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HomeScaleAircraftHelicopterScale Model RC Helicopters › Vario 1/4 hughes 500e update
02-20-2013 01:55 AM  5 years agoPost 21
cabojay

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Kenosha, Wis.. USA

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Awesome
Very nice build, You put a lot of time in and it looks like it was well worth it.. Great job.. Good luck. Jay

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LCRCC Vice President

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02-20-2013 05:51 AM  5 years agoPost 22
FelixGiant

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Ariccia - Italy

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maiden - Test 1
Nick that looks great and rock solid, looks everything is going well and no big issues. looking forward next flight. One of the good thing in electric is that there's no vibrations and everything hold together better.

Happy for your achievement.
Gianluca

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02-20-2013 06:35 AM  5 years agoPost 23
Keygrigger

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Mississauga, Ont. Canada

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Nice build so far. I see the take-off was not what you were used to. I had the same thing happen to me when I took off my first counter-clockwise rotating heli. I have not done one since and even though my 500 has the tail rotor on the left side, it is still a clockwise rotating head. I like the size of that but I could not get it around the corner into my work room. I'm jealous. Take care.

Don

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02-20-2013 08:29 AM  5 years agoPost 24
kiwiheli

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NZ

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Thanks for your comments guys.
Keygrigger, it's not only that the take off was something I wasn't use to like you said, but the big thing is I wasn't sure what to expect from the 1st flight and build

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03-06-2013 11:44 PM  5 years agoPost 25
kiwiheli

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NZ

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test flight info
After 16-17min over 3 separate flights, this is the info I have.

flight time 6m 15sec

Outside temp 9.6 dedress = 49.28F

After landing

Still have 3.81 volts per cell

Motor Temp = 32.5 - 34.2 deg = 90.5 - 93.2F
ESC Temp = 27.1 - 29.9 deg = 80.7 - 85.82F
Batt Temp = 29.9 " = "

VM: Volt trop = 41.74
AH: Amp Hours = 2.463
Ap: Amp Peak = 51.85
Wp: Watts peak = 2177
Wh: Watts Hours = 109.2

Max RPM 1284
AV RPM 1266

ESC is set at 95% so not much head room but everying is running cool and well.
If I bring the ESC to 90%, the head speed will be to low and not nice to fly for the weight of is heli.
The heli is around 12Kg 27-28 pounds.

People say that your ESC should run around between 85-92% depending on your ESC/motor/V setup. I have the Robbe Roxxy 120A with a X-era 300Kv motor, 12s 9000mAh to give me a head speed no more then 1270Rpm from Vario recommendation. The numbers look good for me and the heli fly's great, the only thing I could change would to be going for a 330Kv motor or making the heli Lighter somehow or changing the main gear. What do you guys think???
Nick

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03-07-2013 12:19 AM  5 years agoPost 26
Keygrigger

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Mississauga, Ont. Canada

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A lot is going to depend if you are going to upgrade the rotor to a 5 blade head or not. If the heat does not give trouble now, it will if you put a multiblade head on it without some changes. If the recommended rotor speed is what you have it at now, I don't think you will need to change a thing. If some have suggested that a lower speed would be better (under 1150rpm) then a change in motor and gear would be in order.

I was sort of under the impression that as the size gets larger, the rotor speed starts to drop and fairly quickly. I am also sure that with a muliblade head, you will not need the rpm you have now. My 600 TOW Defender is hovering and close quarter flying with 1300 rpm and its weight is 16 pounds. I have a maximum setting of 1400 rpm but I have not gone there yet. Maybe tomorrow or Friday but something tells me I will not need the speed. Hope this helps you out.

Don

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03-07-2013 12:45 AM  5 years agoPost 27
kiwiheli

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NZ

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Keygrigger,

Hi, No I will be staying with the two blade head for a while. The blades are 840MM lift section blades so the RPM should stay around the recommended H/S I guess, but looking at the Vario books if I add 840X2 = 1680mm rotor diameter that gives you a recommended MAX RPM of 1350 RPM but if I include the blade girps from bolt to bolt adding 180mm the hole rotor diameter is now 1860 and Vario dont have that diameter in the book, they only have
1670-1680 = 1350RPM
1780-1810 = 1270RPM
1880 = 1000RPM

ETC.

Joe from Vario said no more then 1250RPM, so I'm going from what he is recommending.

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03-07-2013 01:45 AM  5 years agoPost 28
Keygrigger

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Mississauga, Ont. Canada

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It is hard to say what they are using whether it is the blade dimension or blade and head. If Joe is recommending no more than 1250, I would stay with that. As long as you have constant rpm to the end of your flight, there would be no real good reason to change up anything.

Later, if you feel that although the rpm is good but the power is lacking, a slightly faster motor with a slightly smaller pinion may be the answer. I don't have all your specs, but upping the motor to the 330kv and dropping a tooth on the pinion should keep you at the same speed so it is a viable answer if you feel you are lacking power. Take care.

Don

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03-07-2013 03:08 AM  5 years agoPost 29
kiwiheli

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NZ

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The motor has the power 3500W - 7000W peak, it's just the ESC at 95% that i'm wondering about. Nothing is running hot and everything is way in it's capable limits. I'll keep flying and do some more test and hope for the best.
Nick

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03-07-2013 04:28 AM  5 years agoPost 30
Keygrigger

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Mississauga, Ont. Canada

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Looking at the temperatures you are getting, I would not be too worried about the heat. I do see that it is fairly cool out and that will also tend to give you lower than average temperatures. I need to figure out how to use my logging in my DX18 as I am not one to look at the screen while flying for the telemetry data. I know that when mine is running indoors in 65 degee temps, the motor runs at 135 degrees, which is actually fairly cool. When I ran it in the chassis outdoors in 37 degree temperature, the motor was actually cold when I landed it and the only thing that got warm was the single 4000mAH battery that I was using back then. I am now running a dual 8000mAH pack and they barely get above room temps since the draw on them is now less than half of what it was when I only ran it on a single.

As it gets warmer, you will get a better idea of what it really will be doing. We are starting to get into our spring and you are just getting into your fall so it will be a little while before you will get full-on hot temps. You mentioned that at 90% throttle, the head speed is too low but never said what it was. Could it be that you are just getting used to this heli and that the speed seems too low? I thought that on my Jet Ranger, 1400rpm was too slow and that it should be at 1500rpm. As I got used to slower speeds on my AS350, I lowered the Jet Ranger's head speed and found it was actually more pleasant to fly. It also reduces forward speed which is what I really want to do and make it look like a full size helicopter in the air. Weight of my MD500 will help in this respect but I need to get it in the air, soon.

Good ESC's manage the converting of heat a lot better than average ones. I have a Jazz 55 that was in the Logo chassis and as a pod and boom 550 size heli, even after hard flying, it never got hot. I also lowered the speed in its built in governor with the throttle flat lines and even at 1500 rpm turning 600mm blades on a stretched boom(normally it ran around 2100rpm), the ESC never got hot. It had a large heat sink on it and I would imagine that the fan on yours would barely be needed, but it is there for insurance by the factory for very heavily loaded helicopters. I am sure you can add 5 more pounds to that helicopter and the power system would not even flinch. Take care.

Don

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04-05-2013 12:43 AM  5 years agoPost 31
kiwiheli

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NZ

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Well it's amazing what fine tuning can do.
New data numbers.
Final heli weight = 10.8Kg = 23.8 pounds
Amps peak = 36.6
Watt peak = 1602
BEC = 25 degress = 77F
motor = 37 " = 98F
esc = 29 " = 84F
RPM 1264-1280 @ 92.5%

The heli is painted but not to the scheme that I wanted because I could not justify $800 NZ dollars, so I went with this one. Still need to finish off the red and white tail blades and putting the lights in. I'm getting some rego stickers etc made for it so they will go on to give it a little more colour. New video.
Thanks for watching,
Nick.

Watch at YouTube

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04-05-2013 01:04 AM  5 years agoPost 32
Keygrigger

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Mississauga, Ont. Canada

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Looks good. It's amazing the difference in size between the 1/6th scale and 1/4 scale when put side by side. For sure, I could not get that heli around the corner to my work room. Sigh.

Don

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04-10-2013 01:25 AM  5 years agoPost 33
kiwiheli

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NZ

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She's Finished:)
She is finally finished. Apart from putting the lights in, but you guys know how lights work.After 1 year and 2 month it's DONE! The wife will be happy, no more part arriving from Joe,etc. Big thanks to all the Guys that have helped me over the year. Here is another new video but sorry that you miss out on the landing the camera batt died, it's ok I did'nt crash the heli and edited it out lol.
Thanks for watching and happy flying.
Nick

Watch at YouTube

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04-10-2013 08:23 AM  5 years agoPost 34
PETER ROB

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Devon UK

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She's Finished
Nick, There is enough room to fit a cockpit, will you be fitting one,
Liked the flying, when are you going to reduce the gyro gain, or fly out of heading hold,
It would soften the wag you have in the tail
Peter R

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04-10-2013 10:09 AM  5 years agoPost 35
kiwiheli

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NZ

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Hi Peter R,
I wont be putting a cockpit in this heli. There is no tail wag when the heli is in forward flight or in hover, the camera for some reason distorts the image from time to time when I upload it on youtube Now the tail kick on takeoff, yes I need to look at thatGyro gain? another thing to look at. I'll try to hover it in rate mode and find the centre of the tail (servo) and then put it back in heading hold then hope that on takeoff it will not move. Still playing around with everything and I've never tried flying in rate mode, I'll give it a tryThanks for your comments.
Nick.

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04-10-2013 10:37 AM  5 years agoPost 36
PETER ROB

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Devon UK

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tail kick on takeoff,
Nick, Never had a scale heli, (in gain mode) that did not need correction on take off,
In heading hold, with too high a gain, will some times get a kick, reason for me never flying in heading hold
I like scale helicopters to fly like the full side
With a new built model, it takes a while to get every thing sorted out, take your time, and it will only take, small corrections, for the flying conditions on any day
keep posting
Peter R

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06-03-2013 03:06 AM  5 years agoPost 37
kiwiheli

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NZ

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Electro Dynamic sunlight Nav Light

Watch at YouTube

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11-13-2013 08:12 PM  4 years agoPost 38
kiwiheli

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NZ

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Blades painted
New video will follow.

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11-13-2013 08:19 PM  4 years agoPost 39
Ironside

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Baltimore, MD

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Beautiful machine!

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11-14-2013 03:56 PM  4 years agoPost 40
coptercptn

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Mesa AZ. USA

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Very nice to see how your investment of time has paid off! Beauty!!

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

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HomeScaleAircraftHelicopterScale Model RC Helicopters › Vario 1/4 hughes 500e update
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