Today's Message Index:
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1. 05:56 AM - Re: What did you do with your Europa this week - 05/24 (n7188u)
2. 09:44 AM - Re: Re: What did you do with your Europa this week - 05/24 (William Daniell)
3. 11:27 AM - Re: Re: What did you do with your Europa this week - 05/24 (Pete Zut)
4. 05:28 PM - Re: What did you do with your Europa this week - 05/24 (Area-51)
Message 1
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| Subject: | Re: What did you do with your Europa this week - 05/24 |
Great download Area-51 (if I may ask, what's your name if you don't mind sharing?
Area-51 makes me feels I am talking to a secret extraterrestrial being :))
The comment about the possible reduction in noise due to the wheel fairing install
is interesting. Any experience on this out there?
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507367#507367
Message 2
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| Subject: | Re: What did you do with your Europa this week - 05/24 |
"rear wing root fairings" Like Chris I think this is interesting. Can
you expand upon this?
I am always interested in free speed.
William Daniell
LONGPORT
+1 786 878 0246
On Wed, Jun 29, 2022 at 11:15 PM Area-51 <goldsteinindustrial@gmail.com>
wrote:
> goldsteinindustrial@gmail.com>
>
> Initial tests using the digital wind tunnel show marginal streamline
> improvement with a maingear wheel fairing installed; same with the speed
> kit. the factory standard lower engine cowl on the classic generates
> around 25kg of lift from the exit chute, i haven't run tests on the xs cowl
> to compare but it would be around the same... the maingear when retracted
> sits within fairly still swirling air when retracted and so affects drag
> very little. From experience i would say the maingear cowl would reduce
> turbulence dB noise more than anything. Deleting the lower engine cowl
> chute improves forward performance with the loss of that 25kg lift and exit
> suction for engine cooling; maingear fairing works well in this scenario
> however the current shape is not optimum... Rear wing root fairings offer
> the best performance increase but only within a small AoA band with the
> flaps retracted. I have been toying with a STOL wing design which is
> proving very affective far.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=507363#507363
>
>
Message 3
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| Subject: | Re: What did you do with your Europa this week - 05/24 |
Wrt turbulence, fwiw at speeds over 140mph my classic has significant
airframe buffeting I assume is coming from the tunnel. I have yet to try
fairing it to see if it makes a difference.
Cheers,
PeteZ
On Thu., Jun. 30, 2022, 9:01 a.m. n7188u, <chmgarb@gmail.com> wrote:
>
> Great download Area-51 (if I may ask, what's your name if you don't mind
> sharing? Area-51 makes me feels I am talking to a secret extraterrestrial
> being :))
>
> The comment about the possible reduction in noise due to the wheel fairing
> install is interesting. Any experience on this out there?
>
> Chris
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=507367#507367
>
>
Message 4
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| Subject: | Re: What did you do with your Europa this week - 05/24 |
Area-51 lives in the ether and remains a privately governed top secret scientific
underground hideout... The "Obsidian Files" have not yet been sanctioned for
public release.
Feedback from flyers using the wheel fairing feel there is a difference but no
measured comparative flight test information has been gathered; at this stage
purely going off the numbers being spat out by computer analysis. Slight high
speed wing root turbulence may be experienced during a nose up attitude, mitigated
by implementing wing root farings; a larger radius between fuselage and wing
provides greater affect than a tight radius, 1/4 to mid chord back. It begins
at about 4deg AoA and runs back over the mid section fuselage to the horizontal
stabilizer root and increases in amplitude as alpha AoA increases to stall
angle.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507381#507381
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