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Other › More Rave "wisdom" from Aox
03-21-2009 12:36 AM  8 years agoPost 21
cstoneman

rrApprentice

Colorado

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Hey Don,

Glad you have the numbers worked out. At that headspeed, I am not even going to mess with gyro setup. Probably a waste of time. the tail mix will probably have to wait also.

I will get the servo linkages set, and leave it at that until I get the 4S packs in.

I tried the LHS, and they don't have any 4S under 5000 MAH. But I want the Outrage anyway. I just have to be patient. If I get her done this weekend, I can pay a little extra and get some 4S packs 2nd day in by wednesday.

I will keep everyone updated on the progress.

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03-21-2009 01:27 AM  8 years agoPost 22
Carbon Copter

rrVeteran

USA

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Don, how did you come up with the 2300 HS with a 14T and the -10? I used a HS calculator I found on Ready heli and was under the impression I was getting around 2400 - 2500 running the -10 3s packs and a 13T pinion. I would be interested if I calculated wrong I would have guess about 2600 - 2700 HS with the 14T. Where did you get 14T from? I could not find any I wanted to buy one.

You will not have a problem on the 3s -10 as I fley 20 packs through mine now with out issue. Hovers like a 50 size.

~oo~ Stop fogging up my glasses

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03-21-2009 02:01 AM  8 years agoPost 23
Sky Dancer

rrVeteran

Bryan, Texas

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Carbon Copter,

Yes I agree, there are a lot of variables to consider in head speed calculators and these are the parameters I used with my head speed calculator:

Battery: 3S
Motor KV: 3000 (-10)
Main Gear: 177T
Pinion: 14T (gear Ratio 12.64)
Efficiency: 90%
Cell Voltage: 3.71
Head Speed: 2371

You can select a higher cell voltage and get a higher head speed on the calculator but this is what I usually use to select the gearing for my helis.

BTW, I got my 14T pinions from PowerHelis. http://www.powerhelis.com/prodinfo....ND%2DYR%2DAS093

Don C

Keep up your rotor speed !

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03-21-2009 02:25 AM  8 years agoPost 24
cstoneman

rrApprentice

Colorado

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Man I am an electrical nerd type of guy, but I am lost.

Just pray that it hovers, so I can at least have glory in the first flight.

After I brush up on this electric stuff, I will be back, and sure to piss everyone off.

I would be building right now, but Friday night is reserved for JD.

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03-21-2009 03:02 AM  8 years agoPost 25
Carbon Copter

rrVeteran

USA

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Don Thanks. I don't know much about HS calculation either

Here is the calculator I used. With 14T pinion (thanks for the link), according to this one I would get near 2600

Take a look when you can at this one and see what you think being that you know about this! If I did get around 2100 - 2200, it flew pretty good. I have 13T pinion, -10 and 3s 2500 currently

http://www.readyheli.com/Online_Hea...ulator_s/81.htm

~oo~ Stop fogging up my glasses

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03-21-2009 03:24 AM  8 years agoPost 26
cstoneman

rrApprentice

Colorado

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At this point I say...YARP

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03-21-2009 04:40 AM  8 years agoPost 27
Sky Dancer

rrVeteran

Bryan, Texas

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Carbon Copter,

I just looked at the headspeed calculator link and I agree it has a bit more than I need and is just a little confusing....

And if you do the calculation with a slightly highter or lower battery voltage level you'll see a different head speed anyway. After all, I only use these to get in the ball park and select a pinion. Then I use a tach to finalize it.

If you guys would like to have a copy of the basic head speed calculator I got off the net a while back, just PM me with your email address and I'll be glad to share a copy with you. It's quite simple and easy to use. See what you think!

Don C

Keep up your rotor speed !

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03-21-2009 05:02 AM  8 years agoPost 28
USNAviationjay

rrElite Veteran

Houston Tx USA

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Well looks like my last little crash also broke the frame right next to the motor mount.. didn't even notice till tonight when gear mesh didn't sound right and I noticed it skipping by hand.. sigh.. this blows.

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03-21-2009 05:10 AM  8 years agoPost 29
Carbon Copter

rrVeteran

USA

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Damm Jay, that sounds like it was a complete re-kit

~oo~ Stop fogging up my glasses

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03-21-2009 05:29 AM  8 years agoPost 30
Sky Dancer

rrVeteran

Bryan, Texas

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USNAviationjay,

Man that sucks.... Sorry to hear you're not back in the air yet.

I'm thinking of getting another kit (bare bones) and a couple of blade sets. That way no matter what I should happen to break I'll have a spare.

Get that bird back in the air, man!

Don C

Keep up your rotor speed !

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03-21-2009 12:39 PM  8 years agoPost 31
Carbon Copter

rrVeteran

USA

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Thanks Don --Sent you a PM for the less confusing calculator. lol

~oo~ Stop fogging up my glasses

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03-21-2009 03:59 PM  8 years agoPost 32
Sky Dancer

rrVeteran

Bryan, Texas

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Calculator sent.

Keep up your rotor speed !

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03-21-2009 04:40 PM  8 years agoPost 33
Aox

rrApprentice

Irvine, CA

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Soo... The rebuild is about to begin. I ate the gears on my 9257 when I went in, so I figured I'd give the ole 3500G a try with my 401. Am I going to like this new tail servo? The 9257/401 was holding like a dream after I turned the Rave's pitch range down a bit. I think that's where the newer gyros really excel, is handling more torque quicker than the 401.

The 3500 as good as the 9257?

-Aox

Synergy N9~/~Trex250-450-600N~/~Logo 500 3D~/~Rave 3D~/~Mini-Titan A109K2
AMA #902257 - OCMA

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03-21-2009 07:44 PM  8 years agoPost 34
Carbon Copter

rrVeteran

USA

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The 3500 as good as the 9257
Better.

~oo~ Stop fogging up my glasses

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03-21-2009 09:41 PM  8 years agoPost 35
JSX

rrApprentice

France

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Hi all.
I had a crash last week, but not for same reason. 150 $ too
Gyro problem on an inverted hovering.... not the first time this Logictech gyro has such issues. So I just buy Mini-G which is incredible with my Align DS520.. Perfect lock, crazy piro rate at 150 % ATV rudd And with some expo it's always very precise in all manoeuvers, I love it!! I decided to buy it cause 150 $ crash because of a gyro....... another crash like that and it was aquivalent to a Mini-G + G View!! So I buyed the MG to avoid these issues.
About TT, it's the best tail system for me. Belt can broke in fly too.... TT normally no, axecpt if a gear has benn damged in a precedent crash. And TT is really more efficient. Autos with 350's are excellent, like no other 450 can do them I've seen some videos with G5 on autos and they are bad.
About gears, I agree with Sky Dancer, It's better to change them all after a big crash, or big tail "boom". And rear tail shaft can be slightly bend, but it's often impossible to see... So better to change everything.

~¤°Rave~4S/350¤Trex250°¤~

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03-21-2009 10:56 PM  8 years agoPost 36
dpeagle

rrNovice

colorado

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Aox ; i run the spartan with the 3500 and its amazing. i think i could snap the boom with direction changes. i would suggest however that you make sure you dont run it at 6v. i know this will probably stir up a hornets nest. i know many here have had great success at 6v. my personal experience however had the servo fail even before its maiden. it ran very hot at 6v and would only move in one direction after only a short period.

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03-22-2009 01:48 AM  8 years agoPost 37
Carbon Copter

rrVeteran

USA

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If I can get a hover I will be happy. It will amount to a lot of 10 second hovers while adjusting links to get the swash and tail servos mechanicaly set. Then work on the gyro.
I hovered my Rave this afternoon in my drive way. In what I would consider windy conditions. My t-rex would have been all over the place which means it would have hit the house. My Rave was stable as anything. TOTALLY awesome. Palm trees blowing all over and a pretty solid hover. So cool.

Anyway, I timed 2 11 min hovers with some forward and reverse flight hovers with 3s 2500 packs, so even if you got 1/2 that with your 1800 packs, you will have plenty of time adjusting your heli.

~oo~ Stop fogging up my glasses

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