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 3 pages [ <<    <    ( 1 )     2      3     NEXT    >> ] 2009 views POST REPLY
HomeAircraftHelicopterMain Discussion › Is this damaged blades safe to use?
10-22-2009 02:49 AM  8 years agoPost 1
rudyy

rrElite Veteran

E. Amherst, NY

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I have a blade folded and it hit against the blade grip. There is damage on the trailing edge on both sides. Do you think it is still safe to use? This is a 600mm blade. The other one is perfect.

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10-22-2009 02:59 AM  8 years agoPost 2
JJMAN (RIP)

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Chesapeake, Virginia - USA

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You know what they say, if you have to ask.....

I wouldnt use them, or want to be around anyone using them.

JAY HIGGS

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10-22-2009 03:00 AM  8 years agoPost 3
jbdww

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Round Rock, Texas

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That should be OK. I have flown with blades that look like this.

Skids Up
http://www.jbdww.com
http://twitter.com/jbdww/

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10-22-2009 03:04 AM  8 years agoPost 4
xxl

rrApprentice

The planet Earth

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i would say buy new blades Its not worth chancing a separtion inflight
New blades 110 or less
New heli trip the hospital orther damages $$$$$
just trying to put a diffrent angle on it

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10-22-2009 03:04 AM  8 years agoPost 5
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Damage like that near the root is a LOT more iffy than elsewhere. That damage is right near the most important supporting structure of the blade, where nearly all the flex loading and tinsel loading is. I wouldn't use 'em.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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10-22-2009 03:05 AM  8 years agoPost 6
alexz

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shakopee mn usa

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what size blade?
Are you showing the one blades damage or are both the blades damaged?

If that were my 600, then no.

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10-22-2009 03:08 AM  8 years agoPost 7
rudyy

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E. Amherst, NY

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That is the 600mm blade with damage on both sides of the trailing edge. The other blade is perfect.

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10-22-2009 03:09 AM  8 years agoPost 8
Dood

rrProfessor

Wescanson

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Since it's on the trailing edge and not quite on the root itself, I might try and fill that in with thick CA or epoxy. I think it might be fine.

If you dont want 'em, I'll take 'em.

  ▲
▲ ▲

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10-22-2009 03:10 AM  8 years agoPost 9
jgunpilot

rrKey Veteran

Pollock, LA

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That type of damage in that area forms what is known as a "stress riser" in the secret technical jargon of rotor blade-people-guys.

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10-22-2009 03:13 AM  8 years agoPost 10
jbdww

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Round Rock, Texas

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I am going to stand in line with Dood. I will take them off your hands also. This damage is not in the stress area.

Skids Up
http://www.jbdww.com
http://twitter.com/jbdww/

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10-22-2009 03:13 AM  8 years agoPost 11
rudyy

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E. Amherst, NY

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That type of damage in that area forms what is known as a "stress riser" in the secret technical jargon of rotor blade-people-guys.
Can you elaborate more?

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10-22-2009 03:25 AM  8 years agoPost 12
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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They're carbon fiber / composite blades. Such construction derives most of its strength from the surface (carbon fiber outer shell) stiffness that the inner core (composite material) supports and stiffens from within.

If the surface (carbon fiber outer shell) is damaged, especially near the root, risk is extremely high for inflight failure due to the high loads happening there.

Smartest thing you can do is sell 'em to Dood or jbdww.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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10-22-2009 03:35 AM  8 years agoPost 13
30636086

rrKey Veteran

Tacoma, WA

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Smartest thing you can do is sell 'em to Dood or jbdww.

I dont suffer from mental iIlness, I actually enjoy mine!

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10-22-2009 03:55 AM  8 years agoPost 14
thorpdrvr

rrApprentice

san antonio, tx

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Because the outer shell was damaged, it sure looks like it will compromise the ability of the blade to handle the twisting loads (torsion). It is much more damage than the small nicks alot of people have from folding the blades a little too far.

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10-22-2009 04:05 AM  8 years agoPost 15
46Taylorcraft

rrKey Veteran

AZ

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toss them!

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10-22-2009 04:06 AM  8 years agoPost 16
bexusflexus

rrApprentice

Tulsa, OK

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I would've probably been tempted to use them myself. But I will have to agree with GimbalFan and Thorpdrvr. CF strength is derived from the outer shell which certainly could compromise the blade where that particular damage occurred. I would send them to one of the other members that wants them with the caveat that they have to video every flight

even not doing anything would have been better than nothing...

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10-22-2009 04:13 AM  8 years agoPost 17
reddragon

rrElite Veteran

Brooklyn, N.Y.

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Here we go again.
Throw the blade away and don't try to repair it. Please.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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10-22-2009 04:18 AM  8 years agoPost 18
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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i noticed it says "SAB" on them....thats an automatic toss...

Kidding.

i wouldn't use them though. a little ding on the tip or something is no big deal, but that looks pretty rough in a bad spot.

Shawn
Team Leisure-Tech
Team HelixRC

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10-22-2009 04:34 AM  8 years agoPost 19
Zaneman007

rrElite Veteran

Texas - USA

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keep them under 500 rpm and you should be fine. Just don't stand to close. Oh, and buy a warranty.

Old Guys Rule!

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10-22-2009 04:34 AM  8 years agoPost 20
jgunpilot

rrKey Veteran

Pollock, LA

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Yes, if the tips are damaged I'll flow in a little medium CA, then sand them and fly them again. Damage to mid span or root, I'll trash them. I've had blades explode on spool up - never again!

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HomeAircraftHelicopterMain Discussion › Is this damaged blades safe to use?
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