RFX features questions

Fly_electric

Well-known member
Have not as yet upgraded to the high HP PC RFX requires, so here are a few questions for those who are able to run the new version:

E-power:
1. In the real world, pilots use a down counter. Does the stop watch now support both up and down counting?
2. Pilots do not fly the packs to zero volts, but to a settable safe Low Voltage Cutoff. Are there now ESC settings available such as LVC, action to take (stop, reduce throttle input, etc.)? Can better approximate flight times by making custom cells with adjusted capacities, but that should not be necessary.

Launches
3. In RF 7x hand launches seem to be set at about 25mph. In the real world, if a plane is launched with an upward toss (as I'll have to learn with the FBW), the launch speed is much lower, with flight speed being essentially being achieved by the prop only. RF 7x has no settings to change the hand launch speed (that I've found anyway). As the FBW has no airfoil, it will take some second or so to reach flying speed from such a slow launch, and was hoping to be able to duplicate it in RF.
4. Ditto on the discus launch-- no user settable launch speed found. Is there one in RFX?

Thanks

Enjoy a great week and weekend!
 

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technoid

Well-known member
I have a question. My new plane the T-28 Trojan seems to stick in the ground a lot of the time and it's hard to get it going, so if anyone knows why it's doing that I'd appreciate the help. All the tires have a collision mesh which is very round and is fully closed it but it still sticks. The collision mesh is pretty close to the tire but the tire doesn't stick through it anywhere. So if you have any idea what it is please let me know. I think all of my planes do that.
 

asj5547

Well-known member
Are you using the RC Ranch airport ? the runway surface there is rough and catches wheels, also your beta T-28 sticks on the Meadowlands RC Field runway.
Try Homestead airport or flight school for smooth surface, the T-28 rolls good there.
Do you have a screen shot available.
 
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technoid

Well-known member
Are you using the RC Ranch airport ? the runway surface there is rough and catches wheels, also your beta T-28 sticks on the Meadowlands RC Field runway.
Try Homestead airport or flight school for smooth surface, the T-28 rolls good there.
Do you have a screen shot available.
Yes that's the one but I've had several of my planes do the same thing on some of the older airports too. Sorry no screen shot though.
 

asj5547

Well-known member
Yes that's the one but I've had several of my planes do the same thing on some of the older airports too. Sorry no screen shot though.
Wow ! you're right, the T-28 sticks on many airports, (including Flight School and Homestead)I have only been flying it from RC Ranch which has a few cracks in the runway and various aircraft get stuck there, so I did not pay much attention to the concern.
The T-28 acts like the front wheel is glued to the ground, I deactivated the brakes (that did not help) I increased the strength multiplier on the gear and wheels (that did not Help) but the strength increase has worked on other similar import aircraft problems, sorry I can not be of more help.
 
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technoid

Well-known member
Wow ! you're right, the T-28 sticks on many airports, (including Flight School and Homestead)I have only been flying it from RC Ranch which has a few cracks in the runway and various aircraft get stuck there, so I did not pay much attention to the concern.
The T-28 acts like the front wheel is glued to the ground, I deactivated the brakes (that did not help) I increased the strength multiplier on the gear and wheels (that did not Help) but the strength increase has worked on other similar import aircraft problems, sorry I can not be of more help.
Yes that's kinda what it looks like, the front wheel is stuck. I walked up close to the plane and zoomed in all the way and throttled up the engine some and just watched until I finally broke loose and took off, but I couldn't tell anything. Then I looked really hard at the collision mesh for all of the wheels and they are definitely just slightly larger than the wheel itself and the wheel doesn't stick through the collision mesh at all. I'm going to adjust all three of the wheels collision mesh some and try that and see what happens. I'll post about it here once I try it.
 

technoid

Well-known member
I went back and made the spacing greater between the collision mesh and the main part and between any part around the collision mesh and it did the exact same thing in RF-X so I don't know what to do with it. So unless the KE guys will chime in on this I guess it will be released like that. It works in RF-X but sometimes you need to be quick on the throttle to break it loose. I wonder if the wheels are too small and they get stuck in the rough ground. Anyway I guess it is what it is. Bummer.
 

technoid

Well-known member
Did you try making them exactly the same? Or the mesh slightly smaller?
When I create the collision mesh for the left wheel I mirror it for the right wheel so they were exactly the same. And the last thing I did was check and make sure they were a little larger than the wheel. The LF/RT mesh was definitely larger than the tire and I made the nose gear mesh larger to match them since it looks like the nose gear gets stuck. One time I kept increasing the throttle when it was stuck and finally the nose gear broke off.
 
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technoid

Well-known member
Things too double check:
Naming
Hierarchy
Pivots
Rolling resistance
I've checked all that and it works perfectly in RF-8 but sometimes stick in RF-X, not all the time but often enough. The plane works okay in RF-X except you have to sometimes blurp the throttle to unstick it.

But what do you mean by Rolling Resistance, is that a setting in the physics. I'll go look right now for it. Thanks!

UPDATE: I just checked all three tires in the Physics and the Rolling Resistance Multiplier is set to 100 (default value)
 
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asj5547

Well-known member
If I set rolling resistance down to 20% it is difficult to make aircraft stick, 30% sticks often.
Only way to make T-28 not stick when applying gentle throttle is to set rolling resistance multiplier 1% and friction multiplier 50% (minimum settings) for the FRONT WHEEL only, leave main wheels at 100%
 
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technoid

Well-known member
If I set rolling resistance down to 20% it is difficult to make aircraft stick, 30% sticks often.
Only way to make T-28 not stick when applying gentle throttle is to set rolling resistance multiplier 1% and friction multiplier 50% (minimum settings) for the FRONT WHEEL only, leave main wheels at 100%
Thanks for checking that out I've been working on the T-28 engine again, now it's a 9 Cylinder Radial. I'll upload a beta shortly in the build thread.
 

asj5547

Well-known member
Thanks for checking that out I've been working on the T-28 engine again, now it's a 9 Cylinder Radial. I'll upload a beta shortly in the build thread.
Have you tried those 2 minimum settings on the front wheel ? The T-28 works flawlessly for me with that setup in RF-X, no glued to the ground effect!
So I tried the T-28 in RF 7.5 with the same minimum and maximum settings on the front wheel, I did not notice any real difference the way the aircraft acted on high/low speed taxiing or braking, front wheel had about the same amount of grip!
Maybe you could test it in RF 8 to see if you have the same result.
9 CYLINDERS, okay now I'm interested!!!! looking forward to more power and the 9 cylinder sound effect. Are you making the tail hook active?
 
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technoid

Well-known member
Have you tried those 2 minimum settings on the front wheel ? The T-28 works flawlessly for me with that setup in RF-X, no glued to the ground effect!
So I tried the T-28 in RF 7.5 with the same minimum and maximum settings on the front wheel, I did not notice any real difference the way the aircraft acted on high/low speed taxiing or braking, front wheel had about the same amount of grip!
Maybe you could test it in RF 8 to see if you have the same result.
9 CYLINDERS, okay now I'm interested!!!! looking forward to more power and the 9 cylinder sound effect. Are you making the tail hook active?
It's the same power and sound just more cylinders. I uploaded a beta in the build thread so you can grab it there. Thanks for checking those settings out I'll do the same in RF-8 I was worried making them so low would really mess it up in RF 7.5 and RF-8, but if it's nearly the same that can be a work around. So what settings did you use again and I'll try them in RF-8. Thanks!

UPDATE: The tailhook is active but you have to do two things to use it since I ran out of separate channels.

TAILHOOK CONTROLS

1. Lower the Flaps all the way down using the Channel 6 Knob.
2. Use the Low Rate Switch to Lower and Raise the Tailhook.

Note: Once the tailhook is down raising the flaps will raise the tailhook too, the flaps being down is an ENABLE for the Tailhook so if you raise the flaps the Tailhook will be Disabled and Raise Up.

Beta Upload Post Link

http://www.knifeedge.com/forums/showpost.php?p=284627&postcount=432
 
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technoid

Well-known member
If I set rolling resistance down to 20% it is difficult to make aircraft stick, 30% sticks often.
Only way to make T-28 not stick when applying gentle throttle is to set rolling resistance multiplier 1% and friction multiplier 50% (minimum settings) for the FRONT WHEEL only, leave main wheels at 100%
I just tried this in RF-X

Rolling Resistance 10%
Friction Multiplier 50%

On the Medowlands RC Field when the plane is loaded it starts rolling forward and keeps going off the runway and all the way across the field until it hits something and makes the break apart sound, the plane is hidden in the foliage by that time. What does it do for you there?
 

asj5547

Well-known member
I just tried this in RF-X

Rolling Resistance 10%
Friction Multiplier 50%

On the Medowlands RC Field when the plane is loaded it starts rolling forward and keeps going off the runway and all the way across the field until it hits something and makes the break apart sound, the plane is hidden in the foliage by that time. What does it do for you there?
When plane loads in Meadowlands it just sits there until I apply the absolute minimum amount of throttle to start it rolling (no sticking)
and because it is a down hill slope, it just keeps rolling until I apply down elevator for brakes and I can stop the T-28 on the runway. Yes it will roll all the way if I let it.
Talking of brakes, can you give the brakes a little more stopping power, I have tried altering the brakes graph points in the editor, but the editor does not save them.!
My rolling resistance is set to only 1% and 50% friction.
 

technoid

Well-known member
When plane loads in Meadowlands it just sits there until I apply the absolute minimum amount of throttle to start it rolling (no sticking)
and because it is a down hill slope, it just keeps rolling until I apply down elevator for brakes and I can stop the T-28 on the runway. Yes it will roll all the way if I let it.
Talking of brakes, can you give the brakes a little more stopping power, I have tried altering the brakes graph points in the editor, but the editor does not save them.!
My rolling resistance is set to only 1% and 50% friction.
Thanks. When my plane loads it starts rolling right away, no throttle needed. And yeah it needs a tad more braking power I've been meaning to add some but I keep forgetting .. thanks for reminding me.
 

asj5547

Well-known member
Thanks. When my plane loads it starts rolling right away, no throttle needed. And yeah it needs a tad more braking power I've been meaning to add some but I keep forgetting .. thanks for reminding me.
I have the T-28C in my hanger now, thanks for the download, that 9 cylinder radial looks great and the plane fly's perfect. (already removed the glue from the front wheel)
Lets hope Jeremy's high poly count fix will solve this problem for you.
Now back to flying, and looking for something I can get that tailhook latched onto!!! there must be a phone line around somewhere.:):):)
 

technoid

Well-known member
I have the T-28C in my hanger now, thanks for the download, that 9 cylinder radial looks great and the plane fly's perfect. (already removed the glue from the front wheel)
Lets hope Jeremy's high poly count fix will solve this problem for you.
Now back to flying, and looking for something I can get that tailhook latched onto!!! there must be a phone line around somewhere.:):):)
Cool I'm glad you like it. Now where is that telephone line :)

I have the tire collision mesh up to 196 triangles now. The mesh is curved a little across the top just like the tire and has four sections just like tread would be. But I'm beyond the 1,500 triangle limit so I have to remove some more triangles somewhere before I can test it. Right now I'm watching a movie with the wife so no work until later. Just put on a pizza so I better check it.
 
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