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HomeAircraftHelicopterLow Head Speed Helicopters › Trex 600 Conversion LHS Multirotor 1150 Rpm
01-11-2015 09:44 PM  3 years agoPost 1
rctrooper1

rrApprentice

Brownsville, Texas

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Maiden Flight of my Trex 600 LHS Multi-rotor conversion. Head speed governed at 1150 rpm.

Watch at YouTube

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01-11-2015 09:58 PM  3 years agoPost 2
turboomni

rrProfessor

East of the Equator

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Very cool indeed! What is your setup and where did you get the 4 blade head and tail assembly's??

Setup is everything, All my heli's can fly far better than I can pilot them

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01-11-2015 10:22 PM  3 years agoPost 3
rctrooper1

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Brownsville, Texas

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set up.
I am using a Scorpion HKIII 4035-500Kv motor, ICE280HV Esc, Main gear 112t/pinion 14t for an 8.0 gear ratio. 600mm main blades and 95mm tail blades. Head speed governed at 1150 Rpm. I am using one 6S 3300 mah lipo. The multi rotor head and tail rotor are from RC Aerodyne.

I will upload esc data logs as soon as I get a chance.

Jz.

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01-11-2015 10:41 PM  3 years agoPost 4
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

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Pretty sweet indeed, nice job. I'm still working on mine, the frame is built, just piecing together the mod to stretch it.

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770

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01-11-2015 11:21 PM  3 years agoPost 5
rctrooper1

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Brownsville, Texas

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Thank you, looking forward to seeing your LHS Heli airborne!

Jz.

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01-12-2015 03:27 AM  3 years agoPost 6
cmezip

rrNovice

Denver, Co

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Very cool! Thanks for sharing!

Steve

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01-12-2015 03:36 AM  3 years agoPost 7
Cobra 46

rrKey Veteran

Cambridge il usa

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Nice !!

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01-12-2015 03:43 AM  3 years agoPost 8
rctrooper1

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Brownsville, Texas

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Thank you!

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01-12-2015 05:28 AM  3 years agoPost 9
ICUR1-2

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Ottawa, Ontario

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very nice

is it possible to raise the gear ratio?
can you put an 11t pinion on it ?

just curious

spending time, paying attention

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01-12-2015 04:22 PM  3 years agoPost 10
rctrooper1

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Brownsville, Texas

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gear ratio
yes, I believe these pinions are available

The pinions that will work with your slant 112t main gear that I know of are
10T = 11.2 to 1
11T = 10.18
12T = 9.3
13T = 8.61
14T = 8 didn't know the 14t was available.
16T = 7

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01-12-2015 05:29 PM  3 years agoPost 11
turboomni

rrProfessor

East of the Equator

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Does your esc have free wheeling? If not do you know your throttle percentage is to get that headspeed? Or is the esc and motor running cool? Just wondering about efficiency.

Setup is everything, All my heli's can fly far better than I can pilot them

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01-12-2015 07:01 PM  3 years agoPost 12
rctrooper1

rrApprentice

Brownsville, Texas

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No, Castle ESC's are not free wheeling. You need to manually set up the voltage (lipo) thru the castle link. I have my throttle curve set at 91%. I am sure the esc is running very cool and the amps drawn are low too. I will download the data log tonight and post it here.

thanks

jz.

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01-12-2015 07:27 PM  3 years agoPost 13
turboomni

rrProfessor

East of the Equator

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Looking forward to it.

Setup is everything, All my heli's can fly far better than I can pilot them

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01-12-2015 11:36 PM  3 years agoPost 14
Cobra 46

rrKey Veteran

Cambridge il usa

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Yo guys are so techie I can't even figure out how to post somebody's quote
And you guys are posting stuff from your PC!!!!

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01-12-2015 11:44 PM  3 years agoPost 15
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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if it's worth doing, it's worth learning.

I never realized how much there was to learn when I started, 8 years later and still learning new things.

Question for the topic
has anyone tried a higher gear ratio?
and was it more efficient for LHS ?

spending time, paying attention

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01-12-2015 11:55 PM  3 years agoPost 16
turboomni

rrProfessor

East of the Equator

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Do you mean a higher rotor speed or lower rotor speed or the same head speed with a higher or lower motor rpm?
rctrooper's heli is very interesting because of the four blade head and tail. I would think with all that blade area he could maybe go to a lower head speed with good control!

Setup is everything, All my heli's can fly far better than I can pilot them

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01-13-2015 12:07 AM  3 years agoPost 17
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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this is what I'm pondering.
if you raise the gear ratio you end up lowering the amp draw but now the motor has to speed up to keep same HS.

or would it be better just to lower the gear ratio and slow down the motor speed?

PS
with the 4 blades I would think 850-1000 rpm HS would be possible

spending time, paying attention

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01-13-2015 12:17 AM  3 years agoPost 18
turboomni

rrProfessor

East of the Equator

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Ok I see. I can tell you from my limited experience that you find the head speed you generally like and then find the gear ratio that keeps the motor esc combo as close to 100% throttle as possible and that should be the most efficient. This is on a 6 cell on a 700E with no Gov. I run my LHS 700 at 1300 to 1400 at 100% throttle doing mild 3D and get over 10 minutes.

Setup is everything, All my heli's can fly far better than I can pilot them

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01-13-2015 12:24 AM  3 years agoPost 19
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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ah so , these LHS setups are in fact running the ESC fully open .

so how do know, how low you can go with the head speed?

spending time, paying attention

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01-13-2015 01:19 AM  3 years agoPost 20
turboomni

rrProfessor

East of the Equator

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ah so , these LHS setups are in fact running the ESC fully open .

so how do know, how low you can go with the head speed?
There are quite a few ways to skin a cat as the old saying goes.
You can run a 12 cell and with the correct gearing and motor + a "free Wheeling' esc can dip down very low and efficiently and have a wider range of head speeds. You could have a range of say 1100 up to 1700 for example. Check out the Gwright video I posted here on this forum. Here is a link. At the end he gives a full description of his setup.

https://rc.runryder.com/t776041p1/

Setup is everything, All my heli's can fly far better than I can pilot them

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HomeAircraftHelicopterLow Head Speed Helicopters › Trex 600 Conversion LHS Multirotor 1150 Rpm
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