Today's Message Index:
----------------------
1. 12:39 AM - Re: Motorglider Wings? (John Wighton)
2. 01:12 AM - Re: Re: Motorglider Wings? (Richard Churchill-Coleman)
3. 01:24 AM - Europa Club AGM and dinner (davidjoyce@doctors.org.uk)
4. 02:30 AM - Re: Re: Motorglider Wings? (Pete)
5. 12:59 PM - CORRECTION Europa Club AGM and dinner (davidjoyce@doctors.org.uk)
6. 04:19 PM - Re: Texel fly-in 23rd-25th August - save the date! (carlp101)
7. 04:25 PM - Re: IMC Night application - Propeller (carlp101)
Message 1
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| Subject: | Re: Motorglider Wings? |
Quote:
Here in Canada we can declare whatever gross weight we want (wisely or
not). Seeing that the added weight is itself in the wing and results in no
increased stresses, I figure I could simply increase the gross with long
wings by the same 100lbs without penalty (assuming enough HP). No?
It is true that inertia relief can be credited to mitigate loads and this gives
a proportional benefit with heavy wings. But to assume the stresses do not change
is incorrect. The MG wings generate more lift, hence the bending moments
and shear forces on the root will be higher.
I believe the spar depth was changed to increase 2nd Mt of area. The goal therefore
may have been to match the standard a/c stresses. I have some of Jason Russell's
work on file from many years ago, it is probably worth taking a look at
that and any other design data (at LAA?) to see what the margins are.
I suspect that the long delay in gaining approval for the MG version stems from
a reduction in structural margins. Perhaps someone can tell the story????
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489233#489233
Message 2
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| Subject: | Re: Motorglider Wings? |
John
I wont speculate on the reasons for delay in certification as I am too aware of
the law of libel. However, my understanding of the main issue with increasing
the MTOW is demonstrating the landing gear is capable of withstanding the additional
loads, potentially with prop clearance issues on the mono in addition.
RIchard
Sent from my iPhone
> On 15 May 2019, at 08:39, John Wighton <john@wighton.net> wrote:
>
>
> Quote:
>
> Here in Canada we can declare whatever gross weight we want (wisely or
> not). Seeing that the added weight is itself in the wing and results in no
> increased stresses, I figure I could simply increase the gross with long
> wings by the same 100lbs without penalty (assuming enough HP). No?
>
> It is true that inertia relief can be credited to mitigate loads and this gives
a proportional benefit with heavy wings. But to assume the stresses do not
change is incorrect. The MG wings generate more lift, hence the bending moments
and shear forces on the root will be higher.
>
> I believe the spar depth was changed to increase 2nd Mt of area. The goal therefore
may have been to match the standard a/c stresses. I have some of Jason
Russell's work on file from many years ago, it is probably worth taking a look
at that and any other design data (at LAA?) to see what the margins are.
>
> I suspect that the long delay in gaining approval for the MG version stems from
a reduction in structural margins. Perhaps someone can tell the story????
>
> --------
> John Wighton
> Europa XS trigear G-IPOD
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=489233#489233
>
>
>
>
>
>
>
>
>
Message 3
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| Subject: | Europa Club AGM and dinner |
The Europa Club fly in, AGM, talk by Andy Draper and Dinner will be held
at Wellesbourn Mountford, EGBW and the nearby Charlecote Pheasant Hotel
on Friday July 26th 2019. Details are attached and on the club website
(www.theeuropaclub.org [1] ). We will hope to see you there. David
Joyce, GXSDJ
Links:
------
[1] http://www.theeuropaclub.org
Message 4
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| Subject: | Re: Motorglider Wings? |
Yes, i forgot to mention gentle landings would be required as that would be the
weak link from my understanding.
I still however do not understand the increased spar bending moment due to increased
wing mass. Il. Have to start googling :)
Cheers,
Pete
> On May 15, 2019, at 4:11 AM, Richard Churchill-Coleman <richard.churchill-coleman@sky.com>
wrote:
>
>
> John
>
> I wont speculate on the reasons for delay in certification as I am too aware
of the law of libel. However, my understanding of the main issue with increasing
the MTOW is demonstrating the landing gear is capable of withstanding the additional
loads, potentially with prop clearance issues on the mono in addition.
>
> RIchard
>
> Sent from my iPhone
>
>> On 15 May 2019, at 08:39, John Wighton <john@wighton.net> wrote:
>>
>>
>> Quote:
>>
>> Here in Canada we can declare whatever gross weight we want (wisely or
>> not). Seeing that the added weight is itself in the wing and results in no
>> increased stresses, I figure I could simply increase the gross with long
>> wings by the same 100lbs without penalty (assuming enough HP). No?
>>
>> It is true that inertia relief can be credited to mitigate loads and this gives
a proportional benefit with heavy wings. But to assume the stresses do not
change is incorrect. The MG wings generate more lift, hence the bending moments
and shear forces on the root will be higher.
>>
>> I believe the spar depth was changed to increase 2nd Mt of area. The goal therefore
may have been to match the standard a/c stresses. I have some of Jason
Russell's work on file from many years ago, it is probably worth taking a look
at that and any other design data (at LAA?) to see what the margins are.
>>
>> I suspect that the long delay in gaining approval for the MG version stems from
a reduction in structural margins. Perhaps someone can tell the story????
>>
>> --------
>> John Wighton
>> Europa XS trigear G-IPOD
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=489233#489233
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 5
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| Subject: | CORRECTION Europa Club AGM and dinner |
Dear all, PLEASE NOTE: The email address for sending in your booking in
the attachment is INCORRECT. The correct email is:
Trips@theeuropaclub.org
-------- Original Message --------
SUBJECT:
Europa-List: Europa Club AGM and dinner
DATE:
2019-05-15 09:24
FROM:
davidjoyce@doctors.org.uk
TO:
europa list <europa-list@matronics.com>
REPLY-TO:
europa-list@matronics.com
The Europa Club fly in, AGM, talk by Andy Draper and Dinner will be held
at Wellesbourn Mountford, EGBW and the nearby Charlecote Pheasant Hotel
on Friday July 26th 2019. Details are attached and on the club website
(www.theeuropaclub.org [1] ). We will hope to see you there. David
Joyce, GXSDJ
Links:
------
[1] http://www.theeuropaclub.org
Message 6
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| Subject: | Re: Texel fly-in 23rd-25th August - save the date! |
I've got a pass for the event, so I'll be flying out on the Friday.
See you there.
ATB
Carl
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489242#489242
Message 7
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| Subject: | Re: IMC Night application - Propeller |
Paperwork submitted. Keep your fingers crossed. VFR limitation removal imminent
(I hope). Looking forward to night & IMC!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489243#489243
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