Nigel,
Holy Cow! That's gorgeous! If it works as well as it looks it should be worth
25 Kts.
Keep us posted as work progresses and it flies. And take good care of those
molds
as you may have to spend all your spare time making copies for the rest of
us.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Jun 12, 2012, at 7:02 AM, nigel_graham@m-tecque.co.uk wrote:
Bud,
A fascinating article - thanks. It would seem that I have spent the last God
knows
how many years researching the same data as you (mostly 1940's and 50's NACA
papers) and come up with much the same conclusions regarding cooling and cooling
drag reduction. By a curious coincidence, I have been busy this weekend
buried in my workshop - laminating. Compare the results, hot-out-of-the-mould,
with the computer generated cowl design on page 16 of your report. My design
concepts would all appear to have come out of your "Lets's get radical" section!
Keep up the good work.
Nigel
On 10/06/2012 05:21, Bud Yerly wrote:
>
> Ken and Graham,
> I've attached my modifications and techniques briefing used for Europa Cooling
with the XS cowl which written up in the Europa Flyer .
> If I do say so myself, I never have cooling issues in Florida at 95 degree
> summer
days using 50/50 Anitifreeze. Judging by the calls and email success stories,
these simple techniques work pretty much world wide.
>
> References for further study are at the end of the document.
>
> Those who have followed these techniques with a stock cowl have no problems
> cooling
especially with the trigear. In fact it gets a bit too cool in cooler
climates and this is with no modifications to the existing cowl, only treating
the airflow around the coolers.
> I have worked these issues over the last six years and we just finished three
more aircraft at the shop, all Rotax and we reworked a clients Jab 3300, and
all the Rotax's have no cooling issues and the Jab is tolerable except taxi
times
must be short, 10 or 15 minutes max or it gets a bit too hot for a takeoff
on a summer day.
>
> I'll do another briefing/article on the Jabiru before long.
>
> Call or email me at the office in Florida below if you have need of more
> specifics
or are having problems getting the references on line.
>
> Regards,
> Bud Yerly
> Europa Tech Support
> US Europa Dealer
> Custom Flight Creations, Inc.
> www.customflightcreations.com
> (813) 653-4989
>
<120610 - Cowl.pdf>
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