I  hitched a ride with Dave in his RX7 turbo II  rotary powered  RV6.

Here we are at 12,600  feet over the Sierra pass at 162 Kts  or 183
MPH  true airspeed.

Just cruising at only 5480   RPM. Rather quiet and very smooth with
head sets  on. This is the same  airplane that went 229 MPH
around the pylons at Reno a couple of days  ago.

8 gallons an hour or 23 MPG.

The cowl flaps closed gave 3  or 4 Kts
at the  expense of 5 or 6 degrees C higher oil  temp.

From about 69 C to 74 C. Excellent trade off.

Don't know  on the water temp change as that was not  working
properly.

We  stopped over  night at Mammoth. Dave dropped me off in front
of my  hangar door at SZP. Thanks for the ride Dave.

Paul  Lamar

Dave,

What RPM were you running at the 229MPH speed? What  is the  ratio
of the  borrowed PSRU? It looks like you may  need  a complete new
gear box. If so  are  you  thinking  of running the 2.85 unit?

Dale  Davies

Hi  Dale,
I was seeing max RPM of  about 7000 to 7300 depending on g-load  and
location
on the course, and up to 7500 briefly coming down the  "chute."   That
still puts my tips in the low 900 fps range which  is  about right for
racing.  I still have the 1B gear   box.  Cant change because I built-
in an engine   off-set.

--
David Leonard

Turbo Rotary RV-6  N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

Hi  Dave,

I  was just curious. That darn thinking thing again. You've  heard  the
song?
Any way, a p-port Renesis with turbo  would  add a bunch of power.
Especially if
you  could run the engine a  little faster.

Dale  Davies


We have a problem before we  can do that. Dave  has about 250 HP when
he is
running about 45  inches  of Hg. With a p-port my guess that would go
to about 300  HP.  Dave has done nothing on drag reduction so far.
I can get  to  300 HP NA if I go up to a 3.17:1 and turn 8000 to 9000
RPM   with a p-port. The red line on the RX8 engine is 9000 RPM.

Both Dave, I  and others. RV tail flutter. We agree on this. To go  faster
than 230  MPH we need to fix the tail  first.

We spoke to an expert on this  RV4 RV6 problem at  Reno.

Consequently I am in the process of  redesigning the  vertical and rudder
in carbon fiber to make it  stronger and  stiffer without adding any
weight.
I spoke to   the people in Oxnard today that built the Kis and a
lot of  other  aircraft like early Lancairs. They have an oven and vac   bag
facilities. They agreed to do it. For some strange reason  you do  not
hear
about flutter on composite  airplanes. At least I have no  heard about it.

I also  consulted with my carbon fiber expert Alex  Kozlof this  morning.
Alex and his son won the Little America cup race  in a  carbon cat Alex
designed.
Alex is also a  distributor of  uni carbon and a pilot. More on this
later.

Paul  Lamar


Paul,
That picture of the mountains  you show is that  the pass
ahead? if so I would not like to be flying  there with a bit  of low
cloud, and was that at 12,000ft.?
lucky duck to get to fly  there:-P
John Burey.

Yosemite pass is a bit  north of where we  went through. That is the
picture with
the clouds and big rock called El  Capitan.
http://www.nature.nps.gov/air/WebCams/parks/yosecam/yoselargerimage.cfm


We  went through Mammoth mountain pass at 12,500 feet and stayed  there
as  there is another 10,000 foot  mountain range North of  SZP. Here is  a
google
map.  Besides that you go faster with a  turbo and  get better MPG.
BTW the turbo also climbs very well at  12,500  feet.

Paul Lamar

Hi   Paul,
As you would know here  in OZ. @ 12,500ft you are
already 5,500  ft ABOVE everything with  rocks in it here. It's on my
bucket list to get to  the Rockies. We  have these here.
John Burey

-

Paul

Do you realize that  it was at Mammoth that Steve Fossett crashed. He ran
out of lift in a  gulley.

Peter

He was not flying a turbo charged rotary  :)

Paul Lamar

If he had only known.
Peter


He should have armed himself :)

Paul Lamar