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Old 03-25-2011, 11:51 PM   #1
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Default ST Blaze tail fell off

Was flying my Blaze on a beautiful day with blue sky's and hardly a cloud. It was performing brilliantly. I was flying pretty fast but it is supposed to be a hotliner after all. Next thing I know it's not responding to my control movements. It's pretty high up and quite far away. As I initiate aturn with ailerons it's fine. Feed in some up elevator to speed up the turn and it rolls quite violently. Lost it over a building site in the end and was worried cause it's a built up area. When I got there it turns out it hit a tree on a farmyard. Two guys working on a tractor said yeah mate it's up there. Didnt half make a loud crashing noise as it hit.It had buried the front of the model in a tree and the tail was sticking out. From what I can gather the right half of the V tail had snapped off so all my elevator commands resulted in a force at 45 degrees to the tail causing it to skewer out of control. It now has a conventional tail with standard elevator on it. At least if I lose half this tail I will have a chance of bringing it home.I have insurance but was really worried in case it had hit someone in such a built up area.
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Old 03-26-2011, 10:31 AM   #2
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Sorry to read about your troubles, squidger. How old was your plane? Did it seem like a manufacturing defect?

How hard was it to convert to a regular horizontal stabilizer and elevator?

Anyhow, I'm glad nobody got hurt!

Please call me John. I came up w/ Max2112 when I thought you were all internet predators after me Lucky Charms!!
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Old 03-26-2011, 11:15 AM   #3
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It's about a year old and has been flown about 30 times I suppose. There is a vid on youtube of one flying with a rear facing camera and you can see the tail come loose and flap about so may be a model related problem. It was pretty easy to convert as the old tail just screwed on. I made a new horizontal stab and elevator out of balsa and hot glued it into position then made a fin and did the same. Then brushed a thin coat of EZ coat on it before spraying with car paint. Looks OK. Gonna test fly Monday hopefully.



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Old 03-26-2011, 11:44 AM   #4
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Obviously it's not a Multiplex blizzard were as a kit U build it and make sure things are legit! I constantly monitor my birds (post flight inspection) and that's why I can bank and YANK them to death
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Old 03-26-2011, 07:27 PM   #5
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It was fine when I launched it. I've been flying for 25+ years and am an aircraft engineer by trade so know how crucial pre and post flight checks are.
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Old 03-26-2011, 07:39 PM   #6
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looks better now
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Old 03-26-2011, 09:42 PM   #7
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It was fine when I launched it. I've been flying for 25+ years and am an aircraft engineer by trade so know how crucial pre and post flight checks are.
That would be weird for me and the tail falling, my guess too much invisible flutter or vibration in that area.
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Old 03-26-2011, 09:47 PM   #8
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Originally Posted by SmoothCruizer2 View Post
That would be weird for me and the tail falling, my guess too much invisible flutter or vibration in that area.
Well it sounds like you know what your doing and I would not think it was anything you did wrong, I would suspect flutter also.
I had a T-Tail do the same thing and someone that saw it said it looked like a blur before it came off, and ya know it just went into a flat spin right in the ground, it was the best flat spin I have ever done and i can't repeat it.
but you did do a much better job the stock on the fix.
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Old 03-26-2011, 10:06 PM   #9
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To be honest I was flying pretty fast and making quite tight turns but it is supposed to be a fast model. It would be difficult to spot flutter from the ground due to the speed of the model but I suspect it probably has been fluttering and just fatigue cracked at the base of the tail. The usual inspection and control checks before flying didn't highlight any probs. The new tail slipped slightly while the glue was going off and is a little crooked but should fly OK. There's a vid on youtube of someone flying their Blaze with a rear facing camera and it films the tail coming loose.

Here it is. Looks like a carbon copy of what happened to mine.

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Old 03-26-2011, 10:10 PM   #10
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wow, looks like a weak spot for sure.
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Old 03-26-2011, 10:34 PM   #11
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Originally Posted by squidger View Post
To be honest I was flying pretty fast and making quite tight turns but it is supposed to be a fast model. It would be difficult to spot flutter from the ground due to the speed of the model but I suspect it probably has been fluttering and just fatigue cracked at the base of the tail. The usual inspection and control checks before flying didn't highlight any probs. The new tail slipped slightly while the glue was going off and is a little crooked but should fly OK. There's a vid on youtube of someone flying their Blaze with a rear facing camera and it films the tail coming loose.

Here it is. Looks like a carbon copy of what happened to mine.

Apparently not enough preflight check going on, had the same prob long time ago on stab, now I load check everything in preflight. Just another vid to reinforce how necessary it is to check everything twice before you fly.
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Old 04-05-2011, 08:06 PM   #12
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Have finally had a chance to test fly with the new tail. She flies great.
Really put her through it. Flew as fast as I could and made some insane control inputs and no problems at all. The balsa tail is so much heavier than the vtail I removed a fairly large bit of lead from the tail and fitted to the nose but still had to add some more. Very happy with end result.
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Old 09-23-2011, 03:09 PM   #13
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Hobbyking have just released a "new" model. Take a look at the vid. Looks exactly like a Blaze but crucially they have added plastic reinforcement to the tail and carbon fibre in other areas. Definitely a Blaze though. Unmistakeable shape and classic canopy lol.

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Old 09-25-2011, 07:54 PM   #14
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300 watts! Much stiffer! Hmmmmmmmmm.
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