Today's Message Index:
----------------------
1. 12:58 AM - Re: Arplast Propeller problems (John Wighton)
2. 01:10 AM - Re: Re: Mono landing gear frame (Peter Jeffers)
3. 01:22 AM - Re: Re: Arplast Propeller problems (Peter Jeffers)
4. 04:58 AM - Re: Re: Arplast Propeller problems (davidjoyce@doctors.org.uk)
Message 1
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Subject: | Re: Arplast Propeller problems |
The PV-50 and other electric VP/CS props are designed for light weight and a relatively
low hours life before overhaul/replacement. Most spam cans with CS props
use hydraulic fluid driven by a pump - this by definition does not work at
all without the engine running to provide hydraulic pressure.
So, is it unreasonable for the PV-50 and Airmaster types to restrict the normal
operation to engine running only (except for maintenance and setup)? Perhaps
not.
Looking at SUMMARY OF PROPELLER DESIGN PROCEDURES AND DATA. VOLUMEs 1, 2 and 3
it is evident how complex the aerodynamics, loading and consequent analysis can
be.
Any propeller system should be able to withstand loads imposed for maintenance
and troubleshooting. If the design is such that accumulated detritus results
in component overload - the design is not robust and it is questionable whether
it is fully fit-for-use.
I recommend following the maintenance requirements of the propeller. If, following
the work, problems still exist it may be a case of replacing suspect items.
My own experience is limited to Airmaster - the earlier version which l use does
require periodic attention to the brushes (these seem to stick and sometimes
wear unevenly), prop backplate (contact quality and cleanliness) and the earlier
motor is somewhat slow (later ones being much quicker stop to stop).
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486817#486817
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Subject: | Re: Mono landing gear frame |
Hi Tim,
Even the whole landing gear assembly does not include the Landing gear frame
that Mike is looking for. You have the landing gear frame still attached to
you airframe as that is what you have fixed you tri gear nose leg to.
Pete Jeffers LAA inspector to the Europa Club
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Peter Timm
Sent: 07 January 2019 18:04
Subject: Re: Europa-List: Re: Mono landing gear frame
Hi Mike,
I have a whole landing gear assembly, that I bought many years ago from a
U.S. builder, who was converting to a tri-gear .
Get in touch, if you are really stuck. Shipping would probably be
expensive, as I am located North of Vancouver, B.C. Canada.
My Europa is still for sale and can be viewed on my blogsite: Peter Timm.
blogspot. ca
Regards
Peter Timm
On 2019-01-07, at 2:36 AM, MikeP wrote:
Thanks Alan
I am looking for LG01.
regards
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486790#486790
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Subject: | Re: Arplast Propeller problems |
Re Alan's comment about checking brushes etc. If it were possible to even
see the brushes you may find the answer to your problem. The motor is an
expensive sealed unit and I doubt any repair would be possible. The
armature itself is only about 1.5 mm in diameter.
Please be aware (as per this forum) that cycling this prop without the
engine running will overload and eventually wreck the pitch change motor.
Due the manufacturers of the prop now being out of business you may
experience difficulty obtaining a replacement motor. SORRY. Probably best
to enquire via this forum.
Best of luck
Pete Jeffers
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Alan Burrill
Sent: 07 January 2019 17:12
Subject: Re: Europa-List: Re: Arplast Propeller problems
My first thought would be to check the Brushes for wear, cracks, length and
broken wires.
> On 7 Jan 2019, at 16:26, BobD <rjd@bobdawson.plus.com> wrote:
>
>
> I had a problem with my PV-50 Propeller and CSC-1 Controller yesterday,
and whilst researching it on the forum, came across the posts below, which
are the nearest to the problem I experienced. My Europa has approx 60 hours
on the Prop, but the Prop was purchased many years ago (don't know the exact
date but judging from the documentation probably not long after 2000). It
has been performing as expected since installation.
>
> After take-off, and switching from TKO to CLM Mode, I noticed that the
engine RPM remained near maximum, and looking at the reading on the CSC-1,
it was displaying 40%. I tried changing to MAN mode but couldn't increase or
decrease the Pitch. I throttled back to reduce the RPM, but this impeded my
ability to climb. As it was a short flight, and I could maintain height,
albeit at a slower speed than I normally fly, I continued at low level to my
destination. Once I landed, (and at reduced RPM i.e 2500) the Pitch
Controller functioned again through the full range.
>
> 90 minutes later the Prop and Controller functioned through the full range
in my pre-flight checks, but exactly the same thing happened following climb
out, and all the way back home. I did notice a small change in the CSC-1
Pitch readout the closer I got to home, but can't recall if this was as I
throttled back in the approach. Back on terra firma, the Prop again
functioned through the full range.
>
> So it would seem the Pitch will alter at pre-flight RPM (2500-400), but
not at 5000+
>
> I didn't have time on my return to inspect the electric motor assembly,
but plan to do this in the next day or so. Apart from cleaning and
re-greasing the worm assembly, and checking again the full range of
movement, has anyone any further suggestions, or potential explanations as
to why this could happen ?
>
> --------
> Bob Dawson
> Europa XS TG || 912 ULS || G-NHRJ || Dynon Skyview || PilotAware ||
SmartAss3
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=486794#486794
>
>
>
>
>
>
>
>
>
---
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Message 4
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Subject: | Re: Arplast Propeller problems |
It is perhaps of interest that Woodcomp advise cycling their props
through fine/coarse as a pre start check, which suggests that their
structure (along with Airmaster's) is significantly more durable than
Arplast.
Regards, David Joyce, GXSDJ
On 2019-01-08 08:58, John Wighton wrote:
>
> The PV-50 and other electric VP/CS props are designed for light weight and a
relatively low hours life before overhaul/replacement. Most spam cans with CS
props use hydraulic fluid driven by a pump - this by definition does not work
at all without the engine running to provide hydraulic pressure.
>
> So, is it unreasonable for the PV-50 and Airmaster types to restrict the normal
operation to engine running only (except for maintenance and setup)? Perhaps
not.
>
> Looking at SUMMARY OF PROPELLER DESIGN PROCEDURES AND DATA. VOLUMEs 1, 2 and
3 it is evident how complex the aerodynamics, loading and consequent analysis
can be.
>
> Any propeller system should be able to withstand loads imposed for maintenance
and troubleshooting. If the design is such that accumulated detritus results
in component overload - the design is not robust and it is questionable whether
it is fully fit-for-use.
>
> I recommend following the maintenance requirements of the propeller. If, following
the work, problems still exist it may be a case of replacing suspect items.
>
> My own experience is limited to Airmaster - the earlier version which l use does
require periodic attention to the brushes (these seem to stick and sometimes
wear unevenly), prop backplate (contact quality and cleanliness) and the earlier
motor is somewhat slow (later ones being much quicker stop to stop).
>
> --------
> John Wighton
> Europa XS trigear G-IPOD
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=486817#486817 [1]
>
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