Today's Message Index:
----------------------
1. 12:35 PM - Re: Re: RV-8 with O-540 in this months EAA Sport Aviation (Boyd C. Braem)
2. 01:22 PM - Re: Re: RV-8 with O-540 in this months EAA Sport Aviation (C. Rabaut)
3. 01:36 PM - Re: Re: RV-8 with O-540 in this months EAA Sport Aviation (Bob Japundza)
4. 03:39 PM - Re: Re: RV-8 with O-540 in this months EAA Sport Aviation (Ron C)
5. 07:28 PM - Re: Re: RV-8 with O-540 in this months EAA Sport Aviation (Russ Werner)
Message 1
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: RV-8 with O-540 in this months EAA Sport Aviation |
--> Rocket-List message posted by: "Boyd C. Braem" <bcbraem@comcast.net>
Bob--
What's this "overloading the wings" stuff? They're still built to
+6/-3g, aren't they? Are these guys "who did their homework" saying
that because of a little extra engine and battery weight that their
wings are more likely to depart the airframe in a "normal flight"
envelope? Something is not right with this picture. What is the empty
weight of these airplanes? And, (reaching under the desk for my
soapbox) why go to all the trouble with a Super-8 mod and not go with an
IO-540 (esp. up there in the Midwest where icing is much more prevalent
than down here in SW Florida)? And, mmmnph, mmnnnppphhh....Oh, thanks,
honey--I was starting to drool, there, wasn't I?
Boyd
RV-Super 6/325 LyCon hp
design gross weight 1900#--flight tested to 2000#--guess what my design
aerobatic weight is?
wings chopped 7" ala Harmon Rocket--lotsa good advice out there in
Bakersfield for anyone wanting to put a -540 in any RV.
Bob Japundza wrote:
>--> Rocket-List message posted by: Bob Japundza <bjapundza@yahoo.com>
>
>The super-8 in SA is owned by a friend of mine. There are four super-8's flying
here in Indy, and those guys did their homework. They have to be very careful
flying them in normal flight out of fear of overloading the wings. They use
a larger 35ah battery mounted mid-way in the tailcone. They are about 10mph
slower than a Rocket at cruise. Regards, Bob
>
>P M Condon <pcondon@mitre.org> wrote:--> Rocket-List message posted by: P M Condon
>
>
>There is a picture in the "what our members are building" section of the
>latest EAA sport Aviation mag of a RV-8 with a O-540. A few folks over
>the years have done this with 8's & sixes. Has anyone done the W&B and
>other studies to see the extent of such a undertaking??
>
>
>
>
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: RV-8 with O-540 in this months EAA Sport Aviation |
--> Rocket-List message posted by: "C. Rabaut" <crabaut@coalinga.com>
Boyd,
Okay... I'll bite, what's your Super 6's aerobatic gross weight limit?
BTW, I think the reference about ripping off the wings was the cruise speed
being so high. Although I'm not sure, because the way I understand it
anything above 130 mph and your stick theoretically has all the "G's" at its
disposal to become "The Wing Removal Lever". And even my lowly RV-4
(IO-320) has that capability, at far less than max cruise.
Chuck
do not archive
----- Original Message -----
From: Boyd C. Braem <bcbraem@comcast.net>
Subject: Re: Rocket-List: Re: RV-8 with O-540 in this months EAA Sport
Aviation
> --> Rocket-List message posted by: "Boyd C. Braem" <bcbraem@comcast.net>
>
> Bob--
>
> What's this "overloading the wings" stuff? They're still built to
> +6/-3g, aren't they? Are these guys "who did their homework" saying
> that because of a little extra engine and battery weight that their
> wings are more likely to depart the airframe in a "normal flight"
> envelope? Something is not right with this picture. What is the empty
> weight of these airplanes? And, (reaching under the desk for my
> soapbox) why go to all the trouble with a Super-8 mod and not go with an
> IO-540 (esp. up there in the Midwest where icing is much more prevalent
> than down here in SW Florida)? And, mmmnph, mmnnnppphhh....Oh, thanks,
> honey--I was starting to drool, there, wasn't I?
>
> Boyd
> RV-Super 6/325 LyCon hp
> design gross weight 1900#--flight tested to 2000#--guess what my design
> aerobatic weight is?
> wings chopped 7" ala Harmon Rocket--lotsa good advice out there in
> Bakersfield for anyone wanting to put a -540 in any RV.
>
> Bob Japundza wrote:
>
> >--> Rocket-List message posted by: Bob Japundza <bjapundza@yahoo.com>
> >
> >The super-8 in SA is owned by a friend of mine. There are four super-8's
flying here in Indy, and those guys did their homework. They have to be
very careful flying them in normal flight out of fear of overloading the
wings. They use a larger 35ah battery mounted mid-way in the tailcone.
They are about 10mph slower than a Rocket at cruise. Regards, Bob
> >
> >P M Condon <pcondon@mitre.org> wrote:--> Rocket-List message posted by: P
M Condon
> >
> >
> >There is a picture in the "what our members are building" section of the
> >latest EAA sport Aviation mag of a RV-8 with a O-540. A few folks over
> >the years have done this with 8's & sixes. Has anyone done the W&B and
> >other studies to see the extent of such a undertaking??
> >
> >
> >
> >
>
>
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: | Re: RV-8 with O-540 in this months EAA Sport Aviation |
--> Rocket-List message posted by: Bob Japundza <bjapundza@yahoo.com>
Boyd, the wings on the Super-8's aren't chopped down like the Rockets or your airplane.
Couple that with a significantly higher empty weight and higher cruise
speeds, a wing that's already longer than a RV-4 wing, it is possible to overstress
the wings when going thru turbulence since they are cruising right on
the RV-8's designed red-line, when operating at 75%. These guys usually loaf
around under 50% power at typical RV speeds/fuel burns so life is smooth and
quiet. Unlike the Rockets with the heavier skins up front and other structure
mods, these are stock airframes, so there is some merit to their thinking--just
being careful. I don't know off hand what their empty weights were. Three
of them are carbureted, and that was just out of personal preference, ease of
maintenance, starting, etc. The reason for using a 540 is there's more bang for
the buck there. Regards, Bob
"Boyd C. Braem" <bcbraem@comcast.net> wrote:--> Rocket-List message posted by:
"Boyd C. Braem"
Bob--
What's this "overloading the wings" stuff? They're still built to
+6/-3g, aren't they? Are these guys "who did their homework" saying
that because of a little extra engine and battery weight that their
wings are more likely to depart the airframe in a "normal flight"
envelope? Something is not right with this picture. What is the empty
weight of these airplanes? And, (reaching under the desk for my
soapbox) why go to all the trouble with a Super-8 mod and not go with an
IO-540 (esp. up there in the Midwest where icing is much more prevalent
than down here in SW Florida)? And, mmmnph, mmnnnppphhh....Oh, thanks,
honey--I was starting to drool, there, wasn't I?
Boyd
RV-Super 6/325 LyCon hp
design gross weight 1900#--flight tested to 2000#--guess what my design
aerobatic weight is?
wings chopped 7" ala Harmon Rocket--lotsa good advice out there in
Bakersfield for anyone wanting to put a -540 in any RV.
Bob Japundza wrote:
>--> Rocket-List message posted by: Bob Japundza
>
>The super-8 in SA is owned by a friend of mine. There are four super-8's flying
here in Indy, and those guys did their homework. They have to be very careful
flying them in normal flight out of fear of overloading the wings. They use
a larger 35ah battery mounted mid-way in the tailcone. They are about 10mph slower
than a Rocket at cruise. Regards, Bob
>
>P M Condon
wrote:--> Rocket-List message posted by: P M Condon
>
>
>There is a picture in the "what our members are building" section of the
>latest EAA sport Aviation mag of a RV-8 with a O-540. A few folks over
>the years have done this with 8's & sixes. Has anyone done the W&B and
>other studies to see the extent of such a undertaking??
>
>
>
>
---------------------------------
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: RV-8 with O-540 in this months EAA Sport Aviation |
--> Rocket-List message posted by: "Ron C" <ronc@metropolisdesign.com>
Whoa!!! Boyd!
Chill out dude don't blow a base gasket. Remember " " "EXPERIMENTAL" "
" , get it?
Hey, by the way, I noticed you list your Ly-Con 540 at 325 hp. Would you
mind listing whats been done to that bad boy and at what settings your
getting that much power? I have a balanced 540 with 10 to ones and have
been wondering how much it actually puts out- it has not been dynoed. At
full blow im doing 250 at 5,500 msl
Thanks
Ron Carter
HRII #49
335 ttsn
-----Original Message-----
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Boyd C.
Braem
Subject: Re: Rocket-List: Re: RV-8 with O-540 in this months EAA Sport
Aviation
--> Rocket-List message posted by: "Boyd C. Braem" <bcbraem@comcast.net>
Bob--
What's this "overloading the wings" stuff? They're still built to
+6/-3g, aren't they? Are these guys "who did their homework" saying
that because of a little extra engine and battery weight that their
wings are more likely to depart the airframe in a "normal flight"
envelope? Something is not right with this picture. What is the empty
weight of these airplanes? And, (reaching under the desk for my
soapbox) why go to all the trouble with a Super-8 mod and not go with an
IO-540 (esp. up there in the Midwest where icing is much more prevalent
than down here in SW Florida)? And, mmmnph, mmnnnppphhh....Oh, thanks,
honey--I was starting to drool, there, wasn't I?
Boyd
RV-Super 6/325 LyCon hp
design gross weight 1900#--flight tested to 2000#--guess what my design
aerobatic weight is?
wings chopped 7" ala Harmon Rocket--lotsa good advice out there in
Bakersfield for anyone wanting to put a -540 in any RV.
Bob Japundza wrote:
>--> Rocket-List message posted by: Bob Japundza <bjapundza@yahoo.com>
>
>The super-8 in SA is owned by a friend of mine. There are four
>super-8's flying here in Indy, and those guys did their homework. They
>have to be very careful flying them in normal flight out of fear of
>overloading the wings. They use a larger 35ah battery mounted mid-way
>in the tailcone. They are about 10mph slower than a Rocket at cruise.
>Regards, Bob
>
>P M Condon <pcondon@mitre.org> wrote:--> Rocket-List message posted by:
>P M Condon
>
>
>There is a picture in the "what our members are building" section of
>the latest EAA sport Aviation mag of a RV-8 with a O-540. A few folks
>over the years have done this with 8's & sixes. Has anyone done the W&B
>and other studies to see the extent of such a undertaking??
>
>
>
>
direct advertising on the Matronics Forums.
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 |
|
| Subject: | Re: RV-8 with O-540 in this months EAA Sport Aviation |
--> Rocket-List message posted by: "Russ Werner" <russ@wernerworld.com>
Ron,
What's your takeoff fuel flow at sea level? That is a pretty good
indicator (and BS filter). I believe you can figure something like:
ff divided by .1 on most piston engines. I'm told it is impossible to
get more than 300 with an RSA5 due to fuel delivery limitations. The
bigger injection units can do it however.
Russ
> I have a balanced 540 with 10 to ones and have
> been wondering how much it actually puts out- it has not been
dynoed. At
> full blow im doing 250 at 5,500 msl
>
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! --
|