good thing better.

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frednaar
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Posted: May 04 2010,13:01

Hi,
I understand no problems, I consider HTR a physics engine, the configs can change almost all of the behaviours from sensitiveness to roll pitch moments and such.

What you describe does not correspond to a normal experience with HTR, which is normally quite smooth, also autorotations are really easy if you know how to do them.

It seems to me there's a communication problem between HTR and FSX possibly due to FSUIPC.

Please try do do a recording of your flight in debug mode (max 1 minute, it becomes a big file...) where you experience that, and send it to me zipped or rar-ed.

Also please try:
- fly just using the keyboard... see if it is a joystick problem.
- maybe try on another PC ?
another user had a problem with an heavily modified pay version of FSUIPC, it ended up it was a communication problem.

Hope this helps
Fred


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nightsta1ker
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Posted: May 05 2010,00:25

Thanks, Fred, I will try a few things.

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