Today's Message Index:
----------------------
1. 03:47 AM - Re: torque settings to lock blades (flyayak)
2. 04:25 AM - Re: Re: torque settings to lock blades (Eric Wobschall)
3. 05:54 AM - Re: Re: torque settings to lock blades (A. Dennis Savarese)
4. 10:04 AM - Re: Re: torque settings to lock blades (Walter Lannon)
Message 1
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| Subject: | Re: torque settings to lock blades |
Hi all,
sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really
a bit high)?
And by the way, the 6 nuts behind the prop flange should be tightened with 87 ft/lbs,
right?
Thanks a lot.
Stefan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331696#331696
Message 2
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| Subject: | Re: torque settings to lock blades |
87 is fine for the prop flange. be sure to use the proper calculation if you're
using a dogbone extension, which you pretty much have to. Here's a calculator
on the internet:
http://www.belknaptools.com/extcalc.asp
Looking around for the counterweight figure, and it is tight, but not that tight
as I recall (more like 40). Plus, it's a castle nut, so you don't get it right
on (could be up to 30 degrees to the closest increment). I'll post it if I
can find it.
On Feb 21, 2011, at 6:45 AM, flyayak wrote:
>
> Hi all,
>
> sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really
a bit high)?
> And by the way, the 6 nuts behind the prop flange should be tightened with 87
ft/lbs, right?
>
> Thanks a lot.
>
> Stefan
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=331696#331696
>
>
>
>
>
>
>
>
>
>
Message 3
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| Subject: | Re: torque settings to lock blades |
Yes, the torque spec I have for the prop flange nuts (22mm) is 87 ft/lbs.
Dennis
On 2/21/2011 5:45 AM, flyayak wrote:
> --> Yak-List message posted by: "flyayak"<sschne3082@aol.com>
>
> Hi all,
>
> sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one seems really
a bit high)?
> And by the way, the 6 nuts behind the prop flange should be tightened with 87
ft/lbs, right?
>
> Thanks a lot.
>
> Stefan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=331696#331696
>
>
Message 4
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| Subject: | Re: torque settings to lock blades |
Blade clamp (c'weight bracket) bolt/nut torque value is 57 to 63 lb/ft.
Torque to approx 55 lb/ft then to next cotter pin hole if within torque
limit. Torque values given for castelated nuts USUALLY allow for further
tighening to line up the next hole. BUT-------
Whether that is true of Russian/Chinese specs. I don't know! I would allow
only a very smal overtorque.l
Having the advantage of a few spare nuts I can usually get away with
selective fitting. When that fails I guage the amount of turn required
relative to the thread pitch and machine the nut base accordingly.
This is arguably the MOST CRITICAL torque value on the entire
engine/airframe combination.
Walt.
Walt
----- Original Message -----
From: "flyayak" <sschne3082@aol.com>
Sent: Monday, February 21, 2011 3:45 AM
Subject: Yak-List: Re: torque settings to lock blades
>
> Hi all,
>
> sorry, but now Im a bit confused. Is it 60 or 75 lb/ft (the last one
> seems really a bit high)?
> And by the way, the 6 nuts behind the prop flange should be tightened with
> 87 ft/lbs, right?
>
> Thanks a lot.
>
> Stefan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=331696#331696
>
>
>
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