---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Sat 02/24/07: 21 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:56 AM - Jury struts (Brett Hanley) 2. 03:50 AM - Re: Zenair News (Gbrac80@aol.com) 3. 04:33 AM - Re: Zenair News (Paul Mulwitz) 4. 05:07 AM - Re: navaid servo installation (Michel Therrien) 5. 05:25 AM - wow... web site usage. (Michel Therrien) 6. 05:40 AM - Re: CH701 Landing Lights (Tommy Walker) 7. 06:44 AM - Re: Zenair News (LarryMcFarland) 8. 07:04 AM - Re: Zenair News (TxDave) 9. 07:35 AM - Re: 1st Hundred Hours of Building (XL) (Bill Naumuk) 10. 08:04 AM - Re: wow... web site usage. (Tim Juhl) 11. 09:05 AM - Re: Engines (Brandon Tucker) 12. 09:37 AM - Re: Re: Engines (Bill Naumuk) 13. 10:47 AM - For Sale 701 plans project (pat & charlene larson) 14. 10:52 AM - navaid help (Jeff Small) 15. 11:22 AM - Re: Re: Engines (Paul Mulwitz) 16. 11:35 AM - Re: 1st Hundred Hours of Building (XL) (Rich) 17. 11:42 AM - Re: 1st Hundred Hours of Building (XL) (Rich) 18. 01:42 PM - Re: 1st Hundred Hours of Building (XL) (Bill Naumuk) 19. 04:56 PM - Re: Re: Engines (n801bh@netzero.com) 20. 06:15 PM - Re: Engines (Noel Loveys) 21. 11:26 PM - Re: Re: Engines (BadBob) ________________________________ Message 1 _____________________________________ Time: 01:56:36 AM PST US From: Brett Hanley Subject: Zenith-List: Jury struts Zenith has a revised drawing for jury struts. Call them and they will send you a copy.=0A=0AGood luck=0ABrett=0A=0A have my struts installed and now I am working on the jury struts. Using the dimension=0Aon the prints, the j ury strut lower horizontal (500 mm long piece) does=0Anot work out if place d 1200 mm up from the center of the lower strut mounting=0Ahole (it is to l ong). In addition, if I used the given location, the jury strut=0Aangel bra ckets that are attached to the bottom of the wing ________________________________ Message 2 _____________________________________ Time: 03:50:19 AM PST US From: Gbrac80@aol.com Subject: Re: Zenith-List: Zenair News In a message dated 2/24/2007 2:35:05 A.M. Eastern Standard Time, macstar@raider.co.nz writes: --> Zenith-List message posted by: "Ian McClelland" Do any list members subscribe to the Zenair Newsletters? Ian, I have subscribed to Zenair news since it was first published. If so any comments as to the quality/usefulness of the publication? The quality is first class! Chris Heintz started publishing in the 1970's, then turned it over to somebody else when he realized it was a huge task that kept him from his primary task of designing. The publication has continued to improve, as a result of Chris' support for what he recognized (and apparently still does) as a critical part of his business. On the face of it to me it appears to be necessary to ensure you have the latest recommendations and safety information from Zenith. I agree with your assessment. Each newsletter contains the following, packed into 12 pages: 1. Bulletins (important notices/updates etc) 2. Column written by Chris Heintz 3. Fly-in announcements and reports 4. Construction updates from Chris Heintz 5. Other suggestions from builders 6. Flying Zenair aircraft 7. New subscriber list 8. General news from subscribers 9. For Sale and Wanted ads I have some reservations about having to pay money for safety related and technical information that should be readily available to anyone who has purchased a set of plans or a kit. My advice: Don't let your reservations cloud your judgment to the extent you deny yourself a valuable resource, available at a very reasonable cost. If I ask myself "Is the publication worth an additional $25 per year?" the answer is "YES, very much so"!! Try offering submissions to the newsletter (Item 5 in list above) you may win yourself a free subscription! An E-mail service would be a low cost option. Try sending an Email to newsletter editors Steve & Sharon Krog and ask - _www.sskrog@zenair.org_ (http://www.sskrog@zenair.org) Are there any opinions out there? Uh huh, I reckon so. Ian McClelland New Zealand Plans builder of 601XL. Tail and flight controls done. Wings started. Rgds, Mike Creer CH200 Plans Builder


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AOL now offers free email to everyone. Find out more about what's free from AOL at http://www.aol.com. ________________________________ Message 3 _____________________________________ Time: 04:33:13 AM PST US From: Paul Mulwitz Subject: Re: Zenith-List: Zenair News Hi Ian, The Zenair newsletter is not affiliated with Zenith in any significant way. It is a separate operation with regular inclusion of thoughts from Chris Heintz (who, for the most part, also has nothing to do with Zenith). My advice to you is to go ahead and subscribe for a year to the Zenair newsletter and see if you find it valuable. Paul XL fuselage do not archive At 11:30 PM 2/23/2007, you wrote: > >Do any list members subscribe to the Zenair Newsletters? >If so any comments as to the quality/usefulness of the publication? >On the face of it to me it appears to be necessary to ensure you have the >latest recommendations and safety information from Zenith. I have some >reservations about having to pay money for safety related and technical >information that should be readily available to anyone who has purchased a >set of plans or a kit. >An E-mail service would be a low cost option. >Are there any opinions out there? > >Ian McClelland >New Zealand >Plans builder of 601XL. Tail and flight controls done. Wings started. > > - ________________________________ Message 4 _____________________________________ Time: 05:07:09 AM PST US From: Michel Therrien Subject: Re: Zenith-List: navaid servo installation Here is how I did on my CH601-HD http://mthobby.pcperfect.com/ch601/images/Dcp01144.jpg http://mthobby.pcperfect.com/ch601/images/Dcp01145b.JPG These pictures are on the following page: http://mthobby.pcperfect.com/ch601/chcontrols2.htm Michel --- alex_001 wrote: > > > hello, can someone please help me with some pics or > any other help and suggestions for installing navaid > servo in my 601xl > thank you > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p'933#96933 > > > > > > > > > browse > Subscriptions page, > FAQ, > http://www.matronics.com/Navigator?Zenith-List > > Web Forums! > > > > > ---------------------------- Michel Therrien CH601-HD, C-GZGQ http://mthobby.pcperfect.com/ch601 http://www.zenithair.com/bldrlist/profiles/mthobby http://pages.infinit.net/mthobby Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. http://farechase.yahoo.com/promo-generic-14795097 ________________________________ Message 5 _____________________________________ Time: 05:25:30 AM PST US From: Michel Therrien Subject: Zenith-List: wow... web site usage. DO NOT ARCHIVE I received a notification that someone from Oklahoma signed my guestbook. It's been a long time since I looked at my web site usage and guestbook signatures. After all, I don't maintain the site since quite a while... perhaps I should start a new one with flying experiences. Anyway, I found that I have over 200 signatures (!), over 50 000 unique visits. And there is still an average of over 100 visits a week. Thanks all! Michel do not archive ---------------------------- Michel Therrien CH601-HD, C-GZGQ http://mthobby.pcperfect.com/ch601 http://www.zenithair.com/bldrlist/profiles/mthobby http://pages.infinit.net/mthobby Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. ________________________________ Message 6 _____________________________________ Time: 05:40:54 AM PST US From: "Tommy Walker" Subject: Re: Zenith-List: CH701 Landing Lights Check this out: http://www.ch701.com/builders/Steve%20Johnston/Steve_Mods.htm ________________________________ Message 7 _____________________________________ Time: 06:44:54 AM PST US From: LarryMcFarland Subject: Re: Zenith-List: Zenair News Hi Ian, I've subscribed to the Zenith Newsletter for the last 6 years and it's been mostly informative and interesting reading. Always time to slow down and get detail not normally covered by magazines and some for sale items have been helpful. Larry McFarland - 601HDS at www.macsmachine.com Ian McClelland wrote: > > Do any list members subscribe to the Zenair Newsletters? > If so any comments as to the quality/usefulness of the publication? > On the face of it to me it appears to be necessary to ensure you have the > latest recommendations and safety information from Zenith. I have some > reservations about having to pay money for safety related and technical > information that should be readily available to anyone who has purchased a > set of plans or a kit. > An E-mail service would be a low cost option. > Are there any opinions out there? > > Ian McClelland > New Zealand > Plans builder of 601XL. Tail and flight controls done. Wings started. > > > ________________________________ Message 8 _____________________________________ Time: 07:04:51 AM PST US Subject: Zenith-List: Re: Zenair News From: "TxDave" Hello Ian, When I started building my XL from plans last year I subscribed to the newsletter and also ordered 5 years of back issues. The newsletter is not "necessary", but is fun to read. I enjoy the articles on other builders and their projects. There is also a "For Sale" section in each issue that can be interesting at times. The latest information related to updates and technical issues can be found on the Zenith online builder's pages. Personally, I think ZAC does a pretty good job of posting plan and photo assembly guide updates. Dave Clay Temple, TX 95% finished with my right wing http://www.daves601xl.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=97050#97050 ________________________________ Message 9 _____________________________________ Time: 07:35:49 AM PST US From: "Bill Naumuk" Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) Rich- A final note. This e-mail may sound negative, but it's actually a good thing. You'll find you actually save time by taking the time to fully research any procedure you're unsure of before cutting metal. You just have to get over the self imposed time line we all had when we first started. Good building! Bill Naumuk HDS Fuselage Townville, Pa ----- Original Message ----- From: Bill Naumuk To: zenith-list@matronics.com Sent: Friday, February 23, 2007 11:25 PM Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) Rich- Sooner or later you're going to slip up and blow your timeline to hell. Homebuilder's fact of life. Take the advice of two Bills- kick back and relax. You WILL screw up. There isn't a builder on this list who hasn't! Forewarned is forearmed. do not archive Bill Naumuk HDS Fuselage Townville, Pa ----- Original Message ----- From: JAPhillipsGA@aol.com To: zenith-list@matronics.com Sent: Friday, February 23, 2007 7:36 PM Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) Rich, remember it's not a race. You're okay to enjoy it more. Drink a few more adult beverages along the way, tell your wife how difficult the work is, etc. We have all convinced our spouses it may take years and years and thousands and thousands of dollars to get to where your at. Please keep this a secret or they will have us painting the porch ceiling, changing the oil in their car and mowing the lawn. Yeach ! Best regards, Bill of Georgia ************************************** AOL now offers free email to everyone. Find out more about what's free from AOL at http://www.aol.com. href="http://www.matronics.com/Navigator?Zenith-List">http://www.matron href="http://forums.matronics.com">http://forums.matronics.com ________________________________ Message 10 ____________________________________ Time: 08:04:43 AM PST US Subject: Zenith-List: Re: wow... web site usage. From: "Tim Juhl" As an official "old geezer" (started my career before computers and ended it as a school tech director) I must say that the web is a wonderful thing. Sure there is a lot of junk out there but when you sift thru the sites there is an incredible amount of info available. Sites like yours are a great help to those of us who are building (or contemplating) building an aircraft. I ran a network link for my laptop out to my workshop so I can study selected builders sites when I bump into a question or obstacle. Builder's sites and this discussion group make building so much easier than it would have been before the internet age. Thanks to all for sharing! Tim -------- DO NOT ARCHIVE ______________ CFII Champ L16A flying Zodiac XL - Jabiru 3300A Working on wings Read this topic online here: http://forums.matronics.com/viewtopic.php?p=97059#97059 ________________________________ Message 11 ____________________________________ Time: 09:05:10 AM PST US From: Brandon Tucker Subject: Zenith-List: Re: Engines >> As RPM increases, the speed of the propeller tip also increases >>according to simple geometry. True. >> As the propeller tip approaches the speed of sound >>it becomes inefficient, True. >>and if allowed to hit the speed of sound it can be destroyed. I would love to see your reference on this one. The Texan I fly on weekends has the tips go supersonic just about every flight. I haven't done the math, and don't care to, but you can hear the difference when it takes off. When I take off, I pull back the prop as soon as I get the gear up, and it purrs by. Most of our pilots leave the prop up until at altitude. The sound is a high pitched whine. The difference in RPM is only 100 - 200. You can often hear the same thing on Bonanzas and others if the prop is left up. R/ Brandon 601 HDS / TD / Corvair 70 hours Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/ ________________________________ Message 12 ____________________________________ Time: 09:37:36 AM PST US From: "Bill Naumuk" Subject: Re: Zenith-List: Re: Engines Or physics, depending on how you look at it. do not archive Bill Naumuk HDS Fuselage Townville, Pa ----- Original Message ----- From: "Brandon Tucker" Sent: Saturday, February 24, 2007 12:00 PM Subject: Zenith-List: Re: Engines > > > >>> As RPM increases, the speed of the propeller tip > also increases >>according to simple geometry. > > True. > >>> As the propeller tip approaches the speed of sound > >>>it becomes inefficient, > > True. > >>>and if allowed to hit the speed of sound it can be > destroyed. > > I would love to see your reference on this one. The > Texan I fly on weekends has the tips go supersonic > just about every flight. I haven't done the math, and > don't care to, but you can hear the difference when it > takes off. When I take off, I pull back the prop as > soon as I get the gear up, and it purrs by. Most of > our pilots leave the prop up until at altitude. The > sound is a high pitched whine. The difference in RPM > is only 100 - 200. You can often hear the same thing > on Bonanzas and others if the prop is left up. > > R/ > > Brandon > 601 HDS / TD / Corvair > 70 hours > > > > Never miss an email again! > Yahoo! Toolbar alerts you the instant new Mail arrives. > http://tools.search.yahoo.com/toolbar/features/mail/ > > > > ________________________________ Message 13 ____________________________________ Time: 10:47:31 AM PST US From: pat & charlene larson Subject: Zenith-List: For Sale 701 plans project Due to health reasons I'm forced to sell my 701 plans project. Wings, tail group, rear fuselage with extended baggage, firewall completed, all assembled parts zinc chromated. Forward fuselage almost completed, slat and flaperon parts formed with jig to assemble. Have basic vfr instruments except engine, Matco wheels, brakes and axles with turf tires, electric trim, strobes, Flightcom headsets, Zenair amphibious float plans and wheels, two turbo geo g10 engines with mount for Raven re drive and Raven manual, GM engine manuals, extra 4x12 sheets of .025 and .032 plus extra .016, .040 etc. All 4130 plus needed for completion, Lowrance hand held gps and Icom hand held , 6' homebuilt heavy duty brake and more. $14,500. Please contact me of list. ________________________________ Message 14 ____________________________________ Time: 10:52:24 AM PST US From: "Jeff Small" Subject: Zenith-List: navaid help For the gent who wanted to take GPS info to his Navaid: try http://www.porcine.com/gps/sc/sc_index.shtml Mine works fine with my Garmin 196. Doubt you'll use all the pins you have on the back of the 296 but you could call Garmin help and I'm sure they'll be on the ball as they are one of the most customer friendly companies I've dealt with over the building/flying time period. tailwinds jeff ________________________________ Message 15 ____________________________________ Time: 11:22:56 AM PST US From: Paul Mulwitz Subject: Re: Zenith-List: Re: Engines Hi Brandon, No, I don't have a specific reference on the supersonic prop tips. I wonder if your Texan tips are actually going supersonic or if they are just transonic. Do you get a sonic boom? There is a nice prop tip speed calculator on the Culver prop web site. You can plug in the RPM and prop diameter to get an estimate of the mach number for the tips. Of course, mach number varies a great deal with air conditions, but it still might be interesting to see. I am amused by the responses I am getting to a post I didn't think would be at all controversial. I was merely trying to help Robert understand the answer to his question of why some engines run at such high RPM. Your question about tips going over mach 1 was also mentioned by Roy while he strongly defended the ancestry of the Rotax engine design. I guess I am just an irritating guy . . . Paul At 09:00 AM 2/24/2007, you wrote: > > > >> As RPM increases, the speed of the propeller tip >also increases >>according to simple geometry. > >True. > > >> As the propeller tip approaches the speed of sound > > >>it becomes inefficient, > >True. > > >>and if allowed to hit the speed of sound it can be >destroyed. > >I would love to see your reference on this one. The >Texan I fly on weekends has the tips go supersonic >just about every flight. I haven't done the math, and >don't care to, but you can hear the difference when it >takes off. When I take off, I pull back the prop as >soon as I get the gear up, and it purrs by. Most of >our pilots leave the prop up until at altitude. The >sound is a high pitched whine. The difference in RPM >is only 100 - 200. You can often hear the same thing >on Bonanzas and others if the prop is left up. > >R/ > >Brandon >601 HDS / TD / Corvair >70 hours > > >Never miss an email again! >Yahoo! Toolbar alerts you the instant new Mail arrives. >http://tools.search.yahoo.com/toolbar/features/mail/ > --------------------------------------------- Paul Mulwitz 32013 NE Dial Road Camas, WA 98607 --------------------------------------------- ________________________________ Message 16 ____________________________________ Time: 11:35:54 AM PST US From: "Rich" <4rcsimmons@comcast.net> Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) I truly understand! The garage time is sacred and is a necessity for ones mental health!! Rich Do no archive ________________________________ Message 17 ____________________________________ Time: 11:42:12 AM PST US From: "Rich" <4rcsimmons@comcast.net> Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) I totally agree on the adjustable time line! As far as mistakes - I 've used this term before and need to again. I am soon to pay some "More Stupid Tax" for not comprehending what I am reading in the text / pictures / and drawings! This leads me to another question; does Zenith sell an interpreter? :-) Rich Murfreesboro, TN ________________________________ Message 18 ____________________________________ Time: 01:42:38 PM PST US From: "Bill Naumuk" Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) You grow wiser, grasshopper! Bill Naumuk HDS Fuselage Townville, Pa ----- Original Message ----- From: Rich To: zenith-list@matronics.com Sent: Saturday, February 24, 2007 2:38 PM Subject: Re: Zenith-List: 1st Hundred Hours of Building (XL) I totally agree on the adjustable time line! As far as mistakes - I 've used this term before and need to again. I am soon to pay some "More Stupid Tax" for not comprehending what I am reading in the text / pictures / and drawings! This leads me to another question; does Zenith sell an interpreter? J Rich Murfreesboro, TN ________________________________ Message 19 ____________________________________ Time: 04:56:36 PM PST US From: "n801bh@netzero.com" Subject: Re: Zenith-List: Re: Engines >>and if allowed to hit the speed of sound it can be destroyed. I would love to see your reference on this one. The Texan I fly on weekends has the tips go supersonic just about every flight. I haven't done the math, and don't care to, but you can hear the difference when it takes off. When I take off, I pull back the prop as soon as I get the gear up, and it purrs by. Most of our pilots leave the prop up until at altitude. The sound is a high pitched whine. The difference in RPM is only 100 - 200. You can often hear the same thing on Bonanzas and others if the prop is left up. R/ Brandon 601 HDS / TD / Corvair 70 hours I have had my prop at 1.2 mach. In fact it gets over mach everytime I fl y. 76" three blade inflight adjustable Ivo. 160+ hours and the tips look as good as the day I installed them. do not archive Ben Haas N801BH www.haaspowerair.com -- Brandon Tucker wrote: >> As RPM increases, the speed of the propeller tip also increases >>according to simple geometry. True. >> As the propeller tip approaches the speed of sound >>it becomes inefficient, True. >>and if allowed to hit the speed of sound it can be destroyed. I would love to see your reference on this one. The Texan I fly on weekends has the tips go supersonic just about every flight. I haven't done the math, and don't care to, but you can hear the difference when it takes off. When I take off, I pull back the prop as soon as I get the gear up, and it purrs by. Most of our pilots leave the prop up until at altitude. The sound is a high pitched whine. The difference in RPM is only 100 - 200. You can often hear the same thing on Bonanzas and others if the prop is left up. R/ Brandon 601 HDS / TD / Corvair 70 hours Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/ ======================== =========== ======================== =========== ======================== ===========


>>and if allowed to hit the& nbsp;speed of sound it can be
destroyed.

I would love to see your reference&nbs p;on this one.  The
Texan I fly on  weekends has the tips go supersonic
ju st about every flight.  I haven't don e the math, and
don't care to, but  ;you can hear the difference when it
ta kes off.  When I take off, I pul l back the prop as
soon as I get&n bsp;the gear up, and it purrs by. &nb sp;Most of
our pilots leave the prop up  until at altitude.  The
sound is  a high pitched whine.  The difference  ;in RPM
is only 100 - 200.  You&nb sp;can often hear the same thing
on Bon anzas and others if the prop is left& nbsp;up.  

R/

Brandon
601 HDS /&nbs p;TD / Corvair
70 hours

I have had my prop at 1.2 mach. In fact it gets over mach everytime I fly. 76" three blade inflight adjustable Ivo. 160+ hours and the t ips look as good as the day I installed them.

do not archive


Ben Haas
N801BH
www.haaspowerair .com

-- Brandon Tucker <btucke73@yahoo.com>& nbsp;wrote:
--> Zenith-List message posted by:  Brandon Tucker <btucke73@yahoo.com>



>> As RPM increases, the speed of&n bsp;the propeller tip
also increases >>acco rding to simple geometry.

True.

>>&nb sp; As the propeller tip approaches the&nb sp;speed of sound

>>it becomes ineffici ent, 

True.

>>and if allowed to& nbsp;hit the speed of sound it can be
destroyed.

I would love to see your& nbsp;reference on this one.  The
Texan  I fly on weekends has the tips go&nbs p;supersonic
just about every flight.  I&nbs p;haven't done the math, and
don't care  ;to, but you can hear the difference  when it
takes off.  When I take of f, I pull back the prop as
soon as  I get the gear up, and it purrs  by.  Most of
our pilots leave the  prop up until at altitude.  The
s ound is a high pitched whine.  The&nb sp;difference in RPM
is only 100 - 200.   You can often hear the same th ing
on Bonanzas and others if the prop& nbsp;is left up.  

R/

Brandon
601&n bsp;HDS / TD / Corvair
70 hours


& nbsp;
Never miss an email again!
Yahoo! T oolbar alerts you the instant new Mail&nbs p;arrives.
http://tools.search.yahoo.com/toolbar/features/mail/
________________________________ Message 20 ____________________________________ Time: 06:15:46 PM PST US From: "Noel Loveys" Subject: RE: Zenith-List: Engines I'm only going to tackle one question you asked. About the high RPM of the newer engines. Horsepower is a factor of many things a few of which are the displacement of the engine and the number of power pulses per minute. Increase the number of power pulses and you increase the horsepower. Of course there is a level of diminishing returns on this or we would all be driving cars with thimble size engines turning 5 million RPM. And producing 500 hp.. Older engines were designed for the props they would be turning. Those props were most efficient below 3000 RPM so the engines were designed to have a max RPM of below 3000. They increased their power by adding cubic inches. Basically bigger cylinders and more cylinders. Quite a few of the radial engines had planetary reduction gearing in the nose that allowed than to max out at around 5000. A few things to consider are the improvements in engineering and materials in the last seventy years. Newer bearings, cylinder walls and better cooling methods allow much higher revving engines. Noel > -----Original Message----- > From: owner-zenith-list-server@matronics.com > [mailto:owner-zenith-list-server@matronics.com] On Behalf Of > Robert Schoenberger > Sent: Friday, February 23, 2007 12:11 PM > To: zenith-list@matronics.com > Subject: Zenith-List: Engines > > > > > List . . . please be patient while I ask a bunch of probably dumb > questions re engines for my 701. I always thought I would > use a Rotax > 912 - 80 HP, but an awful lot of my buddies in my flying club > are down > on Rotax due to the continual AD's (is that the right word?). I also > see a lot of service notices in the EAA mags. This sort of > surprises me > since they have been around a long time, and one would think > the bumps > would be smoothed out. > > First dumb question - why do all of these engines for LSA and > ultralites > operate at such a high RPM, i.e. in the 5,000 RPM range? I > assume this > 5,000 RPM range has some sort of gearbox. What are typical > prop RPM's > at cruise? > > If I'm not mistaken the engines which powered the Aeronca, > Taylorcraft, > PIper Cub and the like were about 65 HP and were direct drive. Why > aren't such engines available for the 701, or are they? > Wouldn't these > be much quieter (I"m big on quiet)? Those old classic birds just > seemed to putt putt along. My Piper Dakota of some years ago > operated > in the 2,400 range. > > Has anyone tried a 60HP HKS in a 701? I've heard nothing but good > things about the HKS's. Are cowlings and FWF packages > available? I've > been impressed with the low 2 - 3 gph fuel consumption of these > engines. Would the 701 fly ok with 60 HP? It's my > understanding that > the 701 was originally designed for something like 55 HP, but > I may be > wrong about this. > > Any other thought you might have will be appreciated. Thank you. > Robert Schoenberger 701 60% > > > > > ________________________________ Message 21 ____________________________________ Time: 11:26:29 PM PST US Subject: Zenith-List: Re: Re: Engines From: BadBob I have had my prop at 1.2 mach. In fact it gets over mach everytime I fl y. 76" three blade inflight adjustable Ivo. 160+ hours and the tips look as good as the day I installed them. do not archive Ben Haas N801BH www.haaspowerair.com WOW!!! At 70 degrees F that is 3400rpm for Mach 1.0 and at Mach 1.2 that is around 4100rpm! I am surprised that the prop can take that! Bob from Oregon. :-) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith-list Browse Digests http://www.matronics.com/digest/zenith-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.