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Advantage Hobby . Revolution Models . CarbonXtreme

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Aerial Photography and Video > I have received my gear from Airfoil!!!!
 
 
groundeffect
Key Veteran
Location: Newfoundland Canada

Doing the radio setup.

I have installed the 3 9252's on the swash and a 9252 with 401 on my tail.

I am in the process of trying to setup the throttle and pitch curves now.

Does the Jeti-70-3p speed controller have an internal governor, or so I setup normal throttle/pitch curves as if this Voyager 50 E was a gas/glow machine?

I am running JR's 8103 Tx -- with 5 points pitch / throttle.

any tips guys? -- the jeti manual does not tell me much with regards to helicopter setup.

cheers,
Dean
04-11-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

You set up the mechanics per the V50 book and all of the mixing is done with the 8103. The speed controller is then controlled by the 8103 after it engages the motor. You'll be hitting 100% on the motor by half stick (or even sooner) and will maintain it throughout the positive pitch curve...
04-12-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

Right now my throttle travel is setup at +100 and -100. My throttle curve right now is linear ( 5 points ). 0%, 25%, 50%(mid stick), 75% 100%

Why would the speed controller give 100% throttle at less then full stick?

thanks,
Dean
04-12-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

At 1/4 stick (25%) you should be at 50% throttle on the throttle curve on your 8103. As you continue up to 1/2 stick (takeoff/hover) your throttle curve needs to be at 100%, max power. It will be at 100% all the way up thru max pitch...
04-13-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

throttle and pitch setup complete!

eyeisdee1:thanks!!

My pitch and throttle are setup on my JR 8103!!!

Throttle:

H: 100%
3: 100%
2: 100%
1: 50%
L: 0%



Pitch Range: -6 to +13

pitch setup:
H: +9
Mid: +5
L: -4


auto:
H:+13
Mid: +5
L: -6
04-22-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

Setting up Carbon push rod

I messed up the install of the CF tail push rod that comes with the Airfoil Kit.

I have a MR. Carbon push rod kit I am installing.... waiting for the JB weld to dry as I type.

When the JB weld dries I need to check over the whole machine again, and set the initial gain on the 401.


cheers,
Dean
04-22-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

Hi Dean,

Glad to help. On the 401 I don't think you will need to mess with it at all. If your rudder mechanics are set correctly, just make sure the switches are in the right place on the 401. I have not had to change anything right out of the box and it's been doing great, and set it on the back of the radio tray..

Also your negative pitch @ -6 is slightly high. I would set at -4, to -5 max. That's what John O had me set mine to. And remember, when you set her down after every flight be very careful not to chop the throttle or you'll chop the tail boom, lol.
04-22-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

I have -6 on the low end for autos in hold mode only. Do you recommend changing this for even autos -- to -5 instead of -6?

I have -4 for normal flying modes.


cheers,
Dean
04-22-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

I am ready for a test flight!!!!!

i just need to check over the machine again to makesure things are in order, tightened, aligned etc...

Right now the winds are a little high and its raining a little at times here...


Any tips / suggestings before the test flight?


cheers,
Dean
04-23-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

Pray! Just kidding Did you run it up full speed without blades first? It everything is smooth for a minute or two, I would then add tail rotor blades and run up again and see if all is well there and swing the tail alittle and become happy with that. Then throw on the main blades. Remember to pre-spool them by hand cause the motor will kick hard..

Hope this helps..


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04-23-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

First Flight Complete!!!!

The rain let up here this afternoon.
I just got back from my first flight!!

This is what I noticed:

#1
HOLY **** the torque on this motor!!

#2
Startup:
======
I did as mentioned by many:
1. spool blades by hand
2. hold tail horizontal fin for a moment and spool up a little ( SLOWLY ) -- may 1-3 notchs worked for me.
3. stepped back and then lift off taking care and watching the tail moment.

There was a little wobble in the skids, and what I thought to be a lack of power. I then realized after I got home that my throttle travel adjusment ( ATV ) were set at 100 NOT 100% BIG DIFFERENCE...

So, I am off to try again with throttle adjustments from -150 to 150 on my JR 8103 (which is 100% throttle on that channel ) INSTEAD of the initial value of 100 and not a value of 150.


150 value == 100% in my JR 8103.

So, I am hoping the wobble was just a cause of too much pitch for the amount of power I was allowing it to have by mistakingly limiting the throttle to value of 100 and not 150=100%

So, in actual fact I far at 75% full throttle and not 100%


#3 Wow, very quiet!! and NO SMOKE


I am off to try again with 100% full throttle == 150 travel adjust ( ATV ) on throttle.


Hope to have better luck this time....
cheers,
Dean
04-23-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

another flight....!!

Well, I have more available power now!

I increased the ATV to 150 ( which is 100% ) as apposed to value of 100 ( 75% )...

I also noticed that I get more throttle when turnning up my throttle trim. -- However, this is dangerous because if your in hold mode, the throttle is at 0 % ( setup maually in the radio hold mode ) -- but when you are at low stick, the flip off the hold, if you trim is up on throttle you will get a kick and the motor will torque a little --- it may even bite a bit -- not good for the motor or anyone standing close!!!


Wobble!
I am still getting a wobble, I think ( and hope ) its because of the links --- They are very tight, very very tight. I need to size them tonight/tomorrow morning and try again to see if the wobble goes away.


I noticed the wobble usually when using heavy cyclic controls or quick collective inputs. I think the links are so tight they are binding, drawing power and making this very choppy right now.

Hope to test more tomorrow morning.

cheers,
Dean
04-23-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

Hi Dean,

I would refrain from resizing your links. The wobble might be caused by a few different things. First of all, the main blades should be pretty tight in your grips. They should require at least moderate force to move them. Some people spool up the rotor head to speed, then hanker them down tight to where they won't move at all. I don't do this cause I just keep mine pretty tight and it works for me. If they are to loose you may be facing a lead lag issue.
Next, when you installed the metal grips did you spray the spindle liberally with silicone (3M p/n 051135-08877)? If the spindle and bushings are dry, I have heard this can cause wobble.
Finally, you might have a tracking problem. It doesn't take much to cause a wobble/vibration. The links aren't going to be you problem, I would bet. If I had to choose one of these issues, I would recommend you check your tracking. Believe me, when you get it tracked, you will know beyond a doubt. It will hover so smooth that you will hand over your radio to your drunk brother-in-law that just lost a game of pac-man, lol.


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IMHO..
04-23-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

Hey...

I will check the tracking again tomorrow.

As for the links, they are very very tight.

As for the spindle, I did in fact lube it up with silicon grease.


thanks for the suggestions, I will hopefully know more after tomorrow morning.

cheers,
Dean
04-24-2004 Over year old.
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eyeisdee1
Senior Heliman
Location: AK

That's cool, but again I wouldn't worry about the links. As long as all of the JR logos are facing outwards on the links they will be ok. For a working camera ship, not doing 3D, tight links will wear in. Unless of course your servos are laboring moving the swash plate on all axis', and causing you very slow input responses, I really wouldn't worry about it. You resize one of those links too much, and if it pops off in flight, yer gonna be a hatin it..

Cheers


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04-24-2004 Over year old.
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daggit
Elite Veteran
Location: Waseca MN

You didn't say what kind of main blades you're running. The wobbles can be caused by unbalanced blades too
04-24-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

wobble on some times durring flight.

Hey guys, thanks for the comments.

I am running the blades that came with the Airfoil kit,. 680mm blades. Razor's maybe?


They are balanced.


! The wobble is not thoughout the whole flight, just parts, parts of the flight where I do alot of cycic input it seems.....


cheers,
Dean
04-24-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

spindle...

I just pulled the spindle out.... I put a load of grease on it durring the initial build, yes the non-petro based lube.... but its pretty dry now....

I am going to install more now, more on the inside of each damper and try again tomorrow.


cheers,

Dean
04-24-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

Another few flights...

Did some more test flying today. Tracked the blades a little better this morning.

The additional lube on the spindle seemed to help rid the wobble a little, however, it was still there!


I then sized some links at the field and I noted that the wobble seemed to not as evident.


ANOTHER WOBBLE -- I also noticed that when the pack would die out I would get a wobble -- only this wobble I think is because of the lower head speed and not enough power to keep the ship in the air, as it was hard pressed to lift into a hover when the pack was almost drained.


CURRENT FLIGHT TIME:

I am currently getting only just over 7min with no additional gear right now. These packs have only been cycled 2 times each, I am hoping they will increase capacity and give longer flight times.


LINKS:
Some of the links are still a little tight.



more testing to follow.....

cheers,
Dean
04-24-2004 Over year old.
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groundeffect
Key Veteran
Location: Newfoundland Canada

I have a wobble every now and then. I think it was due to headspeed and too much pitch on the top end, in combo with tight links.

I have had 30 flights on my ship now and I am hard pressed to find the same wobble.


cheers,
Dean
05-04-2004 Over year old.
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