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joeing701(at)internet.is
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 Posted: Wed Oct 04, 2006 12:20 pm Post subject: FWF kit for JabiruFWF kit for Jabiru |
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Hello list members.
I thought the VNE for Zenith 701 is 90mph. Has this changed with the new
kits? If not, what is the purpose of getting a higher speed than the
never exceed speed? Is that safe?
Just curious.
Regards,
Johann G.
Z701
do not archive
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john.marzulli(at)gmail.co
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| Posted: Wed Oct 04, 2006 12:52 pm Post subject: FWF kit for JabiruFWF kit for Jabiru |
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Zenith's site lists 110MPH as VNE
Realistically I think 90MPH is VNWE... aka Never Will Exceed.
On 10/4/06, Jóhann Gestur < joeing701(at)internet.is (joeing701(at)internet.is)> wrote: | Quote: | --> Zenith-List message posted by: =?ISO-8859-1?Q?J=F3hann_Gestur?= < joeing701(at)internet.is (joeing701(at)internet.is)>
Hello list members.
I thought the VNE for Zenith 701 is 90mph. Has this changed with the new
kits? If not, what is the purpose of getting a higher speed than the
never exceed speed? Is that safe?
Just curious.
Regards,http://forum===================
== ; -Matt Dralle, Lisntribution"> =
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--
John Marzulli
CH701 in Seattle
Wings and tanks on order!
http://701Builder.blogspot.com/
"Flying a plane is no different than riding a bicycle.. it's just a lot harder to put baseball cards in the spokes. [quote][b]
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p.mulwitz(at)worldnet.att
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| Posted: Wed Oct 04, 2006 1:31 pm Post subject: FWF kit for JabiruFWF kit for Jabiru |
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Hi Johann,
The ZAC web site shows a Vne of 110 mph for the 701. Perhaps this
has changed over time.
Paul
XL fuselage
do not archive
At 01:20 PM 10/4/2006, you wrote:
| Quote: |
<joeing701(at)internet.is>
Hello list members.
I thought the VNE for Zenith 701 is 90mph. Has this changed with the
new kits? If not, what is the purpose of getting a higher speed than
the never exceed speed? Is that safe?
Just curious.
Regards,
Johann G.
Z701
do not archive
|
---------------------------------------------
Paul Mulwitz
32013 NE Dial Road
Camas, WA 98607
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nyterminat(at)aol.com
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| Posted: Wed Oct 04, 2006 4:50 pm Post subject: FWF kit for JabiruFWF kit for Jabiru |
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I concur, 90mph is about the best except when you push that stick forward.
Bob Spudis
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billmileski
Joined: 07 Aug 2006
Posts: 68
Location: Ledyard, CT
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| Posted: Wed Oct 04, 2006 6:44 pm Post subject: Re: FWF kit for JabiruFWF kit for Jabiru |
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Actually, believe it or not, I can obtain 110mph in level flight with a 912S and a Woodcomp fixed pitch propeller. I don't think this is a safe regime in which to operate, but what's nice, is an easy cruise of 80-85mph at 4800rpm or so. I have heard that this propeller is the main reason, but I have no experience with other setups, so who knows. Maybe I have "reflex" in my flaperon position relative to others or something. And I haven't rigorously verified with a GPS and triangular course, but have "loosely" verified using opposing courses several times, so that I'm likely within 5mph of reality. Again, I did this just during test phase and don't recommend operating there. And this is IAS at less than 3500' msl.
Bill Mileski
| Quote: |
I concur, 90mph is about the best except when you push that stick forward.
Bob Spudis
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nyterminat(at)aol.com
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| Posted: Thu Oct 05, 2006 6:32 pm Post subject: FWF kit for JabiruFWF kit for Jabiru |
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Bill,
I have the same setup as you with the Woodcomp prop, and I don't see that kind of airspeed. What kind of empty weight do you have? My cruise speed set up still has me a little nose high attitude and I think that this is what is slowing me down. With a small amount of foward stick the speed shoots up quickly. What pitch do you have the prop set at? I believe I have mine set at 13 degrees.
Bob Spudis
N701ZX
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ggower_99(at)yahoo.com
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| Posted: Fri Oct 06, 2006 9:09 am Post subject: FWF kit for JabiruFWF kit for Jabiru |
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In cross country flights, when we go over the Sierra, the cruise speed is 93 mph indicated at 10,500 or 11,500 ft ASL (depends on heading) engine 5,100 rpm. Just great, perfect trimed.
With turbulence 80 severe turbulence 75, gets rough here some times...
When we go to "flat land" (altitude around 8,000 ft), cruises 85 to 90 in summer. plane near gross, with two and camping gear
Saludos
Gary Gower
Flying from Chapala, Mexico.
701 912S
John Marzulli <john.marzulli(at)gmail.com> wrote:[quote] Zenith's site lists 110MPH as VNE
Realistically I think 90MPH is VNWE... aka Never Will Exceed.
On 10/4/06, Jóhann Gestur < joeing701(at)internet.is (joeing701(at)internet.is)> wrote:[quote]--> Zenith-List message posted by: =?ISO-8859-1?Q?J=F3hann_Gestur?= < joeing701(at)internet.is (joeing701(at)internet.is)>
Hello list members.
I thought the VNE for Zenith 701 is 90mph. Has this changed with the new
kits? If not, what is the purpose of getting a higher speed than the
never exceed speed? Is that safe?
Just curious.
Regards,http://forum===================
== ; -Matt Dralle, Lisntribution"> Get your email and more, right on the [url=http://us.rd.yahoo.com/evt=42973/*http://www.yahoo.com/preview] new Yahoo.com[/url] [quote][b]
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billmileski
Joined: 07 Aug 2006
Posts: 68
Location: Ledyard, CT
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| Posted: Fri Oct 06, 2006 1:31 pm Post subject: Re: FWF kit for JabiruFWF kit for Jabiru |
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Hi Bob,
My plane is a bit heavy with a BRS and probably too much paint, at 670#.
I added strut fairings also, not sure if you have them? The plane also has the bubble doors from Skyshop (know anyone that wants the original doors cheap?). My CG is at about 75 percent toward the rear of the allowed range, which also might help. My Woodcomp 3-blade is set as follows:
1. Place blade so that the six inches or so inboard of the red paint is level. The leading edge of the blade that is.. and this makes the blade look pretty horizontal, with respect to the prop flange center. Then I measure from the floor to the blade tip for consistency on all three blades.
2. Place Warp Drive bubble protractor so outboard edge of protractor is vertical and meets the red/black paint change at the trailing edge of the blade (30mm from tip? 50mm? Can't remember from home here).
3. Use 18 degrees (oh heck, was it 19? I will check if you want!) on the protractor to get a level bubble.
4. Recheck all three blades a couple times. I try to get the bubble exactly centered on each blade.
This setting gives my plane about 5300rpm static at sea level, and at full throttle it pulls to 110mph and approx. 5550rpm. Climb is about 1150fpm from sea level with full fuel and a 175 pound pilot. Often I just poop around at 78mph and 4500 rpm, at something like 3.0 gph.
I also notice in cruise that pictures show that my elevator top surface is very slightly lower ("down elevator") than horizontal. For such an asymmetrical airfoil, this is probably a slightly negative total lift. So in balanced flight, the elevator is probably not creating a lot of negative lift and associated drag, due to a fairly rearward CG. The plane handles the same with and without passengers and baggage, and has been flown at 100% aft CG without obvious handling changes. I think this configuration maintains elevator authority in the flare to lower airspeeds, but I admit the spin and deep stall stability characteristics are unknown to me at 100% aft CG, and I don't plan to test in that configuration (and I haven't and likely won't spin intentionally in any configuration, per the oerating limitations).
Anyway, sorry for blabbing on, and if there's anything else I can tell you about how my plane is set up, lemme know.
Bill
| nyterminat(at)aol.com wrote: | Bill,
I have the same setup as you with the Woodcomp prop, and I don't see that kind of airspeed. What kind of empty weight do you have? My cruise speed set up still has me a little nose high attitude and I think that this is what is slowing me down. With a small amount of foward stick the speed shoots up quickly. What pitch do you have the prop set at? I believe I have mine set at 13 degrees.
Bob Spudis
N701ZX
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