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› What are your Wind limits?
03-22-2009 05:50 AM  8 years agoPost 21
racin06

rrKey Veteran

Indianapolis,​Indiana

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Racin, what's the headspeed of your HBK2 you think?
I've never checked the official headspeed with a tach; however, based upon those online headspeed calculators I've used, the headspeed is estimated at 2891 assuming an efficency factor of 85% for the Esky 3900 motor.

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03-23-2009 01:32 AM  8 years agoPost 22
trackemdown

rrVeteran

Central ,VA

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everytime I try to fly mine in the wind, I usually loose control, although I haven't completely hit the ground. It's just a matter of time...

Grabbem-n-baggem

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03-23-2009 01:44 AM  8 years agoPost 23
tryan02

rrProfessor

Canton, Missouri

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Online headspeed calculators calculate max headspeed!!!!

Where do you fly your heli at? I think from what I have found and others have measured you can figure about 75% of calculated.

No Really I am the club President!!!

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03-24-2009 06:16 PM  8 years agoPost 24
Melnic

rrElite Veteran

Columbia, MD,USA

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You may very well be at about 2900 but maybe not. At least I know your probably not at 2200

I've spent a bunch of time lately on headspeed stuff. Online headspeed calculators (I like the Darkhorse Motor Calc) don't tell you what you are flying at, Mostly what you SHOULD fly at w/ the motor, gear ratios you are using to get optimum efficiency. It worked out well when I was messing w/ my EXI as well as deciding what pinion to get w/ my 3000kV motor for the HBK2.
Depending on the linearity of your ESC and how you set your pitch and throttle curve, headspeed can varry 400-500RPM (or more) than the calc.

I use an optical tach for an RC airplane stuck into the ground and tach it in idle up mode as it gets light on the skids. Sometimes I'll also strap it down to my Workmate300 bench and measure it there using a flashlight since the tach does not like 60hz lighting.

I'd like to revise my wind limits and say that like today 44F and 15MPH, I don't think I want to fly ANYTHING unless I'm surrounded by my flying buddies heckling me. I left my "Radio Mit" at home and my only issue was the cold fingers. Everyone was leaving as I was arriving around noon.

http://dhrc.rchomepage.com/calc.htm

I wonder if there is a sound spectrum analyzer that could calculate RPM from sound of a video or audio file? Anyone know?

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03-24-2009 06:41 PM  8 years agoPost 25
norsman

rrKey Veteran

paradise PA

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Sometimes I just look at the wind and say--------------Lets Party dude

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03-24-2009 08:14 PM  8 years agoPost 26
tryan02

rrProfessor

Canton, Missouri

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I wonder if there is a sound spectrum analyzer that could calculate RPM from sound of a video or audio file? Anyone know?
yep all of them could, but accuracy is questionable speed of light is faster than speed of sound and video is an analog low frequency modulated signal which would add more confusion and both would require a much tighter resolution bandwidth which only comes in very high end analyzer's m aybe down to 1khz resolution and sweep time would have to also be very slow. A digital O-Scope with a PPM signal through a sensor be it optical or whatever capture method on edge triggering would be more precise. Which is basically what a tach does.

Where did that come from?

been 29-40mph winds and thunderstorms the last two days so I reiterate those are my limits.

No Really I am the club President!!!

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03-24-2009 08:32 PM  8 years agoPost 27
TJinGuy

rrProfessor

Socorro, NM - USA

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I hovered for about 1min last night in probably 15mph winds. But the speed of the wind was not the problem. It was out in front of my house and was swirling like crazy!!! I mean one second it was coming from behind me and the next from my right. The heli was ALL OVER and not to toot my own horn but I can hover, and with great control I might add, in pretty much anything but it was all I could do to keep the heli in a 15'x15' area! I finally sat it down with more finesse that I thought I could and grabbed about -5* of pitch to make it stay there while it spooled down.

So I need to update my "wind flying limits". As it turns out even 5mph is no fun when it is swirly and changing directions, and 15mph in that is damn near dangerous!

- Chris

Team New Mexico
TJinTech

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03-25-2009 09:05 PM  8 years agoPost 28
Melnic

rrElite Veteran

Columbia, MD,USA

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Filmed a short video showing my Foamie Electric with a Gryo mounted on the bottom. Gyro is tied to the Aileron servo.
The ailerons have a REALLY sloppy setup mechanically and they sell this RTF setup w/ crappy servos. I just fly it and glue/tape it when it starts to fall apart.
Video
YouTube Video of Foamie w/ Gyro
When I landed and looked at the wing guage, it was 16mph, it's like the wind senses I'm going to fly and starts to pick up all on it's own.

Here is the plane:
Sapac 330L RTF
Look at the plane but don't buy it, piece of junk really.
But w/ that Gyro on it, It flies in the wind ALMOST unnoticably. Only thing it does that you might notice is like a helicopter bounce up and down as the windspeed changes.

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03-25-2009 09:56 PM  8 years agoPost 29
TJinGuy

rrProfessor

Socorro, NM - USA

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I am getting a bad urge!
http://cgi.ebay.com/ws/eBayISAPI.dl...em=380107270466

- Chris

Team New Mexico
TJinTech

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03-25-2009 10:03 PM  8 years agoPost 30
tryan02

rrProfessor

Canton, Missouri

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well then TJ this one might seal the deal for you? I have been telling myself I dont need one I could buy a gallon of nitro and have some cash left over. But at this price it is dang hard to say no.

http://www.cabelas.com/cabelas/en/t...rset=ISO-8859-1

No Really I am the club President!!!

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03-25-2009 10:17 PM  8 years agoPost 31
norsman

rrKey Veteran

paradise PA

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That's really nice but really,if it to windy it's to windy who gives a $hit how windy.I would spend that money on a nice tach or fuel

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03-25-2009 10:18 PM  8 years agoPost 32
TJinGuy

rrProfessor

Socorro, NM - USA

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I saw that one but I have this thing for quality tools and it just seemed a little low on quality. And in the end it would only save me about $50 but if the higher quality one works as well as the reviews say, then the $50 would be well spent.

Oh and another reason I would like one is that I have always wanted one, helis or not. Besides I hate wind and this would give me a way to accurately hate the wind as well as a ammo for bitching about the wind.

- Chris

Team New Mexico
TJinTech

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03-25-2009 10:19 PM  8 years agoPost 33
Melnic

rrElite Veteran

Columbia, MD,USA

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I would not buy one because obviously my field has one. That's up on the roof. Wind is higher when you get higher up off the surface ya know.

http://www.dealextreme.com/details.dx/sku.17461

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03-25-2009 10:31 PM  8 years agoPost 34
tryan02

rrProfessor

Canton, Missouri

My Posts: All  Forum  Topic

I too thought that one looked cheap but upon inspection of a few of them looks like they all use the same fan so I guess accuracy would all be about the same as long as the electronics dont crap out?

I also was looking at homebuilts the hard drive motor with spoons and a bicycle speedo. But you can buy a nice home weather station at walmart for $60.

Yeah your right norsy I'll just buy more nitro down to 1/2 gallon of each 15% for the plane and 30% for the heli.

And melnic you are right wind is supposed to be measured 30ft above all obstructions with a handheld you would be an obstruction.

No Really I am the club President!!!

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03-25-2009 10:53 PM  8 years agoPost 35
norsman

rrKey Veteran

paradise PA

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I think I'm going with 15% for the raptor,30% is over kill

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03-25-2009 11:50 PM  8 years agoPost 36
tryan02

rrProfessor

Canton, Missouri

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15% is for plankers real heli pilots know there is no other fuel than 30%.

No Really I am the club President!!!

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03-25-2009 11:57 PM  8 years agoPost 37
Melnic

rrElite Veteran

Columbia, MD,USA

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15% is for plankers real heli pilots know there is no other fuel than 30%.
BLOW SMOKE, STAY COOL!

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03-26-2009 12:05 AM  8 years agoPost 38
norsman

rrKey Veteran

paradise PA

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$hit,you dident even want to here about nitro a few monyhs ago,let alone 30%.Real pilots dont need 30% its called good collective management

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03-26-2009 12:23 AM  8 years agoPost 39
GyroFreak

rrProfessor

Orlando Florida​...28N 81W

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When the rock is gone, it's to windy.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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03-26-2009 02:01 AM  8 years agoPost 40
norsman

rrKey Veteran

paradise PA

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Really,that works

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