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Old Jan 19, 2003, 01:50 PM
Craving My First Hover
Ennis, Tx
Joined Dec 2002
35 Posts
Good run of bad luck with the Corona

After building the Corona, I couldn't wait to learn to fly. I made some training gear out of wooden dowls and found a big slab of concrete to slide around on. I got about a foot off the ground (on accident) and let the throttle off to set her back down, but when she came down, I had my first boom strike. I tried to straighten out the boom by hand and it broke in half.

That day, I got to run my new heli for about 60 seconds.

Fast Forward 2 weeks (today)

My new tail boom came in and after installing it and freshly charging 3 battery packs, I was off to play. I ran her for about 60 seconds and then the Main Rotor blades starting hitting the Tail Rotor blades and before I could shut it down, One of the Tail blades snapped off.

Now I get to order more parts and wait. I've had this heli for 1 month and I've had it running for a total of about 2 minutes. I am discouraged, but at the same time, I'm determined.
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Old Jan 19, 2003, 01:56 PM
Hooked Heli Human
gmaster's Avatar
Western NC
Joined Dec 2002
1,556 Posts
how did the main rotor blades hit the tail?
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Old Jan 19, 2003, 02:07 PM
Registered User
Joined Jan 2003
10 Posts
My procedure for fixing a bent tail boom (from one of the Arlton brothers). Remove the boom from the helicopter and use a wooden dowel the same diameter as the inside of the tail boom. Carefully force the dowel through the boom. By doing this you can get the boom fairly straight or at least straight enough to use.

Hope this helps.

Scott
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Old Jan 19, 2003, 02:07 PM
Cnc-Nut
fig8's Avatar
USA, FL, Hudson
Joined Sep 2002
239 Posts
I'll bet he put the Nitro version tail boom on instead. It's shorter
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Old Jan 19, 2003, 02:48 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
If he got the nitro version of the tail, he would have had to cut down the wire drive to match it.

I think gmaster is right...there is no way the main rotor can hit the tail rotor on a properly bit Corona. Something is seriously wrong.

I took a pic of my Corona's tail...you'll see there's about two inches between the tip of the main rotor blade and the tip of the tail rotor blade.

Toshi
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Old Jan 19, 2003, 02:50 PM
Hooked Heli Human
gmaster's Avatar
Western NC
Joined Dec 2002
1,556 Posts
Toshi.. thats what i was thinking.. I remember seeing vkmaynards corona 120 and i noticed it had lots of clearance... and i have seen a lot of videos and pics...

ey8it... any way you can take pics of what your corona looks like.. give us more information..
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Old Jan 19, 2003, 03:13 PM
(aka Cliff Lawson)
Wright Flyer's Avatar
United Kingdom, Essex
Joined Oct 2001
1,897 Posts
Quote:
Originally posted by atcvector
My procedure for fixing a bent tail boom (from one of the Arlton brothers).
Hi, I've read about this boom straightening using a wooden rod a few times but just one thing I don't understand - what about the nylon bushing that are a friction fit inside the boom. Don't they get in the way? But if you remove/replace them don't they then work loose?

Cliff
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Old Jan 19, 2003, 03:58 PM
Craving My First Hover
Ennis, Tx
Joined Dec 2002
35 Posts
I don't have a camera so I can't post a pic. I did some measurements and my tail boom is about 18" long. I also measured the gap between my main blades and the remaining half of my tail blade and it's about a 1/16 of and inch (maybe less). I don't remember it being near that close when I first built it.

I never thought of checking this when I put on the new tail boom. I ordered the new boom over the phone and just assumed I was getting the stock boom.
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Old Jan 19, 2003, 04:04 PM
Craving My First Hover
Ennis, Tx
Joined Dec 2002
35 Posts
I just dug up the pieces to my old tail boom and compared the lengths. My new tail boom is exactly the same size as the old one.
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Old Jan 19, 2003, 04:08 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
Stock tailboom is exactly 17.5 inches long.


Toshi
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Old Jan 19, 2003, 04:11 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
1.75 inches of clearance between main rotor blade and tail rotor blade.

Toshi
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Old Jan 19, 2003, 04:18 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
Main rotor blades are 13 inches from tip to bolt hole.
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Old Jan 19, 2003, 04:19 PM
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San Carlos, California, United States
Joined May 2002
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Tail rotor tip to center is 4 inches.
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Old Jan 19, 2003, 04:19 PM
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San Carlos, California, United States
Joined May 2002
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19 inches from the main rotor shaft to the tail rotor hub center.
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Old Jan 19, 2003, 04:22 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
Hopefully those pics will help you solve the puzzle...hopefully it's not a local distortion in the space-time continuum...

Toshi
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