Sport Copter Vortex 618

Rattler 1

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Can anyone give me the realistic cruise speed on a Vortex with a 618? Mine cruises at about 60 mph at 6000 rpm. I have an E gearbox with a 3.0 to 1 ratio. Has a Powerfin Prop. I have a max rpm of 6500 in the air but fly at 6000. At this RPM I burn exactly 5 gph. Just need a ballpark so I know I'm somewhat close.

Thanks.
 

Jazzenjohn

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I've designed, built, and flown 4 different ultralight gyros. Amassing parts for a 2 place now.
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That seems a bit low to me. What diameter prop and how many blades do you have? Do you have the pod/windscreen on it? You can get a little better cruise by setting the pitch a little higher with a small sacrifice to climb performance. you could try setting the static rpm on the ground to say 6100- 6200 RPM and check the difference.
 

Rattler 1

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C150-C172-Taylorcraft-Tbird-Rans S9-challenger-Benson-Air Command-Sportcopter
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Silly but I need to check the prop diameter. I should know that. It's a 3 blade powerfin. I do have the partial enclosure on it with full windshield.
 

Rattler 1

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C150-C172-Taylorcraft-Tbird-Rans S9-challenger-Benson-Air Command-Sportcopter
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I did a bunch of testing today. The engine is a 618, gearbox is a 3-1 ratio, I have a 66" Powerfin. Static pull at 6100 rpm was 326 LBS. I changed pitch to max static RPM at 6900 rpm with the same amount of pull. 340 LBS. I reset it to 6100 rpm as in the air I got 6500 rpm.
My ground speed at 6500 RPM was about 68 MPH. Throttling back to 6100 gets me 60 MPH.
Outside temp was about 68 deg. and am at 1200 ft above sea level.

Can someone with a Vortex 582 tell me what they are getting? I do have the full windshield partial enclosure. Also larger tires.
 

BEN S

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Hmm...sorry, Mine goes from here to right about there before take off unless the winds are over 15, the it takes off right about yonder.
It seems to hover mostly in the green with some yellow, but I move the stick thing to make sure it never goes in the red....;)
When my trailer is built and I can fly again, I will see about getting you some numbers.
Currently I am grounded.
 

Rattler 1

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Well that's one reply. Not sure how accurate but I'll see if mine is the same.
 

Kevin_Richey

Yamaha gyro...Oregon, USA
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Hmm...sorry, Mine goes from here to right about there before take off unless the winds are over 15, the it takes off right about yonder.
It seems to hover mostly in the green with some yellow, but I move the stick thing to make sure it never goes in the red....;)
:LOL::ROFLMAO:
 

Jazzenjohn

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I've designed, built, and flown 4 different ultralight gyros. Amassing parts for a 2 place now.
Total Flight Time
400+
66" seems quite small a prop diameter for a 3-1 gearbox. I'd expect to find a 2.62 gearbox and a 68" or bigger 3 blade prop on something like that.
 
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