Question: Velocity/Cozy and high altitude

[Shin Gou]

Can Velocity or Cozy fly at/above 25,000 feet with Superior
supercharged 360 engine? A friend of mine is considering to fly a
Velocity or Cozy for long and high trips and would like to know their
capacity for this kind of mission. I personally haven't heard any
Velocity or Cozy flys at this altitude regularly. But my friend wants
to give a try. Any thoughts, especially some caculation to prove?

Thanks a lot.

Shin

[George A. Graham]

On 7 Feb 2005, Shin Gou wrote:

> Can Velocity or Cozy fly at/above 25,000 feet with Superior
> supercharged 360 engine?


I am very certain that it will work well. I have flown my EZ up
to 18,000 ft, and stopped there because I am VFR only. The airplane
was willing to keep climbing, and I do not have a turbo/supercharger.

There are safety issues, with oxygen masks etc.

Jim Price flew his Long-EZ to over 34,000 ft for a record, again
no supercharger.



George Graham
RX-7 Powered Graham-EZ, N4449E
Homepage <http://bfn.org/~ca266>

[Marc J. Zeitlin]

Shin Gou asks:

> Can Velocity or Cozy fly at/above 25,000 feet with Superior
> supercharged 360 engine? A friend of mine is considering to fly a
> Velocity or Cozy for long and high trips and would like to know their
> capacity for this kind of mission.

There are numerous Long-Eze's that regularly fly in the low 20's, and
that's with a normally aspirated engine - no turbo-charger or
supercharger. At gross weight, the service ceiling of a COZY will be
around 17K ft - 18K ft with a standard O-360, no turbo/supercharger.
Lighter, say at 1800 lbs, it will be more like 22K ft or so. It
wouldn't surprise me if I could get my COZY to 25K ft if I was solo with
only 20 gallons of gas, and it would only take about 1/2 hour to get up
there (once I get my IR, of course).

Now add a turbo/surpercharger, and 25K ft. for a COZY is easy.
Remember, a NORMALLY aspirated Long-Eze has been up to 35,027 ft. I
know of one builder installing a turbocharged Continental O-360 in his
COZY in order to fly at 25K ft, but he won't be finished for a few
years.

The COZY airframe is more than capable, but remember that up that high,
there's not a lot of time to recover if your O2 system dies - you better
come down FAST.

As far as a Velocity goes, probably not a large difference, but you'll
need a larger engine than for the COZY's, as all Velocities do for
equivalent performance. It would be a bit more comfortable, though :-).

--
Marc J. Zeitlin
http://marc.zeitlin.home.comcast.net/
http://www.cozybuilders.org/
Copyright (c) 2005

[Dave S]

No reason why not.. BUT.. dress warmly and take some oxygen.. and the
plane and pilot will need to be legal for IFR flight.

I ran some prelim numbers and I expect the Velocity my friend and I are
building to be capable of nearly 200 hp in the flight levels (turbo'd
modified Mazda rotary engine)

Dave

Shin Gou wrote:

> Can Velocity or Cozy fly at/above 25,000 feet with Superior
> supercharged 360 engine? A friend of mine is considering to fly a
> Velocity or Cozy for long and high trips and would like to know their
> capacity for this kind of mission. I personally haven't heard any
> Velocity or Cozy flys at this altitude regularly. But my friend wants
> to give a try. Any thoughts, especially some caculation to prove?
>
> Thanks a lot.
>
> Shin
>

[Roger]

On Mon, 7 Feb 2005 14:38:37 -0500, "George A. Graham" >
wrote:

>On 7 Feb 2005, Shin Gou wrote:
>
>> Can Velocity or Cozy fly at/above 25,000 feet with Superior
>> supercharged 360 engine?

Can we go that high now that they are using reduced vertical
separation. I'd think it'd require some extra equipment and training
to make the FAA happy.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
>
>
>I am very certain that it will work well. I have flown my EZ up
>to 18,000 ft, and stopped there because I am VFR only. The airplane
>was willing to keep climbing, and I do not have a turbo/supercharger.
>
>There are safety issues, with oxygen masks etc.
>
>Jim Price flew his Long-EZ to over 34,000 ft for a record, again
>no supercharger.
>
>
>
>George Graham
>RX-7 Powered Graham-EZ, N4449E
>Homepage <http://bfn.org/~ca266>

[Dave S]

THe following is copied and pasted from a rec.aviation.IFR post a day or
two ago regarding just the answer you are looking for:



a.. The RVSM program enables vertical separation to be reduced between FL
290-410 (inclusive) from 2,000 ft. to 1,000 ft. RVSM was first implemented
in North Atlantic Airspace in 1997. It is now implemented in other major
airspaces such as Europe, the Pacific Ocean and Australia.



So... You can get up to FL 280 without special equipment, certification
and training.

Dave



Roger wrote:
> On Mon, 7 Feb 2005 14:38:37 -0500, "George A. Graham" >
> wrote:
>
>
>>On 7 Feb 2005, Shin Gou wrote:
>>
>>
>>>Can Velocity or Cozy fly at/above 25,000 feet with Superior
>>>supercharged 360 engine?
>
>
> Can we go that high now that they are using reduced vertical
> separation. I'd think it'd require some extra equipment and training
> to make the FAA happy.
>
> Roger Halstead (K8RI & ARRL life member)
> (N833R, S# CD-2 Worlds oldest Debonair)
> www.rogerhalstead.com
>
>>
>>I am very certain that it will work well. I have flown my EZ up
>>to 18,000 ft, and stopped there because I am VFR only. The airplane
>>was willing to keep climbing, and I do not have a turbo/supercharger.
>>
>>There are safety issues, with oxygen masks etc.
>>
>>Jim Price flew his Long-EZ to over 34,000 ft for a record, again
>>no supercharger.
>>
>>
>>
>>George Graham
>>RX-7 Powered Graham-EZ, N4449E
>>Homepage <http://bfn.org/~ca266>
>
>

[Capt.Doug]

>"Dave S" wrote in message > So... You can get up to FL 280 without special
>equipment, certification and training.

ATC can clear a corridor for you, traffic permitting, so you climb to FL430.
Or you could declare yourself a lifeguard flight.

D. :-)