Today's Message Index:
----------------------
1. 12:46 AM - Re: Re: Woodcomp or Airmaster Prop (Frans Veldman)
2. 01:25 AM - Re: Re: Woodcomp or Airmaster Prop (nigel_graham@m-tecque.co.uk)
3. 05:43 AM - Re: Re: Woodcomp or Airmaster Prop (GRAHAM SINGLETON)
4. 06:10 AM - Re: Re: Woodcomp or Airmaster Prop (Paul McAllister)
5. 07:36 AM - Re: Re: Woodcomp or Airmaster Prop (Frans Veldman)
6. 10:11 PM - where to locate fuel pressure sensor (Rowland Carson)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Woodcomp or Airmaster Prop |
On 06/11/2013 11:12 AM, GRAHAM SINGLETON wrote:
> It would be worth researching exhaust extraction. I have it on my
> Lycoming (pusher Long EZ) and it works
> Warm day, full throttle on the ground for 10 minutes, throttle back and
> it cools down from near red line..
I implemented exhaust extraction also in my Europa. No venturi, just the
exhaust tube shorter than the tunnel it is fed through. I could however
never establish that it is really working as designed. Fact is that I'm
unable to overheat the engine on the ground, but that can also be the
result of the completely different low drag cooling arrangement. Or the
Woodcomp propeller of course.
Frans
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Woodcomp or Airmaster Prop |
It has been pointed out to me by a good but irritatingly pedantic
friend, with time to spare and use of a computer (he'll be at work then)
that the Imperial number I quoted was missing a digit.
For those of you about to rush off this morning and fork out an obscene
amount of money for a new prop, without having first checked the
numbers, please be advised that the correct Moment Of Inertia should
have read *142,328 lb ft2*
**
With humility
Nigel ;-)
On 11/06/2013 17:41, Sir Peregrine Hardly-Worthit wrote:
>
> Not being picky, but that might be 142,328 lb ft^2 J
>
> http://www.translatorscafe.com/cafe/EN/units-converter/moment-of-inertia/1-9/
>
> Sir Peregrine Hardly-Worthit
>
> Vice-Chairman, Pedantic Society
>
> *From:*owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] *On Behalf Of
> *nigel_graham@m-tecque.co.uk
> *Sent:* 11 June 2013 16:42
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: Re: Woodcomp or Airmaster Prop
>
> Hi Jerry,
>
> You've stimulated an interesting thread and received some high quality
> feedback.
>
> My only contribution is to advise you to look carefully at the Maximum
> moment of inertia of the combined prop and VP unit if you are
> seriously considering fitting a larger diameter Prop.
>
> Rotax advise a maximum of 6000 Kg cm2 (14,328 lb ft2 in old money).
>
> You might wish to discuss this with Martin before making a final decision.
>
> Atb
>
> Nigel
>
> On 11/06/2013 15:58, N6ZY wrote:
>
> Snip .......
>
>
>
>
>
> The other question we discussed was the prop diameter. I will fly 98% of
the time off hard runways, and cannot see that a 68" diameter prop would be impractical
even allowing for flat nosewheel tires (tyres? ..................
>
>
>
> Jerry
>
>
>
>
>
>
>
>
>
> * *
> * *
> * *
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Woodcomp or Airmaster Prop |
Frans=0Athis is the USA Long EZ that was my mentor. He is based in Florida
and has no cooling problems.Note the small cooling air inlets.=0AThe third
inlet is the engine breathing to the fuel injector servo.=0AGraham=0A=0A=0A
=0A________________________________=0A From: Frans Veldman <frans@privatepi
lots.nl>=0ATo: europa-list@matronics.com =0ASent: Wednesday, 12 June 2013,
8:45=0ASubject: Re: Europa-List: Re: Woodcomp or Airmaster Prop=0A =0A=0A--
=0AOn 06/11/2013 11:12 AM, GRAHAM SINGLETON wrote:=0A> It would be worth re
searching exhaust extraction. I have it on my=0A> Lycoming (pusher Long EZ)
and it works=0A> Warm day, full throttle on the ground for 10 minutes, thr
ottle back and=0A> it cools down from near red line..=0A=0AI implemented ex
haust extraction also in my Europa. No venturi, just the=0Aexhaust tube sho
rter than the tunnel it is fed through. I could however=0Anever establish t
hat it is really working as designed. Fact is that I'm=0Aunable to overheat
the engine on the ground, but that can also be the=0Aresult of the complet
ely different low drag cooling arrangement. Or the=0AWoodcomp propeller of
=
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Woodcomp or Airmaster Prop |
Jerry,
Martin is working on new ferrules for the new carbon fiber blades.
Jack Norris was the designer for the blades for the hydraulic constant
speed outfit and when I asked him about them he told me that they were
optimized for faster aircraft like the Europa.
Paul
On Tue, Jun 11, 2013 at 2:05 PM, Jeremy Fisher <jffisher@gmail.com> wrote:
> Thanks. However the Whirlwind story is confusing. Effectively there are
> now two Whirlwind companies, the original for fixed pitch props and a
> spin-off for constant speed. I think that Martin at Airmaster was
> referring to the blades from the hydraulic constant speed outfit. The
> fixed pitch company also has new carbon fiber blades, but I think that they
> are 70", which is a bit much. I will follow up. And yes Nigel, thanks,
> you are right, I do need to check the inertia data.
>
> This has turned out to be a much more complex question than I originally
> understood, but it does make quite a difference in aircraft performance and
> reliability.
>
> Jerry
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Woodcomp or Airmaster Prop |
On 06/12/2013 02:42 PM, GRAHAM SINGLETON wrote:
> Frans
> this is the USA Long EZ that was my mentor. He is based in Florida and
> has no cooling problems.Note the small cooling air inlets.
Thanks for the picture! This looks quite like my own setup. I guess it
must be working then.
Frans
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | where to locate fuel pressure sensor |
I've not yet started the firewall-forward work, but am planning the fuel system
of my 912S installation as a whole while working on the fuselage parts of it.
I'm intending to install a UMA fuel pressure sensor, and for it to be most useful,
it seems good to have it as close to the carburettors as possible.
The manual shows the fuel line coming from the mechanical pump first to the starboard
carb, then the port carb and finally exiting via the restrictor to the
return line, so the choices for positioning a pressure sensor takeoff tee are
(a) between pump & stbd carb, (b) between the 2 carbs, and (c) between the port
carb and the restrictor.
I notice in the current Kitplanes a picture of several engine-bay sensors mounted
on the firewall and the caption says:
"Sensors for (left to right) oil pressure, manifold pressure, and fuel pressure
should be mounted remotely on the firewall."
Presumably this recommendation is to isolate them from engine vibration & heat.
However, without adding a long extra piece of piping, the only one of the 3 choices
above that allows a firewall mount is (c) - between the port carb and the
restrictor.
Does anyone see a problem with this proposed arrangement?
If I'm barking up the wrong tree, where have others mounted fuel pressure sensors?
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
| pictures: http://picasaweb.google.com/rowlandcarson
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|