Zenith-List Digest Archive

Sun 11/28/04


Total Messages Posted: 19



Today's Message Index:
----------------------
 
     1. 05:07 AM - Microair and PS PM 1000 intercom (Johann G.)
     2. 05:53 AM - Re: 701 Leading Edge Slats (Robert Eli)
     3. 06:42 AM - Re: Microair and PS PM 1000 intercom (Michael D Crowe)
     4. 06:58 AM - Re: Subaru ICM failure? and ignition performance (Larry McFarland)
     5. 07:12 AM - 701 engines VW vs Corvair vs Jabiru 2200 (baileys)
     6. 07:15 AM - Bush pilot - off topic subject (baileys)
     7. 07:47 AM - Re: Subaru ICM failure? and ignition performance (Dave Alberti)
     8. 07:56 AM - Re: 701 engines VW vs Corvair vs Jabiru 2200 (Patrick Panzera)
     9. 08:20 AM - Re: 701 Leading Edge Slats (Benford2@aol.com)
    10. 09:06 AM - Corvair in 701 (Brandon Tucker)
    11. 10:25 AM - Just when you thought the elections were over... (Jeff Small)
    12. 11:54 AM - Re: Bush pilot - off topic subject (Robert Schoenberger)
    13. 12:49 PM - nose rib layout (ron wehba)
    14. 01:08 PM - Re: nose rib layout (ron wehba)
    15. 01:37 PM - Re: Corvair in 701 (Jim and Lucy)
    16. 02:14 PM - Re: Just when you thought the elections were over... (Zed Smith)
    17. 02:18 PM - Zenith Leading Edge Slat (Howard Carter)
    18. 08:32 PM - Re: Zenith Leading Edge Slat (Hal Rozema)
    19. 09:13 PM - Exchanging engine (Cleone Markwell)
 
 
 


Message 1


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    Time: 05:07:11 AM PST US
    From: "Johann G." <johann@gi.is>
    Subject: Microair and PS PM 1000 intercom
    --> Zenith-List message posted by: "Johann G." <johann@gi.is> Hello list members. I am working on the installation of the radio and intercom in my Z 701, and would need some help from you who have installed a separate intercom (PM 1000) with the Microair 760 Transceiver. I know the Microair has its own built in intercom, but I'd rather have it in a separate unit. I did go to Microair's homepage and downloaded their manual and installation wiring diagram, but they only have the drawing for the PM 501 intercom, which is nothing similar to the PM 1000. Does anyone have a wiring diagram for that setup? I asked Microair, but have not received any reply. Hope you can help, Best wishes, Johann G. Iceland.


    Message 2


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    Time: 05:53:11 AM PST US
    From: "Robert Eli" <robert.eli@adelphia.net>
    Subject: 701 Leading Edge Slats
    --> Zenith-List message posted by: "Robert Eli" <robert.eli@adelphia.net> In the book "Fluid-Dynamic Drag" by Sighard F. Hoerner (1965), page 6-14, the fixed versus movable slats are discussed. Hoerner states: "Generally, however, leading edge slots and slats do not appear to be promising as far as drag is concerned. Their application is rather a necessity in certain wing shapes, to prevent stalling. Figure 20a presents drag characteristics of an open (fixed slat). It is seen that in condition (b) with no flow through the slot, drag is comparatively small." Figure 20a shows a drag coefficient of 0.03 at moderate angles of attack (flow through the slot) and a drag coefficient (Cd) of 0.018 at low angles of attack (no flow through the slot). This latter value compares to a CD of 0.015 for stowed (retracted slat). This implies that the drag of a fixed slat is about the same as a retracted slat at low angles of attack. It should be noted that the Cd quoted is based on the "profile, or form drag", and does not include "induced drag" as a result of the rearward component of the lift vector. The above results are supported by a article in Sport Aviation, March 2004, "Looking for Lift" by Neal Willford EAA-169108. On page 70: " Wind tunnel testing by Fieseler (of the Fieseler Storch) showed that the drag of a carefully located fixed slat was 65% higher than the airfoil without a slat. This is a big penalty, but the testing also showed that with the slat stowed, the drag was still 60 percent higher than the clean airfoil. Not surprisingly, Fieseler went with a fixed slat in production." On page 71: "The leading edge slat does not increase lift in the same way as a trailing edge flap. The slat slows the airspeed down at the leading edge and reduces the "Cp spike" shown in Figure 1. This results in less lift at a given angle of attack than the same wing without a slat." This latter information is important to note. Figure 5 shows that the lift of the clean airfoil is a little higher all the way up to the point of stall, as compared to the same airfoil with the fixed slat. Stall begins at about 16 degrees angle of attack with the clean airfoil, as compared to 24 degrees angle of attack with the slat. Therefore, the slat only helps in delaying the stalling point, and does not contribute to extra lift below the stall angle of attack of the clean airfoil. Of course, with the slat, the wing continues to develop large lift well beyond the clean airfoil stall point. Based on all of this, it doesn't appear that there is much to be gained by just moving the slat to a stowed condition, unless the shape of the slat is specifically designed to give a very clean fit to the remaining airfoil in the stowed condition. My bet is that this would be very hard to achieve in the typical homebuilt design. It is also my bet that the moveable slat designs (as seen on the CH-701) do not perform significantly better than the fixed Chris Heintz fixed slat, when it comes to drag at low angles of attack. Bob Eli CH-701 -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Chuck Deiterich Subject: Re: Zenith-List: 701 Leading Edge Slats --> Zenith-List message posted by: "Chuck Deiterich" <cfd@thegateway.net> At Oshkosh C. Heintz told me that a low angles of attack (cruise) the slat does not funnel air and acts more like a leading edge. I'd be cautious about changing the wing shape without talking to Heintz. Chuck D. N701TX ----- Original Message ----- From: "Ken Lyons" <krl55@ccser.com> Subject: Re: Zenith-List: 701 Leading Edge Slats > --> Zenith-List message posted by: Ken Lyons <krl55@ccser.com> > > I was under the impression that at cruise angle of attack, there was > very little drag penalty for the slats. I think this was because there > is little air flow through the slat at that AOA. I would be interested > to hear of the results of an A-B comparison between a plane with its > slats open and covered. > > Ken Lyons > 701 kit > > Robert Eli wrote: > > > --> Zenith-List message posted by: "Robert Eli" <robert.eli@adelphia.net> > > > > > > I talked to Chris Heintz about the design details of the 701 airfoil and > > origins of the slat during AirVenture this past summer. He used a very old > > classic airfoil, the NACA 640-18. The slat slot was created by simply taking > > the standard airfoil cross section drawing and adding a properly shaped > > channel from the lower side to the upper side of the airfoil. Thus, the > > slat is the nose portion of the standard NACA 640-18 airfoil. If you remove > > the slat, you have, for all practical purposes, cut the nose off the > > airfoil. If you look at the airfoil shape from the slot back, it has a very > > blunt nose and is not an acceptable airfoil. In my opinion, in removing the > > slat, some effective wing area is lost (the slat produces some lift on its > > own)and the very blunt nose will result in very unsatisfactory performance, > > possibly very dangerous. I suspect the stall characteristics might be very > > poor, and certainly unpredictable. My advice is NOT TO REMOVE THE SLAT. > > > > The proper modification (if one must) is to build covers for the slat slots, > > which maintains the original NACA 640-18 shape. Of course, by removing the > > slots, the lift distribution and behavioral characteristics of the airfoil > > are changed, and the aircraft flight characteristics will be significantly > > affected. I have been toying with the idea of making removable slat slot > > covers, but have given it up because of the danger of flying the same > > aircraft with drastically different low speed handling characteristics, > > depending on whether the covers are on or off. I'm an "absent-minded > > professor", and I'm afraid that I might react to an emergency as if the > > plane were in the opposite wing configuration. > > > > Bob Eli > > CH-701 > > > > -----Original Message----- > > From: owner-zenith-list-server@matronics.com > > [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Larry Martin > > To: zenith-list@matronics.com > > Subject: Re: Zenith-List: 701 Leading Edge Slats > > > > --> Zenith-List message posted by: "Larry Martin" <lrm@isp.com> > > > > There is no logical reason it shouldn't, you might have to adjust you CG. > > You should pick you some speed too. If you really don't want the slats you > > might consider not having the slats to stand off, just attack flush to the > > leading edge. Larry N1345L > > ----- Original Message ----- > > From: "Jake Reyna" <jake@lockhart-tx.com> > > To: <Zenith-List@matronics.com> > > Subject: Zenith-List: 701 Leading Edge Slats > > > > > > > >>--> Zenith-List message posted by: "Jake Reyna" <jake@lockhart-tx.com> > >> > >>I'm bored, can't even take the boat out because of the wind .... > >> > >>Here's a question to help burn some holiday calories. > >> > >>Has anyone flown the 701 without leading edge slats? Zenith states "The > >>disadvantage of leading-edge slats is that the air acceleration in the > > > > slot > > > >>requires energy (it creates additional drag)" My warped thinking tells me > >>that the wing would still fly, but you would lose the STOL performance. I > >>live in Texas, the shortest airfield I'm going to fly into will be at > > > > least > > > >>3,000', maybe I'll fly out from the ranch, but I have at least 1,000' > >>unobstructed. The 701 is a great airplane, but what if you don't need the > >>high lift? There's no doubt that take off roll would increase, as would > >>stall speed, but that's not an issue. Would the airplane fly safely? What > >>about using vortex generators instead of leading edge slats? > >> > >>I have an enquiring mind .... And time on my hands :-) > >> > >>Jake > >> > >> > > > > > > > > > > > > > > > > > > > >


    Message 3


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    Time: 06:42:11 AM PST US
    From: "Michael D Crowe" <rv8a@bellsouth.net>
    Subject: Microair and PS PM 1000 intercom
    --> Zenith-List message posted by: "Michael D Crowe" <rv8a@bellsouth.net> Johann, I put a PM1000 and an ICOM in my brothers 701. If you do not get someone to send you a wiring diagram I could come up with one in a couple of days. Mike Crowe Subject: Zenith-List: Microair and PS PM 1000 intercom --> Zenith-List message posted by: "Johann G." <johann@gi.is> Hello list members. I am working on the installation of the radio and intercom in my Z 701, and would need some help from you who have installed a separate intercom (PM 1000) with the Microair 760 Transceiver. I know the Microair has its own built in intercom, but I'd rather have it in a separate unit. I did go to Microair's homepage and downloaded their manual and installation wiring diagram, but they only have the drawing for the PM 501 intercom, which is nothing similar to the PM 1000. Does anyone have a wiring diagram for that setup? I asked Microair, but have not received any reply. Hope you can help, Best wishes, Johann G. Iceland.


    Message 4


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    Time: 06:58:23 AM PST US
    From: "Larry McFarland" <larrymc@qconline.com>
    Subject: Re: Subaru ICM failure? and ignition performance
    --> Zenith-List message posted by: "Larry McFarland" <larrymc@qconline.com> The only failure I experienced was the magnetic pickup that reads the flywheel on the electronic ignition. I added dual pickup ignition to the distributor as a precautionary measure. Never had a failure of the ND system module. Seems that everyone else has and that's why I went with the Paul's dual ignition and TP45s. I'm still only using one of the pickups in the distributor and the electronic MSD type as B-ignition. Dual source adds to the security and if one module or the magnetic pickup goes, connection of two wires will restore a second backup. Both pickups are LX600, Coils are original Stratus IC107s. Larry Subject: Re: Zenith-List: Subaru ICM failure? and ignition performance > --> Zenith-List message posted by: Michel Therrien <mtherr@yahoo.com> > > OK... but when the ICM failed, what coils were used? > what pickup? (I assume it was a subaru ND picktup) > > Michel > > > --- Larry McFarland <larrymc@qconline.com> wrote: > >> --> Zenith-List message posted by: "Larry McFarland" >> <larrymc@qconline.com> >> >> Michel, >> I believe the flyweight advance in the Stratus >> ignition... >


    Message 5


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    Time: 07:12:31 AM PST US
    From: "baileys" <baileys@ktis.net>
    Subject: 701 engines VW vs Corvair vs Jabiru 2200
    --> Zenith-List message posted by: "baileys" <baileys@ktis.net> Hello Everyone, I have spent a lot of time considering and discussing various engines for the 701. IMHO the Corvair (WW version) makes and excellent aircraft engine, but it's weight the fact that Williams recommends that you use only aero fuel disqualifies it for me. I have had extensive conversations with Jeremy Monnett (AeroVee) about the desirability of using one of their engines in a 701. His advice is that it will work just fine with the correct prop. The fact the there is at least one 701 flying with a direct drive Jabiru 2200 that has almost the same RPM/Power characteristic as the AeroVee adds credence to his claim.. The Jabiru 2200 is also a fine engine but out of my price range. Price wise the Corvair is the cheapest. Next is the direct drive VW, then the Redive/VW. I have a friend with a 1915 cc redrive VW in a 701 and he is very satisfied with performance. His plane will take off at cruise power and will jump the chocks at full power with brakes applied. (I think he is on this list so he can out himself if he wishes.) IMHO The biggest problem I see with the VW in a slow aircraft is cooling the heads/valves. The more power you try to pull out of the engine the more heat it must dissipate. Heat damage to the heads is cumulative. Run it too hot too many times and you can be 100% sure you are going to have a very short engine life. Another problem you are going to run into with a big bore/stroker engine is the crankcase. The case is now considered a throw away item. Of course you can buy an aluminum case, but there is a weight penalty. Also don't over stress the engine, watch manifold pressure to insure that the engine isn't working too hard. What are my plans? I plan on using a redrive/VW no larger than 1915 cc. This allows the use of a stock crank. It will have an oil cooler and will be baffled very carefully to insure the heads are getting enough airflow around them.. I plan on flying it conservatively, maintaining it well, doing a valve somewhere around every 200 hours. I'm not advising anyone else this is just what I my plans are. There are people around with years and years of experience flying VW's listen to there advice very carefully. Bob B. 701 #75552 P.S. I'm also a member in good standing of the Poverty Pilots Association. ----- Original Message ----- From: Jake Reyna To: Zenith-List@matronics.com Sent: Saturday, November 27, 2004 4:22 PM Subject: Zenith-List: Re: corvair --> Zenith-List message posted by: "Jake Reyna" <jake@lockhart-tx.com> Another option for the 701 would be the AeroVee 2002 http://www.aeroconversions.com/ 2180cc, 80hp, 161 lb VW conversion that you assemble for $5,700. This could be a sweet package ..... Jake


    Message 6


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    Time: 07:15:35 AM PST US
    From: "baileys" <baileys@ktis.net>
    Subject: Bush pilot - off topic subject
    --> Zenith-List message posted by: "baileys" <baileys@ktis.net> http://teamhouse.tni.net/humor/bushpilot/bush_pilot.htm Here is problem I hope never to encounter. ROFLOL Bob B.


    Message 7


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    Time: 07:47:47 AM PST US
    From: "Dave Alberti" <daberti@execpc.com>
    Subject: Subaru ICM failure? and ignition performance
    --> Zenith-List message posted by: "Dave Alberti" <daberti@execpc.com> That sounds like a weak ground connection. -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com]On Behalf Of Michel Therrien Subject: Re: Zenith-List: Subaru ICM failure? and ignition performance --> Zenith-List message posted by: Michel Therrien <mtherr@yahoo.com> Hi Larry, Today, I went back to airport to look at my installation some more before doing the conversion. I could not replicate the results I got yesterday... to the point I'm wondering if I only had such dream. I'm puzzled. Today, both Subaru and HEI ignition systems were showing the same performance.


    Message 8


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    Time: 07:56:21 AM PST US
    From: "Patrick Panzera" <panzera@experimental-aviation.com>
    Subject: 701 engines VW vs Corvair vs Jabiru 2200
    --> Zenith-List message posted by: "Patrick Panzera" <panzera@experimental-aviation.com> > Hello Everyone, > > I have spent a lot of time considering and discussing various engines for the > 701. IMHO the Corvair (WW version) makes and excellent aircraft engine, but > it's weight the fact that Williams recommends that you use only aero fuel > disqualifies it for me. WW recommends avgas for anything flying, not just the Corvair. He runs mogas in his land based Corvair (as do countless other Corvair drivers), and the engine does just fine. Many people flying Corvairs run mogas too. From the engine standpoint, there's nothing wring with running mogas in a Corvair converted for aviation... but there are many other reasons why one should use avgas in an airplane. The decision is yours, I'm not trying to change your mind, I just don't want others getting the wrong idea about the Corvair engine. Pat


    Message 9


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    Time: 08:20:18 AM PST US
    From: Benford2@aol.com
    Subject: Re: 701 Leading Edge Slats
    --> Zenith-List message posted by: Benford2@aol.com In a message dated 11/28/2004 6:53:51 AM Mountain Standard Time, robert.eli@adelphia.net writes: > > Based on all of this, it doesn't appear that there is much to be gained by > just moving the slat to a stowed condition, unless the shape of the slat is > specifically designed to give a very clean fit to the remaining airfoil in > the stowed condition. My bet is that this would be very hard to achieve in > the typical homebuilt design. It is also my bet that the moveable slat > designs (as seen on the CH-701) do not perform significantly better than the > fixed Chris Heintz fixed slat, when it comes to drag at low angles of > attack. > > Bob Eli > CH-701 > Very well explained Bob !!!!!!!!! On a further note a few local pilots I hangar fly with often pilot Sabreliners. There planes have spring loaded leading edge slats that retract at about 160 mph due to the forces of air pushing in on them. When they do nest they fit real tight into the leading edge of the wing which makes them almost invisible to drag. All the pilots agree this design is very effective in modifying the wing for slow speed flight. Bob is correct that it would take alot of work to make a nesting spot in our wings so Chris kept it simple and made them fixed. . Folks, we have to admit the 701/ 801 design is very aerodymanically dirty, this is the trade off of having the outstanding slow flight numbers we all see in our birds. On a side note there are a few quirks of the Sabreliner that does get these pilots attention from time to time. In rough air on final sometimes the slats will deploy and retract independant from one another, this does make for a handful of control but nothing to take the plane out of the sky. All these pilots say you know it's going to happen so be ready for it.. Also the slats are NOT heated and they will ice up, this makes for a little faster approach speed. The real problem starts when the slot starts to fill up with ice on those severe icing conditions. All they can do is land it using good piloting skills and either deice it or put the plane in a heated hangar till the slot melts clear. Ben Haas N801BH Jackson Hole Wy


    Message 10


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    Time: 09:06:43 AM PST US
    DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=UcJAtiRr6Ya2eOgIlNd0YfHqC2o20ijjPoi4UzI4XTZ64ZIzI6ZDlf1aIvGts4sZi0TgfEm5gQTYsTBzUeqOIxCDqmTt00J4TqL22RvaH3dg7hka1jjOsgilKp0NBUV+6qo+0JpGKq99iKt04tTdtUjGnK25JH9sR4VvGcNYdj4= ;
    From: Brandon Tucker <btucke73@yahoo.com>
    Subject: Corvair in 701
    --> Zenith-List message posted by: Brandon Tucker <btucke73@yahoo.com> Rog & John, I know of a 701 in Australia that had a subaru installed. -Let's just say that these guys don't ask for clearance through ZAC when they modify! The EMPTY weight came in at 1200 lbs!!! I am told that it flew fine with "no dramas." Obviously I would not recommend this, but my point is that it has been done, and someone has already mentioned that the Corvair comes in lighter than the Subie. Another option you could look into that hasn't been mentioned in this thread is the GEO conversion. Check out: http://www.raven-rotor.com/ Their set up is comprable in price to the Subie conversion, much lighter than the Subie and Corvair, and they even have a turbo setup. Disclaimer: I am not a 701 guy, and never played one on tv. PS. Rog. -That post about naked flying was freakin' funny! John. -Stay safe in the gulf. I was there when the festivities started. No fun! Respectfully, Brandon Tucker 601 HDS wings done, tail done, center wing done working on aft fuselage ---------------------------------


    Message 11


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    Time: 10:25:05 AM PST US
    From: "Jeff Small" <zodiacjeff@msn.com>
    Subject: Just when you thought the elections were over...
    Seal-Send-Time: Sun, 28 Nov 2004 13:21:22 -0600 --> Zenith-List message posted by: "Jeff Small" <zodiacjeff@msn.com> >I know of a 701 in Australia that had a subaru installed. -Let's just say that these guys don't ask for >clearance through ZAC when they modify! The EMPTY weight came in at 1200 lbs!!! 1200 pounds!!!! Far, far exceeds the credibility limit. Those Aussie just finished off a case of Fosters when they told that one. do not archive


    Message 12


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    Time: 11:54:26 AM PST US
    From: "Robert Schoenberger" <hrs1@frontiernet.net>
    Subject: Re: Bush pilot - off topic subject
    --> Zenith-List message posted by: "Robert Schoenberger" <hrs1@frontiernet.net> This is the funniest thing I've seen in weeks. Thanks for sharing it. Robert Schoenberger do not archive ----- Original Message ----- From: "baileys" <baileys@ktis.net> Subject: Zenith-List: Bush pilot - off topic subject > --> Zenith-List message posted by: "baileys" <baileys@ktis.net> > > > http://teamhouse.tni.net/humor/bushpilot/bush_pilot.htm > > Here is problem I hope never to encounter. ROFLOL > Bob B. > > >


    Message 13


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    Time: 12:49:48 PM PST US
    From: "ron wehba" <rwehba@cox.net>
    Subject: nose rib layout
    --> Zenith-List message posted by: "ron wehba" <rwehba@cox.net> on 7-V-1 what am I missing ,cannot find the total length of the nose rib blank? for a 701. thanks ron w in tx


    Message 14


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    Time: 01:08:49 PM PST US
    From: "ron wehba" <rwehba@cox.net>
    Subject: Re: nose rib layout
    --> Zenith-List message posted by: "ron wehba" <rwehba@cox.net> I found the measurements, just needed to stare at it for a minute. ----- Original Message ----- From: "ron wehba" <rwehba@cox.net> Subject: Zenith-List: nose rib layout > --> Zenith-List message posted by: "ron wehba" <rwehba@cox.net> > > on 7-V-1 what am I missing ,cannot find the total length of the nose rib > blank? > for a 701. > > thanks ron w in tx > > >


    Message 15


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    Time: 01:37:23 PM PST US
    From: Jim and Lucy <jpollard@ciaccess.com>
    Subject: Re: Corvair in 701
    --> Zenith-List message posted by: Jim and Lucy <jpollard@ciaccess.com> At 09:03 AM 11/28/2004 -0800, you wrote: >The EMPTY weight came in at 1200 lbs!!! It almost sounds like he must have had 3 subarus in that plane to get 1200 lbs. Jim Pollard Merlin Ont ch601hds ea81 wireing do not archive


    Message 16


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    Time: 02:14:09 PM PST US
    From: Zed Smith <zsmith3rd@earthlink.net>
    Subject: Re: Just when you thought the elections were over...
    --> Zenith-List message posted by: Zed Smith <zsmith3rd@earthlink.net> I would guess that this the same 701 which has the R-985 radial engine installed as a pusher. More than a little Wild Turkey this weekend. Nice photo of sleeping kitty-cats. Zed Smith 701/r912/90% etc do not archive


    Message 17


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    Time: 02:18:34 PM PST US
    From: Howard Carter <howado@cwia.com>
    Subject: Zenith Leading Edge Slat
    --> Zenith-List message posted by: Howard Carter <howado@cwia.com> To Bob Eli and others interested in the slat issues; The Pegastol wing used on the CH701 uses a NACA 2415 airfoil, so this may account for the increased cruise speed of 15 mph, rather than the fact that the slat is retracted at speeds greater than 30 mph. The slat is also different in shape, so it may actually have less drag when retracted. The Pegastol wing has four slats, two on each side, and they are independent of each other.. The flight shown on the Dedalius DVD clearly shows the sections retracting and extending as the aircraft is maneuvered in slow flight. Some other features also contribute to the cruise speed increase, such as streamlined struts, and no jury struts. Howard Carter


    Message 18


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    Time: 08:32:34 PM PST US
    From: Hal Rozema <hartist1@cox.net>
    Subject: Re: Zenith Leading Edge Slat
    --> Zenith-List message posted by: Hal Rozema <hartist1@cox.net> Howard Carter wrote: >--> Zenith-List message posted by: Howard Carter <howado@cwia.com> > >To Bob Eli and others interested in the slat issues; > >The Pegastol wing used on the CH701 uses a NACA 2415 airfoil, so this >may account for the increased cruise speed of 15 mph, rather than the >fact that the slat is retracted at speeds greater than 30 mph. The slat >is also different in shape, so it may actually have less drag when >retracted. The Pegastol wing has four slats, two on each side, and they >are independent of each other.. The flight shown on the Dedalius DVD >clearly shows the sections retracting and extending as the aircraft is >maneuvered in slow flight. Some other features also contribute to the >cruise speed increase, such as streamlined struts, and no jury struts. > >Howard Carter > > > Now your starting to catch on... Red apples are red because they aren't oranges. All the other changes are "go fast". The retracting slats add nothing in cruise (lowest angle of incidence). The numbers are not for equal aircraft ... if they were the cruise speeds would be identical. Hal ThePlaneFolks.Net


    Message 19


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    Time: 09:13:07 PM PST US
    From: Cleone Markwell <cleone@rr1.net>
    Subject: Exchanging engine
    --> Zenith-List message posted by: Cleone Markwell <cleone@rr1.net> I flew my CH601HD with the Rotax 912UL 80 for the last time today and it is working well. However, recently I bought a new Corvair engine from William Wynne and plan to put it on this airframe. This afternoon I started removing the Rotax. Rather than trying to store it I am considering selling my Fire Wall Forward if anyone is interested. This is all from Zenith; motor mount to carbon fiber 3 blade warp drive prop. This engine started flying June 27, 2001 and now has 284.5 hours of tach time. The first reasonable offer will be accepted from anyone near enough to come and get it. I live in Casey, Illinois, 62420 and the engine is at our airport: 1H8. Cleone




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