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Low Head Speed Helicopters Low Head Speed Helicopter Setups and Flying info


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Old 10-10-2016, 11:57 AM   #1
Koopyetz
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Default 450 with 2s lipo

Upon the suggestion of others I have just started using 2s lipo for my 450. Using TC @ 98 as a start did a brief hover . Tail authority is good. I have upsized tail blades when necessary. Will be experimenting with different TC and slowly increasing flying time to see how she reacts. Thanks to Nikki5 and others for their help.
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Old 10-10-2016, 03:23 PM   #2
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Look forward to how this turn out.... what size blades are you running?
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Old 10-10-2016, 04:32 PM   #3
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The blades are 325's that came with kit. Will see what she can do .
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Old 10-14-2016, 04:41 PM   #4
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First day of multiple hovers using 2s lipo with 450 .
Did 3 - 1 minute hovers today . Full pack read 8.36 at beginning and ended with lipo reading of 7.92. Head speed reading using helitach at beginning was 2117 and 2058 at end. No tail wagging or bobbing. Will start to do continuous flight to see how many seconds I can get past 3 minute mark for TC as it is now and then lower TC and start again.
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Old 10-19-2016, 03:19 PM   #5
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Currently at TC 0, 65,65,65,65. Flew two 1min 30 sec flights hover and ff. Full pack reading 8.36v ended at 8.00v. Motor slightly warm. HS unknown. Could not get reading from helitach. No tail wagging or bobbing.
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Old 10-25-2016, 02:35 PM   #6
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Subscribed. I may have to pick up some 2S packs to try out just for grins. I've been playing with a Blade 180CFX on 2S and it works great. Dropping from 3S to 2S really helps tame that wicked little beast!

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Old 10-25-2016, 02:57 PM   #7
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Interesting. So this is to tame it down instead of just running a lower TC on 3s plus dual rates??

Imagine 2s will tame it way down like a gearing change+lower TC+dual rates???

Interested to see what kind of performance and flight time you get. Tried 3s in my 6s 450 to see if I could get some long low hs flights but it could barely lift off the ground. ..lol

Thought about trying 4s but just ran a low TC since my esc has active freewheeling and learned that I don't like low hs anyway but always find new experiments interesting.

Once in a while you find something everyone says will never work that ends up working great
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Old 10-25-2016, 07:11 PM   #8
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The 180CFX has been a relatively easy 2S conversion for me. On the 450 it may or may not be as easy. I don't know yet. Only dropping the TC using 3S means something has to absorb the heat from running at part throttle all the time and that will be the ESC. Also you'll never find a pinion small enough to be able to run the 3S motor efficiently at 2S RPM using a 3S pack. I've cooked a few ESC's trying this. I always learn the hard way.

I've got a pile of Align and clone 450's that I was going to get rid of. They could now become 2S test mules as I don't care if they crash and I have a mess of parts for them. If it all works out I may convert some of my beloved Beam 450's to 2S. Due to my thumb physical limitations high performance and 3D are the LAST thing I'm concerned about. 2S sounds real good to me.

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Old 10-26-2016, 12:00 PM   #9
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Quote:
Originally Posted by Turbojoe View Post
Only dropping the TC using 3S means something has to absorb the heat from running at part throttle all the time and that will be the ESC. Also you'll never find a pinion small enough to be able to run the 3S motor efficiently at 2S RPM using a 3S pack. I've cooked a few ESC's trying this. I always learn the hard way.
In my experience, it totally depends on the ESC. I routinely run the Oxy+/Eox on 4s at an FBL-governed HS that is equivalent to 40% throttle. I took it down to 35% quite a few times during initial testing. The HW50A (v3 so no AFW) does not even get warm. Absolutely no issues. Flight times are also on par with what folks get with theoretically more efficient set-ups.

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Old 10-26-2016, 01:48 PM   #10
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Quote:
Originally Posted by Wargamer View Post
In my experience, it totally depends on the ESC. I routinely run the Oxy+/Eox on 4s at an FBL-governed HS that is equivalent to 40% throttle. I took it down to 35% quite a few times during initial testing. The HW50A (v3 so no AFW) does not even get warm. Absolutely no issues. Flight times are also on par with what folks get with theoretically more efficient set-ups.

Very interesting information you posted. Wonder if my statement on stopping at 60% TC might be re-evaluated . With my plans not to push helicopter might be able to lower TC . Did 4 minute flight today. Motor slightly warm and nothing significant on ESC.
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Old 10-29-2016, 04:13 AM   #11
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Funny subject I've gotten 7 minutes (before the low voltage took over yes over discharged) on a 6 s setup with low throttle curve and flying smooth 3D but can get 5 minutes easy
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Old 10-29-2016, 04:29 AM   #12
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Quote:
Originally Posted by Kap'n Krunch View Post
Funny subject I've gotten 7 minutes (before the low voltage took over yes over discharged) on a 6 s setup with low throttle curve and flying smooth 3D but can get 5 minutes easy
^^Similar to my experience.
Personally I'm sure what the objective of all this low cell count / very low headspeed stuff is? Is the idea just to hover for the maximum time possible?.. Sounds extremely boring if so.

If all you want to do is hover for ages connect a long wire to the heli and a big old RV battery on the ground... you could hover all day.
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Old 10-29-2016, 02:47 PM   #13
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Quote:
Originally Posted by Turbojoe View Post
If it all works out I may convert some of my beloved Beam 450's to 2S. Due to my thumb physical limitations high performance and 3D are the LAST thing I'm concerned about. 2S sounds real good to me.

Joe
I have two Beam 450s, one flybarred and one FBL and they both need to run pretty much flat-out for any aerobatic flying. (both are 3s and I think the headspeed is around 3000 and it just seems to require that kind of hs for them to work properly for me)

When I was flying a Trex 450 I used to get about 8 minutes of gentle circuits just by running a lower throttle curve on 3s.
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