What is your normal throttle and picth curve?

[vette747]

Ok newB question. I had the throttle curve position 1 at 0%, 2 @ 25, 3 @ 50, 4@75 for the sceadu and the lepton. Then I started to play with it.

Now I have the lepton back to the standard setup. It was windy today, 32 km/ph wind and the lepton is more stable with higher engine speed.

Anyway, I have the sceadu setup for normal throttle at 1: 0%; 2:20%; 3:30%; 4:40%; 5:100. The normal pitch curve is 1:0%; 2:45%; 3:75%; 4:90% and 5:100%.

I had too much engine RPM. Not sure if this is because I went for carbon fiber blades shorter than the 600. I have 550. That could put less torque on the engine. I also bought at carbon fiber 600, but I have not tried it yet.

I have not played with the pitch curve on the sceadu yet.

Side note: I'm not doing 3D. I can fly and do 8 figure; that's all.


In summary what do you guys have???

Thanks in advance.

Edit: I forgot to say. I have a 50 Hyper

Carol
http://pages.videotron.com/vette747/

[Tommy Norman]

i would really think about installing those 600's on there. i'm a newb too and i fly the 600mm radix mains. i have no problem with the head speed. the 550's are not enough for the hyper 50. i can post you my set up for the pitch curve tommorrow if you like

[Jafa]

I will assume you want to hover at 75% collective (3D mode)

Sceadu normal Mode
Throttle: 0 25 35 45 100
Pitch: 0 25 50 75 100

Lepton Normal Mode:
Throttle: 0 55 55 55 55 <- This is for the Jazz ESC in govenor mode
Pitch: 0 25 50 75 100

[vette747]

Thanks to all for your input. I reprogrammed the transmitter with Jafa's setting. I have not had a chance to fly the sceadu today, but I will try it tomorrow or this weekend. I will also put the 600 Radix blades.

[Ivan]

you set your pitch curve to fly how you want it to, then match the engine to that. With 550s, you will probably never use full power unless you do some hefty cyclic to throttle mixing.

Anything more than about 11º of pitch is ineffective, or has a diminishing return. There is really no need to try for more than that.

My suggestion is to set a three point curve. -10,0,10 or something like that. Get your mechanical setup so your points match your pitch. IE, on a -10,0,10 pitch curve, your transmitter will be 0,50,100. if you want to use a funky pitch curve (-4,5,10 or something liek that) it is a matter of changing the transmitter curve. since you know the ratio of transmitter numbers to actual numbers, it is easy, and you almost don't need a pitch gage.

Also, you will know that at 75% pitch, the heli needs X% of throttle. They should always pretty well match up. Having what I call a "pure" mechanical setup will make the ratios simple, and save you from figuring third degree algorithms (or lots of trial and error).

I have never used anything more than 5 pitch points (my 10x can have up to nine per curve). Most of the time I only use three. I will use 5 throttle points, as they relate well to the common stick positions. (Idle, inverted hover, 0 pitch, hover, and full power)

By far the hardest part is getting all the linkages set. Everything at 90º at 0 pitch and even on either side of zero. That being said, it is also the most important.

Good luck to you.

[vette747]

Thanks a lot Ivan for your answer as usual you help a lot. It took me so long to answer because as a new b, I had to understand you precise answer was telling me. I removed the 550 for a couple of weeks. I did not know how to use cyclic to throttle mixing. One of a guy I know do real 3D and told me he does not set it up.

I can understand anything more than 11 D pitch is ineffective. I have max and neg max at 10 Degree. And the pitch curve on the transmitter is 0, 25, 75, 100. I do not thing I want to use a funky pitch curve at my learning curve now.

What you say next, if I understand it is that at 75% pitch, the heli needs x% of throttle. They should match up. I think I got what I need as you said. I have pitch at 0, 25, 50 , 75, 100 and throttle at 0, 25, 35, 45, 100. Not too sure now, because, I should have 75 throttle at 75% pitch.

In summary, I have standard pitch curve at t 0, 25, 50 , 75, 100 and 0, 25, 35, 45, 100 as throttle curve. It works quite fine for me.

Today I put back the 550 for a test. I find that the motor rev as increase. It looks like it is more agile for left and right maneuver. Like if the engine has more power to react to my “weird” commands.

You are a thousand miles head of me and I’m always glad and happy you answer my questions. If you say that the key point is to have all the linkages set and everything at 90 at 0 pitch and even on either side of zero….. I’m there. At least my helis are well tuned.