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mhubel
Joined: 05 Sep 2009
Posts: 141
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 Posted: Mon May 02, 2011 5:29 am Post subject: Real bolt failure count? |
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Does anyone really know how many failures have occurred that were not
caused by poor maintenance? Pete suggested that there were only three
bolt failures. This suggests more. It also begs the question of the need
to use Loctite. I would consider the use of Loctite a liability as it
increases the risk of not properly torquing the bolts.
On 05/02/2011 1:20 AM, Thruster87 wrote:
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A local flight training center that has been using Jabiru aircraft for the past 12yrs, swears by the new nut modification,they found that the new nuts can be torqued more easily [the small nuts feel like they are going to strip the threads during torquing] and since doing the SD have NOT had any more issues.Also they have a wobble bar [10"] which they ground to move about 10 deg and they ground the socket walls so it would fit in.This way NO need to remove any bits from the engine.The jury is still out on the need to use loctite,as without it it would make it a lot easier to re-torque the nuts/studs. Cheers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=338613#338613
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--
Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel(at)nemon.com
978-443-3955
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_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
Pictures at photo.hubbles.com |
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Afterfxllc(at)aol.com
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| Posted: Mon May 02, 2011 11:41 am Post subject: Real bolt failure count? |
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Just another Jab problem that could be fixed but they seem to think problems don't exist. One question I have is, if the bolt is failing why change the nut? I think they have a nut failure problem and they think a stronger nut is the answer. WRONG [quote][b]
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Thruster87
Joined: 16 Apr 2008
Posts: 193
Location: Australia
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| Posted: Mon May 02, 2011 1:42 pm Post subject: Re: Real bolt failure count? |
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By using the new nut you are gaining almost a 50% increase in thread take up,thus the load is less per thread which in turn reduces the chance of breakage.Longer studs /bolts are available if so desired. Cheers
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