Today's Message Index:
----------------------
1. 07:26 AM - Propeller? Gearbox? Wow-wow-wow (JonathanMilbank)
2. 07:40 AM - Re: Re: Fuel Tank Fittings (Roger Sheridan)
3. 09:14 AM - Re: Fuel Tank Fittings (Rowland Carson)
Message 1
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| Subject: | Propeller? Gearbox? Wow-wow-wow |
The title more or less says it all! The engine is a 912ULS with 600 hours total
and the propeller is an Airmaster which is serviced/greased every 100 hours as
specified and is well balanced. The carburettors are regularly checked with
a CarbMate electronic synchroniser and maintained as perfectly matched as possible.
The aircraft is delightfully smooth to fly, yet there is a "fly in the ointment".
During the last 50 hours or so of flying, a constant "wow-wow-wow" sound, akin
to that of a piston twin aircraft with unmatched rpm, has gradually increased.
For most flights since the sound first appeared I could level off in the
cruise, select "Manual" on the propeller control and reduce engine speed to about
4700 rpm, which reduced the sound oscillation to almost nil.
But recently it has become more intrusive, to the extent that further reduction
of engine rpm doesn't eliminate the problem. So I'm thinking of removing the
gearbox and getting it checked over professionally, in case the dogs or their
springs could be the culprits. By the way whenever I do the friction torque check,
it always results in a reading of around 45 to 50 N-m.
Within the last approx. 20 flying hours I've replaced 2 exhaust springs in different
locations, which might be indicative of undesirable vibrations
Any advice please before I resort to gearbox removal. I've done it before and know
what's involved, but if you believe that it might be a wasted exercise please
tell me soon, thanks
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496910#496910
Message 2
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| Subject: | Re: Fuel Tank Fittings |
Whoops that was meant to go direct, not to the list.
> On 17 Jun 2020, at 21:06, Roger Sheridan <rogersheridan@mac.com>
wrote:
>
> Hi Jim,
>
> Awesome.
>
> Does that mean you seriously considered alu fuel lines then chose not
to!!
>
> I see pro=99s & cons to both systems.
>
> What is super disappointing is the fuel smell I get using Gates
Barricade from Amazon
>
>
https://www.amazon.com/gp/product/B00498G5QC/ref=ppx_yo_dt_b_asin_title_
o02_s01?ie=UTF8&psc=1
<https://www.amazon.com/gp/product/B00498G5QC/ref=ppx_yo_dt_b_asin_title
_o02_s01?ie=UTF8&psc=1>
>
> I sometimes wonder if it is counterfeit?
>
> A UK supplier shows white liner which is not noticeable on my hose.
>
>
https://www.moss-europe.co.uk/fuel-hose-gates-barricade-ethanol-proof-5-16
-id-per-metre-gfh1031x.html
<https://www.moss-europe.co.uk/fuel-hose-gates-barricade-ethanol-proof-5-1
6-id-per-metre-gfh1031x.html>
>
> Your opinions are of interest!
>
> Regards,
>
> Roger.
>
> PS Flew my classic into RAF Waddington today, launch point for the dam
buster raids!
>
> <IMG_5583.jpeg>
>
>> On 17 Jun 2020, at 16:43, h&jeuropa <butcher43@att.net
<mailto:butcher43@att.net>> wrote:
>>
<mailto:butcher43@att.net>>
>>
>> Roger,
>>
>> If you can't find them in the UK, I'm pretty certain I have them.
>>
>> Jim
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=496882#496882
<http://forums.matronics.com/viewtopic.php?p=496882#496882>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
Message 3
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| Subject: | Re: Fuel Tank Fittings |
On 2020-06-17, at 11:08, Roger Sheridan <rogersheridan@mac.com> wrote:
> I hope to find two of these fuel tank outlet fittings originally
produced for Graham Singleton in mod 10823.
Roger - I turned up my own versions of these from aluminium bar stock -
see:
http://www.rowlandcarson.org.uk/aviation/europa_435/making_tank_adaptors.p
hp
and
http://www.rowlandcarson.org.uk/aviation/europa_435/tank_adaptors.php
and
http://www.rowlandcarson.org.uk/aviation/europa_435/tank_adaptor_c_fitted.
php
Sorry, I don=99t feel I want to spend the time on making them
again just now, but if you are really stuck I might consider it!
Alternatively, if you know of or can find a model engineering society in
your neighbourhood one of those guys might be happy to do the job for
you. I attach my dimensioned drawings of the 3 slightly different
adaptors I made. I didn=99t bother to mill flats on them as I
didn=99t have a milling machine at that time and (although
possible) it would have been a bit tedious doing the milling on the
lathe.
Hope this is of some use.
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson@gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
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