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Harlock RC Viper 140

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Harlock RC Viper 140

   
Old 08-28-2018, 06:01 PM
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F1 Rocket
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Default Harlock RC Viper 140

Just finished and shipped this very cool little Viper Jet from Harlock RC. These are available from Jag RC here in the USA.

Jets Munt Merlin 70
bavarianDEMON Cortex Pro
Jeti REX 12
Jeti MSpeed
Jeti MUI 30
MKS HV69 (flaps, nose wheel) HV93 (ail, elev, rud)
Xicoy ECU telemetry
Intairco Mini UAT
Electron ER-30




Danny

Last edited by F1 Rocket; 08-28-2018 at 06:05 PM.
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Old 08-29-2018, 05:50 AM
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Thanks a lot Danny and the team at the “Rocket Factory” ... Can’t wait to fly it over the Labor Day weekend. Will post after maiden...

David
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Old 08-29-2018, 05:59 AM
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I really love mine and a K45 is plenty so you're going to have a ball
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Old 08-30-2018, 07:59 AM
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A few pics of mine....





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Old 08-30-2018, 10:17 AM
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I will maiden mine tomorrow .. The M70 runs perfect... Danny and the team did an awesome job...
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Old 08-30-2018, 11:36 AM
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Is the consensus still to use the stock retracts.struts for paved runways, but use the Electrons ER30 for grass field use?
Are the stock units from JP?

It seems like a great airframe value for $629…
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Old 08-30-2018, 11:39 AM
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The "stock" retracts are HSD and I would upgrade them, or at least the nose strut, for regular ops off of grass.
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Old 08-31-2018, 09:38 PM
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Today I maiden the mini viper. Had seven flights on it. What an amazing little jet. The CG was set at 115mm.. it needed a few clicks of up elevator in all flight modes and a couple of clicks right aileron… and this jet was flying at 199++ mph on M70.
The take off speed was so high the electron gears could not retract fully. I had to lower travel rate of throttle for “Take-off” mode to 60% (almost 45N turbine power) for the retracts to complete cycle.

Once in “cruise mode” this little jet was ballistic. Landing was very gentle. I had flaps at 50mm and 3-4 mm crow…

Danny and the team at “Rocket Factory” did an awesome job of assembling

David



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Old 09-01-2018, 02:37 PM
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What was the flight time? The tanks seems a little small for a 70.
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Old 09-01-2018, 06:11 PM
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Originally Posted by why_fly_high
What was the flight time? The tanks seems a little small for a 70.
I get like 4-4:30 min ..based on throttle management.. land with 25% fuel in tank. I have not measured the capacity but I it seems to be around 1.0L (maybe less). In my experience "M" engines are more efficient than "K" engines...

PS... a wing tank will help flight time..

David
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Old 09-01-2018, 07:25 PM
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Danny Why not bus into the cortex pro?
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Old 09-02-2018, 12:42 AM
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This one is setup EX Bus from the REX 12 to the Cortex Pro with PWM out. In this mode the flight control surfaces and nose wheel steering are connected direct to the Cortex Pro. In affect the Cortex Pro is acting as a channel expander. With the REX 12 it is possible to get 19 channels. Just another cool feature of the Jeti/Cortex Pro combo
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Old 09-02-2018, 01:07 AM
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Originally Posted by F1 Rocket
This one is setup EX Bus from the REX 12 to the Cortex Pro with PWM out. In this mode the flight control surfaces and nose wheel steering are connected direct to the Cortex Pro. In affect the Cortex Pro is acting as a channel expander. With the REX 12 it is possible to get 19 channels. Just another cool feature of the Jeti/Cortex Pro combo
It works very well... seamless on the transmitter and servo adjustment
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Old 09-02-2018, 06:05 AM
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Ok gotcha, it looks like it pwm in and out time it’s all those wires .
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Old 09-02-2018, 07:13 AM
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Actually just two wires between the REX 12 and Cortex Pro. One for EX Bus and the other for addition Power. The rest are all servo extensions. It’s a tight space to work in but this makes it fun to get everything organized so it fits and is easy to service.
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Old 09-02-2018, 07:42 PM
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Using the same rx/gyro setup in my Viper Jet. Works great!
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Old 09-07-2018, 04:46 AM
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What ended up being your final weight before fuel? I am at 9.88 lbs but it is tail heavy. I am using a swiwin 60. almost finished can't wait to get in the air.
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Old 09-07-2018, 08:58 AM
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Originally Posted by Toxic Al
What ended up being your final weight before fuel? I am at 9.88 lbs but it is tail heavy. I am using a swiwin 60. almost finished can't wait to get in the air.
The one I built is 10.25 lbs dry and needed approx 4 oz nose weight with the CG at 115mm from the leading edge of the wing where it joins the fus.

Danny
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Old 09-07-2018, 11:24 AM
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Originally Posted by F1 Rocket


The one I built is 10.25 lbs dry and needed approx 4 oz nose weight with the CG at 115mm from the leading edge of the wing where it joins the fus.

Danny
And it flies great with M70... so happy with this jet
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Old 09-07-2018, 03:20 PM
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Thanks Danny, at least I am not way off. I will be in the air soooon!
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Old 09-26-2018, 06:07 AM
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@LAjetguy when you can, Can you post pics of the landing gear install? The electrons are not bolt in.

cheers
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Old 09-26-2018, 06:15 AM
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Neither gear is really bolt in but the mounts have to be backed up and extended slightly inward for the Electrons.
Mine has the HSD Gear. They work fine but def. not Electron Quality, mine is a 12S EDF setup.
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Old 09-30-2018, 10:43 AM
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Originally Posted by F1 Rocket
Actually just two wires between the REX 12 and Cortex Pro. One for EX Bus and the other for addition Power. The rest are all servo extensions. It’s a tight space to work in but this makes it fun to get everything organized so it fits and is easy to service.

Do you have use port 4 on the Cortex for additional power?
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Old 09-30-2018, 12:05 PM
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Originally Posted by DepecheMode101
Do you have use port 4 on the Cortex for additional power?
In this installation the additional power is connected to port A of the Cortex Pro.
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Old 09-30-2018, 12:18 PM
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Originally Posted by F1 Rocket


In this installation the additional power is connected to port A of the Cortex Pro.
thank you
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