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HelicopterScale Model RC Helicopters › 700-size Hughes on a single 6s
02-23-2017 03:54 AM  7 months agoPost 1
fastphil

rrNovice

LaPine OR and Quartzsite AZ

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...my new Hughes with TRex 700 mechanics is a real joy for me to fly as a beginner, it's big, slow and stable, and the single 6s lipo gives me just the headspeed i'm looking for and like....I am getting two 5-minute flights with a battery....

Watch at YouTube

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02-23-2017 04:44 AM  7 months agoPost 2
coptercptn

rrElite Veteran

Mesa AZ. USA

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Yep, converted a few combos like that for guys just learning...1220kv motor, and 1150-1200 hs

Home of the "Sea Cobra".....

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02-23-2017 09:26 PM  7 months agoPost 3
Richard Morgan

rrApprentice

Virginia Beach, Virginia USA

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Can you detail out your set up?

Motor KV
ESC
Battery C rating
Temps on ESC and Motor
Pitch settings, main and tail
Rotor Head Speed

Thanks

Richard

Richard

Is it just me, I thought all Helicopters flew in 3D......Hmmmm?

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02-23-2017 11:08 PM  7 months agoPost 4
TailKiller

rrApprentice

Panama City, FL

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Nice...
Take a 3D setup with high rpm on 12s and put it in a fuse on a 6s and thats what you get.. low head speed, long flights.
Try to build a low heas speed 6s bird by choosing the gearing and motor and pinion and it never seems to work out the same.. lol.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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02-23-2017 11:23 PM  6 months agoPost 5
HilliHeli

rrVeteran

S.MI./FL.

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Can you detail out your set up?
Don't forget who makes that fuse' (?)

!Antriebe, die bewegen!
Jazz', Jives & vbar's
Futaba FASST / FASSTest

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02-24-2017 03:16 AM  6 months agoPost 6
fastphil

rrNovice

LaPine OR and Quartzsite AZ

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Hi Hilliheli, Thank you for your interest, this stock helicopter is running an Align 530kv Super Power 750 motor, powered by 6s Pulse Power 5Kmah 45C lipo, CC HV120 esc, BeastX,....I set the pitch on the fly by eye, and a straight line 100% throttle curve, super slow start,... I don't know what any of the temperatures are, or RPM headspeed is, but it seems OK for me....I picked up the fuselage from RC Aerodyne, and I believe they ship worldwide.....my brother and I built two of these together as a fun project, and they both fly nicely, and we like them....Good Luck!

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02-24-2017 06:47 AM  6 months agoPost 7
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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well this looks like the stock T700 DFC version... so based on that we can do the math

100% RPM = Kv of motor x 0.9 (90% motor efficiency) x Volts / gear ratio

530 x 0.9 x 22,2 / 9,33 = 1135 RPM at the end of the flight...

this is a nice scale HS for a multiblade setup. If you only fly 2 blades all you need to do is add a few deg of pitch and you're set.

nice helicopter

gh

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02-24-2017 04:38 PM  6 months agoPost 8
fastphil

rrNovice

LaPine OR and Quartzsite AZ

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Thanks GH for figuring out the headspeed, and letting me know that it's OK for a 4-bladed head....you're right about only using two-blades, only some minor pitch is needed for hovering and/or forward flight....I picked up this 700 last year to try and learn to do more than hover right in front of me, and the first time I flew it (with two 6s) it scared me with that high HS, now i'm just thrilled with it....thanks again for the info!

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02-24-2017 07:42 PM  6 months agoPost 9
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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no problem
yes the head speed on 12S at 100% is 2270RPM. Governed at 85% (castle really likes it between 80 and 90%) gives you the headspeed of 1930RPM. That is good for pod and boom so you'll need to do something to bring it down. 12S will help your system to run cooler than if you'd use 6S but there are other options you can try to reduce HS.

Changing your pinion will have an effect (but be careful as the motor mount needs to allow for adjustments since the circumfence of the pinion will have a direct effect on the gear mesh).

you can also switch the batteries to 10S (at 85% HS will be 1600) which is perfect in my opinion...

but then again you can aslo leave as it is no the 6S system and simply enjoy the helicopter and the way it flies.

gh

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02-25-2017 02:25 AM  6 months agoPost 10
TailKiller

rrApprentice

Panama City, FL

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It think Phil is using a thr curve and fixed end points in the castle. He's flying 100% on the TX so he may have a higher HS then calculated. It would be nice to know what HS he is really turning but until he sets up gov mode eh can't tell us without a tach.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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02-25-2017 07:35 AM  6 months agoPost 11
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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well in theory he can not get a higher head speed than the calculated value "at the end of the flight"....

when you do the math you have to consider that the Voltage of the battery drops with time and that the calculated value is based on a 3,7V per cell, which is still save for a LiPo battery. When fully charged it will hold 25,2 instead of 22,2 V as used to calculate head speed.

Tailkiller is correct in stating that the HS will wary.

I would suggest using CC governor to get a constant head speed (all you need is CC usb adapter and 3 min of work) as this will give you a constant HS regardless of the battery voltage... and consequentially a longer flight time (not significantly but still).

gh

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02-25-2017 07:47 AM  6 months agoPost 12
Andy01

rrApprentice

Brisbane, Australia

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No tacho required - just look at the Castle logs. They are very useful - can see exactly what amps, RPM, Watts, ESC temp etc is throughout the flight.

I agree that a governed headspeed would be better. It is likely that Phil will see about 1270rpm at the start of the flight and around 1170rpm towards the end (depends how far the lipos are run down) using a 100% TC, whereas a governor would give him a more consistent feel throughout the flight.

Best option may be to increase the pinion by a tooth or two, and aim for around 1150-1200rpm at 95% governor.

Colin

Vario Long Ranger 700e
Seahawk 600
UH-1N 500
Baumann EC-145 800+ (coming soon )

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02-25-2017 08:37 AM  6 months agoPost 13
TailKiller

rrApprentice

Panama City, FL

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Thanks Colin.. I meant to say the HS would be higher at the start of the run. And since Phil doesn't use Gov mode.. then we could only guess the full charge pack HS without a tach. But the calculation does give you your rpm at 22.2v. Phil is just enjoying the way his heli flys. But be watchful of your batteries health flying this way. A weak pack will put you in the ground very fast.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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