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HelicopterHIROBOHirobo SDX › 120 or 140 swash mix
12-29-2009 01:26 PM  7 years agoPost 1
arhennie

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Norway

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I'm about to build my first Hirobo heli. The SDX. I would like to got for the 135 swash mix, but my JR DSX9 only support 140. Can I use that or should I stick with 120?
Anyone with experience on this out there...?

arhennie

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12-29-2009 01:42 PM  7 years agoPost 2
davidevo50

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Montreal, PQ, Canada

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There is a thread about this somewhere, but yes you can go ahead with the 135 degree set up... Just make sure you tap the holes in the swah before installing the ball ends.

Have fun!

LIVE IN THE NOW!

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12-29-2009 03:02 PM  7 years agoPost 3
rexxigpilot

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Florida

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135 and 140° are the same setup. Although it is a bit confusing to be using different degrees, the key difference between these and 120° setups is the distance the link balls are from the center of the main mast in the forward to aft and port to starboard directions. Simply put, the servo throws are equal distance in front and in back when using elevator, and side to side when using aileron. This eliminates the complex mixing that must occur in the TX when using a 120° setup. The 135/140° setup is inherently interaction free in a properly designed heli.

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12-29-2009 03:07 PM  7 years agoPost 4
MRC-Hirobo

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Edison, NJ

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The 135/140° setup is inherently interaction free in a properly designed heli.
And the SDX is a properly designed helicopter

I agree. The 135-140 is the same so you would be fine and I would set your helicopter up that way.

MRC Host

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12-29-2009 09:16 PM  7 years agoPost 5
arhennie

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Norway

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Thanks everyone for all your feedback. I will use the 135/140 setup.
I also noticed in anoother tread here, this issue regarding tapping the swash. I will take care.

Another question while talking about the swash. (A little OT but so what...)
Do anyone have experiance with the Hirobo plastic in cold weather?
I'm talking between -5 and -10 degrees celsius.
(I have some very bad experience from last winter with a Logo 500...)

arhennie

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12-29-2009 10:02 PM  7 years agoPost 6
payne1967

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uk

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my sceadu and freya 90 (both the mk1 versions) handle the cold ok
even with 8 year old plastic on the sceadu

didn't you know what you pay the little extra in the kit price for?
the quality of the product
in design and its parts

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12-30-2009 12:30 AM  7 years agoPost 7
davidevo50

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Montreal, PQ, Canada

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-10 Celsius is not a problem even with a light wind(so let's say -15 with the wind factor), I've been doing it for 5 winters now with no problems so far with an EVO 50 a SDX and a Trex 450 SE.

Enjoy the SDX it's an incredible machine!

LIVE IN THE NOW!

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01-01-2010 01:48 PM  7 years agoPost 8
AAKEE

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Boden, Sweden

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I live in nothern sweden(about artic circle i 'height' so I fly a lot in rather cold weather...

The wind factor doesnt apply to things, its just for living things.
(and if it would , the wind factor shold make it very could doe to the speed of the moving parts + the airspeed of the heli).

Hirobo plastic doesnt get any problems in cold weather. Havent crashed yet so I dont know, but of course it probalby easyer to break at cold weahter.

One thing is affected ont the heli. The plastic ball link shrinks more than the ball, so the ball link jams on the the ball in cold weahter. New thight links could possible jam so much that you notice it in flying. (with my trex450 its very noticable so i have more sloppy ball links for winter flights).
On the evo50 and SDX i put them outside for 30minutes in the lowest temperature I would fly in, and then check the ball links. If needed I grind them with a ball link rimer. I also check with the radio system on for servo movement and speed, se below:

Worst problem could come from servos with metallic gears, they (at least Futaba and Hitec) use a grease that almost freeze in cold weather. In some servos(hitec 65mg or 5065mg) we take away most of the grease to prevent them from slowing down from cold. (a friend chrasched his trex450 a few times due to slowing servos on the swash, different slowing made the swash do roll and ptich actions when applying pitch.)
On the evo50 i once got a very slow pitch speed (HPM with a futaba 9351), havent flown the SDX(bls253) to lower thsn -8celcius yet so I down know yet how the bls253 on SWM will be affected.

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01-01-2010 02:12 PM  7 years agoPost 9
davidevo50

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Montreal, PQ, Canada

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At -10 Celcius my my Bls253 seemed fine, and I'm sorry but I don't see how the wind factor would not affect things as welll...

Happy new year!!!

LIVE IN THE NOW!

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01-01-2010 02:52 PM  7 years agoPost 10
rexxigpilot

rrProfessor

Florida

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Wind chill factor is a measure of how cold it is on the skin due to the loss of heat caused by evaporation of perspiration. Only living organisms that perspire (mostly mammals) are affected. Materials such as plastic, steel, etc. are unaffected as AAKEE stated.

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01-01-2010 02:57 PM  7 years agoPost 11
davidevo50

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Montreal, PQ, Canada

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Realy? Wow... We learn every day!

LIVE IN THE NOW!

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01-01-2010 07:45 PM  7 years agoPost 12
arhennie

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Norway

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Good to hear about the good experience you people have with the SDX in cold weather. Ofcourse it can withstand less in a crash, but my worry was if the plastic might break in flight.

Only thing I havent received my SDX yet. I guess it's been delayed in the post during the holydays. Motor and electronics are laying on the workbench waiting for it. And I was hoping to receive it time to build it during christmas.

All christmas it have been around -20'C where I live. Thats too cold for me to go flying, but it would have been perfect for sitting in the hobby room preparing this thing.

Tomorrow it's expected "only" -10, and I am planning taking out one of my smaller electric heli's. Its between 60 and 70 cm. of soft snow, so it will be like flying with a safety net...

arhennie

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HelicopterHIROBOHirobo SDX › 120 or 140 swash mix
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