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Ace Hobby . Thunder Power RC . Mikado Modellhubschrauber

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Scale Model RC Helicopters > Proud Owner of Cobra 60
 
 
GrantL
Veteran
Location: Springfield, MA

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Nice pictures Jan.. Thanks.. 11.5lbs sounds bout right..

Grant
11-16-2009 09:18 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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I'm impressed with the performance so far. I've never owned a scale ship before, I had a big Schluter 60 and a couple of 30 sized ships, and a BUNCH of T-rexes so I was a little unsure of what to expect.

it hasnt done anything that I thought was strange, (except of course the wacky gyro and tail stuff) . But after talking with the Doc, I am going to go with the bigger tail blades, because I am almost out of rudder travel to hold the nose straight. Now with that small amount of travel I can still have full control of yaw going nose right.

After being out at the Army site yesterday, there is one scale detail I completely forgot about, the airfoil shape of the vertical tail. There is a concave on the left side, convex on the right so if they lose the tail rotor they can do a run-on landing. Being a pilot myself I dont think I would want to try sliding along on those skids. Seems like it would be a wobbly little goblin before it came to rest. Guess it beats crashing

BTW, in a similar story our local "captain Scotty" news helicopter guy had a TR out incident here in Fresno about 10 years back. The whole thing was recorded too, and they played it back on the news (over and over and over) . It was a little robinson, and the fuel cap came off in flight, went back and took out the tail rotor. He was screaming "OMG I'm dead" into the mike as the thing spun out of control. Fortunately for him it came down in one of Fresno's many ponding basins that was full of water. About 30 feet deep. He walked (swam) away, the little Robinson wasnt so fortunate though.
11-17-2009 06:53 PM
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fran
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Location: SOUTH CAROLINA

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Jan..I too was a pilot in Vietnam and let me confirm that auto rotating in a real

emergency isn't a calm experience at all; how, ever during the time before the ground comes up; you really don't have time to think at all.

However, after you land, you thank GOD that he had spared you. Hat's off to the pilot you spoke about. A lot of pilots out there; but, not so many that have experienced that (no t/r at all).

Thanks again for the info!

FRAN SR. FAI-F3C !!!! (I'm the real RR "fran")
11-17-2009 07:04 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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today one of the ex-army guys at work wanted one of my flightline pictures on his desktop, so we downloaded it to his computer and set it as the desktop.

So then this other guy at work looked at it and the 2 of them got into a short argument over whether it was a real cobra sitting on the flightline with the other 2.

funny!
11-18-2009 03:40 AM
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fran
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Location: SOUTH CAROLINA

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speaks volumnes for the work you've done on this project!!



FRAN SR. FAI-F3C !!!! (I'm the real RR "fran")
11-18-2009 04:11 AM
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sliderx
Senior Heliman
Location: Meteghan,Nova Scotia, Canada

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If it was not for the flybar you could hardly tell. Nice.

Raptor 30 V2
11-18-2009 10:41 AM
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GrantL
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Location: Springfield, MA

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Congrats Jan.. No better compliment than that..

Grant
11-18-2009 12:07 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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more video coming this weekend. weather allowing....
11-19-2009 03:58 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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hey Fran did you get yours yet?
11-20-2009 07:13 PM
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fran
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Location: SOUTH CAROLINA

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It's coming soon !!

Can not wait to get started; but, not looking forward to the sanding!

FRAN SR. FAI-F3C !!!! (I'm the real RR "fran")
11-20-2009 07:54 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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for the big thick stuff get yourself a wood rasp and just dont lean on it. you can shave away quickly, then when you get close to the shape you can step up to 100 grit or 180 maybe.

really the only aggressive shaping is the back end of the trans housing. You may want to consider joining the front half of the trans housing with the canopy section, like the new W cobra is. You can see my W cobra build pics and see how it is done
11-20-2009 08:07 PM
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fran
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Location: SOUTH CAROLINA

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Man I do appreciate you tips and help!!

I'm sure I'll have a group of questions for you later.

FRAN SR. FAI-F3C !!!! (I'm the real RR "fran")
11-20-2009 08:12 PM
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GrantL
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Location: Springfield, MA

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Fran.. Sanding is the best part.. You'll love it..

Grant
11-21-2009 04:56 PM
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Dr.Tim
Key Veteran
Location: Mojave Desert

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Yep!! It's a ZEN THING!!

Dr.Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering .
11-21-2009 04:59 PM
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WrenFlyer
Senior Heliman
Location: Aberdeen, MS USA

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I used a 1/4 sheet electric sander for roughing it in, and then hand sanded to the final shape....works great and fast to boot!

Alan Haney
11-21-2009 10:52 PM
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GrantL
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Location: Springfield, MA

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Hey Alan, no fair.. You're supposed to sand by hand..

Grant
11-21-2009 11:02 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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I started with one of those and didnt like the feel of it. So I went with that wood rasp.

I got 3 more flights in today, I will have video up shortly. Now that I have the tail locked in and the 90 raptor TR blades I am able to start sorting out the pitch/power curves. The way I have it now I am getting a gentle climb at 3/4 power but when I push the stick all the way forward I am bogging. It was really windy today and it behaved pretty nicely.

on the one video I just set the camera tripod up and tried to keep in view where I thought the camera was looking. Flew out of view a few times. Oh well. The onboard camera shows that I have a lot more vibration this time. I need to get the thing dialed in and check the tracking next.
11-22-2009 01:49 AM
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fran
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Location: SOUTH CAROLINA

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Jan...it could be from head speed (too low or not high enough)

Let me know what you come up with...on the vibration

FRAN SR. FAI-F3C !!!! (I'm the real RR "fran")
11-22-2009 05:27 PM
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jzanutto
Senior Heliman
Location: Fresno, CA

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I am beginning to think that my exhaust extension might be restricting my engine's performance. I am going to try a different exhaust exit

here is the tripod mounted camera. no one was operating the camera so you will see it go out of view a couple times

http://www.youtube.com/watch?v=2zRQVU9J5wU
11-22-2009 07:36 PM
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GrantL
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Location: Springfield, MA

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Nice video Jan.. You're almost there...

Grant
11-22-2009 08:02 PM
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Scale Model RC Helicopters > Proud Owner of Cobra 60
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