Today's Message Index:
----------------------
1. 05:26 AM - engine limitation --- isn't it enough? (ivo welch)
2. 06:39 AM - Re: engine limitation --- isn't it enough? (Larry PERRYMAN)
3. 07:33 AM - Re: rv9a llimitations, 180hp engine (Andy Karmy)
4. 12:32 PM - Re: The 180 hp -9 (Phil Brown)
5. 12:53 PM - Stalls (Albert Gardner)
6. 10:16 PM - Re: rv9a llimitations, 180hp engine (Pitner, Timothy)
Message 1
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | engine limitation --- isn't it enough? |
--> RV9-List message posted by: ivo welch <ivo.welch@yale.edu>
hi stein bruch: (what's the first name?) actually, the alternative to
the 9a is not an aerobatic airplane. I got mine because it is easy to
fly, which makes especially IFR a lot simpler. aerobatic maneuvers are
not desired. faster cruise speed is. it is a pity that one cannot buy
a reinforced wing that allows faster speeds.
don't misunderstand me: the RV-9A is a fantastic airplane. I love
mine. I would not eventually sell my RV-9A (planned next summer),
except to get myself eventually an RV-10. but like all airplanes, the
9a has design limitations. it will be different design limitations for
different people. for me, the limit is not the aerobatic nature, but
the top speed.
hi larry: I am glad to hear that others also see IAS of around 160mph.
what is the "supercharger"?
incidentally, the variable prop is not really recommended for the 9a.
there is almost no speed/performance gain for the relatively high cost
in dollars and complexity.
we all fly airplanes that we can, through appropriate maneuvers, permit
to self-destruct. even aside from inappropriate diving, this is what
maneuvering speed is all about. so, a more-hp engine appropriately
redlined and used only in certain conditions is not a quantum leap, just
a little more of a leap. just to be clear: I am an absolute chicken
when it comes to aircraft. I have not even tried any half-way aerobatic
maneuvers with my rv-9a. I do not bank more than 60 degrees. I try to
fly as safely as possible. but, I think I would not consider putting in
a 180hp engine into a 9A to be crazy, appropriately redlined. again, I
think it would be good to have a little device that links IAS to
max-throttle. and, a 160hp is more than fine.
regards,
/iaw
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: engine limitation --- isn't it enough? |
09/04/2003 03:38:44 PM,
Serialize complete at 09/04/2003 03:38:44 PM
--> RV9-List message posted by: "Larry PERRYMAN" <larry.perryman@atofina.com>
Ivo,
My plane has an Eggenfellner Subaru and due to the wide range of engine
speeds(up to 5K) the electric adjustable prop is necessary. A fixed pitch
prop just does not cut it. Since I have no hydraulic system, only lite
weight electric props can be used.
The Eggenfellner package has an option for an Eaton Supercharger to be
added and maintain 32 inches up to 14K feet so the engine puts out rated
HP at altitude. The supercharged planes are seeing about 175 knots(RV-6
and RV-7) or so in high altitude cruse. The boost is limited so the engine
is not pushed to produce above rated HP but will maintain rated HP. There
should be several more customer built planes flying with this option later
this year and more data should be available then. Right now there are
3-9's, 2-7's, and 1-6 flying with the engine and prop combos but there are
about 10 more coming on later this year.
If you want to check it out more, look at www.eggenfellneraircraft.com for
more info.
Regards,
Larry Perryman
Voice Supervisor
ATOFINA Petrochemicals Inc.
(281) 227-5550
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | rv9a llimitations, 180hp engine |
--> RV9-List message posted by: "Andy Karmy" <andy@karmy.com>
Paint just slows me down... So no it's not painted yet...
and Yes I am based out of Thun field in Puyallup.
- Andy
---------- Original Message ----------------------------------
From: "Pitner, Timothy" <TPitner@flowcorp.com>
>--> RV9-List message posted by: "Pitner, Timothy" <TPitner@flowcorp.com>
>
>Andy, is your rv9 painted yet? And do you fly out of Thund?
>
>Tim
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: The 180 hp -9 |
--> RV9-List message posted by: "Phil Brown" <philipbrown@onetel.net.uk>
thanks for the info........while I'm at it ,in the U.K. a stall warning
device has been made mandatory to all vans aircraft due to there being
hardly any pre stall buffet warning.......surely the 9 has a different
airfoil section and should behave differently to the other marks(as there is
not yet any 9,s flying over here the powers that be lump all RVs into the
same basket) how much buffet do YOU get in your 9?
----- Original Message -----
From: <DThomas773@aol.com>
Subject: Re: RV9-List: The 180 hp -9
> --> RV9-List message posted by: DThomas773@aol.com
>
> The RV-9 spars are roughly the same size in their external dimension(
width,
> length etc.), but the heavy aluminum bars riveted to the web, top and
bottom,
> are about 1/3 smaller. They are as heavy as they need to be to accomplish
the
> goals and mission of the airplane. They are not designed for an areobatic
> airplane or for an airplane with an engine greater than 180 HP.
>
> Dennis Thomas
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> RV9-List message posted by: "Albert Gardner" <spudnut@worldnet.att.net>
I find there is warning with only a little buffet but the recovery is rapid
with little altitude loss in straight ahead stalls. Accelerated stalls at
low speed and gross weight but be a different matter.
Albert Gardner
RV-9A 872RV
Yuma, AZ
----- Original Message -----
From: "Phil Brown" <philipbrown@onetel.net.uk>
Subject: Re: RV9-List: The 180 hp -9
> --> RV9-List message posted by: "Phil Brown" <philipbrown@onetel.net.uk>
>
> thanks for the info........while I'm at it ,in the U.K. a stall warning
> device has been made mandatory to all vans aircraft due to there being
> hardly any pre stall buffet warning.......surely the 9 has a different
> airfoil section and should behave differently to the other marks(as there
is
> not yet any 9,s flying over here the powers that be lump all RVs into the
> same basket) how much buffet do YOU get in your 9?
> ----- Original Message -----
> From: <DThomas773@aol.com>
> To: <rv9-list@matronics.com>
> Subject: Re: RV9-List: The 180 hp -9
>
>
> > --> RV9-List message posted by: DThomas773@aol.com
> >
> > The RV-9 spars are roughly the same size in their external dimension(
> width,
> > length etc.), but the heavy aluminum bars riveted to the web, top and
> bottom,
> > are about 1/3 smaller. They are as heavy as they need to be to
accomplish
> the
> > goals and mission of the airplane. They are not designed for an
areobatic
> > airplane or for an airplane with an engine greater than 180 HP.
> >
> > Dennis Thomas
> >
> >
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | rv9a llimitations, 180hp engine |
--> RV9-List message posted by: "Pitner, Timothy" <TPitner@flowcorp.com>
It was just a guess... you flew over my house this weekend... I was
cultivating my rocks for my new backyard (Spanaway spuds) and called my wife
out to show her what we would be doing several years from now. I'm just off
160th.
Tim
-----Original Message-----
From: Andy Karmy [mailto:andy@karmy.com]
Subject: RE: RV9-List: rv9a llimitations, 180hp engine
--> RV9-List message posted by: "Andy Karmy" <andy@karmy.com>
Paint just slows me down... So no it's not painted yet...
and Yes I am based out of Thun field in Puyallup.
- Andy
---------- Original Message ----------------------------------
From: "Pitner, Timothy" <TPitner@flowcorp.com>
>--> RV9-List message posted by: "Pitner, Timothy" <TPitner@flowcorp.com>
>
>Andy, is your rv9 painted yet? And do you fly out of Thund?
>
>Tim
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|