---------------------------------------------------------- Kitfox-List Digest Archive --- Total Messages Posted Thu 02/24/05: 18 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:10 AM - Re: SV: Pitch/prop-angle/rpm (Michel Verheughe) 2. 12:21 PM - Re: SV: Pitch/prop-angle/rpm (Lynn Matteson) 3. 01:53 PM - Re: SV: Pitch/prop-angle/rpm (Michel Verheughe) 4. 02:53 PM - NSI CAP (joakley@ida.net) 5. 03:05 PM - Re: NSI CAP (Ronald K. Stevens) 6. 03:08 PM - Re: SV: Pitch/prop-angle/rpm (Torgeir Mortensen) 7. 03:23 PM - Exterior LED lights. (Torgeir Mortensen) 8. 04:04 PM - Re: NSI CAP (joakley@ida.net) 9. 04:10 PM - Re: Exterior LED lights. (Randy Daughenbaugh) 10. 04:47 PM - Re: NSI CAP (Giovanni Day) 11. 06:49 PM - Re: SV: Pitch/prop-angle/rpm (Lynn Matteson) 12. 07:00 PM - Re: NSI CAP (Rick) 13. 07:16 PM - The engine chang is a big success!!! (David Savener) 14. 07:39 PM - Re: NSI CAP (Jimmie Blackwell) 15. 07:45 PM - Re: The engine chang is a big success!!! (Bruce Harrington) 16. 08:58 PM - Re: SV: Pitch/prop-angle/rpm (Guy Buchanan) 17. 08:58 PM - Re: SV: Pitch/prop-angle/rpm (Guy Buchanan) 18. 10:42 PM - Re: repairman's certificate (Michael Gibbs) ________________________________ Message 1 _____________________________________ Time: 11:10:06 AM PST US From: Michel Verheughe Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm --> Kitfox-List message posted by: Michel Verheughe Torgeir Mortensen wrote: > Here is a link to some stuff about propellers (EAA site): Thanks, Torgeir. A very interesting site. Yet, I am afraid I won't be able to convert directly pitch in inches to pitch in degrees. BTW, I checked what Jabiru Australia says and they recommend a 60 by 40 prop for the Kitfox 3. Strange that I go over the red line with a 60 by 38, then. I don't know. Maybe I have to fly a bit more to understand my new plane and engine configuration. Cheers, Michel do not archive ________________________________ Message 2 _____________________________________ Time: 12:21:25 PM PST US Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm From: Lynn Matteson --> Kitfox-List message posted by: Lynn Matteson Michel, if you go over the red line with a 38" pitch, I think that's why the 40 is recommended, isn't it?....loads down the engine so it can't turn as many rpm. Speaking strictly from radio-control modeling experience, if you're revving too much, you install a "higher gear" prop, one with a bigger pitch number....makes the engine work harder, and therefore won't rev as high. If you were to go to a really "steep" pitch, like a 50 or 60, the engine couldn't pull the plane that fast (you hope) so revs would be lower, wouldn't they? Somebody with more prop savvy than me will probably shoot down this idea, but it makes sense to me....or else I need a nap. : ) Lynn On Thursday, February 24, 2005, at 02:00 PM, Michel Verheughe wrote: > --> Kitfox-List message posted by: Michel Verheughe > > Torgeir Mortensen wrote: >> Here is a link to some stuff about propellers (EAA site): > > Thanks, Torgeir. A very interesting site. Yet, I am afraid I won't be > able to > convert directly pitch in inches to pitch in degrees. > BTW, I checked what Jabiru Australia says and they recommend a 60 by > 40 prop > for the Kitfox 3. Strange that I go over the red line with a 60 by 38, > then. I > don't know. Maybe I have to fly a bit more to understand my new plane > and > engine configuration. > > Cheers, > Michel > > do not archive > > ________________________________ Message 3 _____________________________________ Time: 01:53:40 PM PST US From: Michel Verheughe Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm --> Kitfox-List message posted by: Michel Verheughe Hello Lynn, Yes, the Jabiru site says a 40" pitch for the Kitfox 3. What you write also seems to make sense to me. But I am totally a novice in that field and I will also wait to hear what other people have to say about it. Cheers, Michel do not archive Lynn Matteson wrote: > > --> Kitfox-List message posted by: Lynn Matteson > > Michel, if you go over the red line with a 38" pitch, I think that's > why the 40 is recommended, isn't it?....loads down the engine so it > can't turn as many rpm. Speaking strictly from radio-control modeling > experience, if you're revving too much, you install a "higher gear" > prop, one with a bigger pitch number....makes the engine work harder, > and therefore won't rev as high. If you were to go to a really "steep" > pitch, like a 50 or 60, the engine couldn't pull the plane that fast > (you hope) so revs would be lower, wouldn't they? Somebody with more > prop savvy than me will probably shoot down this idea, but it makes > sense to me....or else I need a nap. : ) > > Lynn ________________________________ Message 4 _____________________________________ Time: 02:53:13 PM PST US Subject: Kitfox-List: NSI CAP From: joakley@ida.net --> Kitfox-List message posted by: joakley@ida.net Hi Kids, I am giving up on my cap from NSI. I have waited 4 months and I thought I was on a list for a new hub. I have tried to call (mail box full) tried to E mail, (no answer) tried fax last fall (no reply) I would like to fly, and have a problem with the notes and warnings. I did talk last fall to one of Lances people and was to be put on a list for new hubs and it was to be a month or so. can't aford several props laying around. some one may have a good deal if they follow through. \NSI 140 with gage, spinner ect..400 hours John Oakley ________________________________ Message 5 _____________________________________ Time: 03:05:15 PM PST US From: "Ronald K. Stevens" Subject: Re: Kitfox-List: NSI CAP --> Kitfox-List message posted by: "Ronald K. Stevens" John, What exactly is wrong with your CAP 140 hub? Ron Series 6 - NSI Turbo - Cap 140 joakley@ida.net wrote: >--> Kitfox-List message posted by: joakley@ida.net > >Hi Kids, >I am giving up on my cap from NSI. I have waited 4 months and I thought I >was on a list for a new hub. I have tried to call (mail box full) tried to >E mail, (no answer) tried fax last fall (no reply) I would like to fly, >and have a problem with the notes and warnings. I did talk last fall to >one of Lances people and was to be put on a list for new hubs and it was >to be a month or so. can't aford several props laying around. some one may >have a good deal if they follow through. >\NSI 140 with gage, spinner ect..400 hours > >John Oakley > > > > ________________________________ Message 6 _____________________________________ Time: 03:08:02 PM PST US Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm From: Torgeir Mortensen --> Kitfox-List message posted by: Torgeir Mortensen Hi Michel, Kind of strange this, but I'll think it's time to check your airspeed indicator -there might be an error in here some place(?). Let me explain; Morten, your friend with a model 4 have made some very nice protocol (tables) of his experience with different types of propellers. (For those interested, here is a direct link to this table: http://www.jabiru.no/PropTest.htm ) With reference to this table, the speed you experienced did not match very well with Mortens test. The model 4 is quite "cleaner" than a model III (and model II as I have). The drag created by our undercambered "high lift profile" (model I, II and III) is a lot higher than the newer profile wing has. Try a two way path with your GPS, the two way is better (easier) to handle, do this test in calm air to verify your AS indicator. I've yet to see an airspeed indicator without error. When my original AS indicator show redline, the actual speed is only 87 Mph. Quit a difference, isnt it? Also, we do not often check our speed at the red line, do we ? Also my indicator is fairly good at speeds below 80 Mph. Then about the recommendation from Jabiru. As you cant get the recommended RPM, cause you overrun the red line, well to increase the RPM you'll need finer pitch, right? We'll need to solve our RPM recommendation first-, so less pitch more RPM. But first, make a good test to verify that your airspeed indicator is right in the upper region, most important. Of course, -here's another propeller reading, this time from the EAA site: http://members.eaa.org/home/homebuilders/authors/bingelis/The%20Fixed%20Pitch%20Propellor%20Dillemma.html In this site (just roll a little down), You'll find a the practical thing we would like to know when selecting a propeller. Also, have a look at the "propeller estimator", in figure 3, a graph. with the relation of "RPM - SPEED - PITCH", this assuming no slippage. Try your number into this table, -amazing isn't it? (Use your read line 100 Mph as anchor point, let a straight line be anchored in this point. As you rotate the line, you'll find a rough estimate for RPM / pitch relation.) OK, let's make a quick calculation of your prop.: 60 X 38 We are using the formula: S=2*pi*r*0.75 I'll explain a little. The circumference (a point located 75 percent out from the blade root) is represented by: r*2 is the propeller diameter, we multiply with 0.75 to find the "normal pitch" point. This circumference line represent the hypotenuse for the triangular calculation, we name it "S". The withstanding cathetus (our pitch in inches), for our angle (say) alpha, is our pitch in degrees. We have, P=38" and our propeller diameter is 60". I.E. 2*r=60" Using the formula for S; S=60*pi*0.75=60*3.14*0.75=141.47 (inches, the hypotenuse) Further, we find sin for "alpha"(our pitch angle): Sin(alpha)=P/S=38/141.37=0.2688 The angle is then: lg sin "alpha"=0.2688 I.E. "alpha", our pitch angle is 15.59 deg ~ 15.6 deg. This is the bare calculation without slip. Hope this clear up. Cheers Torgeir. On Thu, 24 Feb 2005 20:00:14 +0100, Michel Verheughe wrote: > --> Kitfox-List message posted by: Michel Verheughe > > Torgeir Mortensen wrote: >> Here is a link to some stuff about propellers (EAA site): > > Thanks, Torgeir. A very interesting site. Yet, I am afraid I won't be > able to > convert directly pitch in inches to pitch in degrees. > BTW, I checked what Jabiru Australia says and they recommend a 60 by 40 > prop > for the Kitfox 3. Strange that I go over the red line with a 60 by 38, > then. I > don't know. Maybe I have to fly a bit more to understand my new plane and > engine configuration. > > Cheers, > Michel > > do not archive > > -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ ________________________________ Message 7 _____________________________________ Time: 03:23:09 PM PST US Subject: Kitfox-List: Exterior LED lights. From: Torgeir Mortensen --> Kitfox-List message posted by: Torgeir Mortensen Hi Folks, Thought you'll like to know about latest high intensity LEDs now in the marked. Here is a link to EAA ch. 724 meeting and events. Read the article about Using Alternative Sources for Nav and Strobe Lights By Scott Gettings, EAA 724. This one is a good one for us "experimental" builders / pilots. Here is the link: http://www.eaa724.org/MeetingsEvents.html (may take some time load, but is worth all (if any) delay). Enjoy, Torgeir. -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ ________________________________ Message 8 _____________________________________ Time: 04:04:07 PM PST US Subject: Re: Kitfox-List: NSI CAP From: joakley@ida.net --> Kitfox-List message posted by: joakley@ida.net Ron, there was a note put out last fall limiting type one hubs to 500 hours on the 912 ul and grounding all 912s with the type 1 hub there is a type 3 hub in the works, that Lance had said was going to raise time to 1500 hours. I would love to up date but also need to fly not set. Ther was quite a thread this winter untill we were told an update was on its way. this also calmed me untill now. the price had been set at 500 dollars. a cheep fix if it was going to really lengthen time.Its is not actually the hub but the blade attachment with the bearings on it. John > --> Kitfox-List message posted by: "Ronald K. Stevens" > > > John, > > What exactly is wrong with your CAP 140 hub? > > Ron > Series 6 - NSI Turbo - Cap 140 > > joakley@ida.net wrote: > >>--> Kitfox-List message posted by: joakley@ida.net >> >>Hi Kids, >>I am giving up on my cap from NSI. I have waited 4 months and I thought I >>was on a list for a new hub. I have tried to call (mail box full) tried >> to >>E mail, (no answer) tried fax last fall (no reply) I would like to fly, >>and have a problem with the notes and warnings. I did talk last fall to >>one of Lances people and was to be put on a list for new hubs and it was >>to be a month or so. can't aford several props laying around. some one >> may >>have a good deal if they follow through. >>\NSI 140 with gage, spinner ect..400 hours >> >>John Oakley >> >> >> >> > > ________________________________ Message 9 _____________________________________ Time: 04:10:54 PM PST US From: "Randy Daughenbaugh" Subject: RE: Kitfox-List: Exterior LED lights. --> Kitfox-List message posted by: "Randy Daughenbaugh" Thanks much Torgeir. I have been waiting to put lights on my plane until LEDs got good enough to do the job. I was worrying about cost and overtaxing my 912S power supply. It looks like maybe the time has come to start planning for lights. Randy . -----Original Message----- From: owner-kitfox-list-server@matronics.com [mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Torgeir Mortensen Subject: Kitfox-List: Exterior LED lights. --> Kitfox-List message posted by: Torgeir Mortensen Hi Folks, Thought you'll like to know about latest high intensity LEDs now in the marked. Here is a link to EAA ch. 724 meeting and events. Read the article about Using Alternative Sources for Nav and Strobe Lights By Scott Gettings, EAA 724. This one is a good one for us "experimental" builders / pilots. Here is the link: http://www.eaa724.org/MeetingsEvents.html (may take some time load, but is worth all (if any) delay). Enjoy, Torgeir. -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ ________________________________ Message 10 ____________________________________ Time: 04:47:13 PM PST US From: "Giovanni Day" Subject: RE: Kitfox-List: NSI CAP --> Kitfox-List message posted by: "Giovanni Day" I had a chance to buy one of these for $800.00 and decided against it. I called NSI several times a day for a week and got not answer and not reply to messages left. I do not want an orphaned produce and it is not looking like there will be any service from these guys. Giovanni Day Do Not Archive -----Original Message----- From: owner-kitfox-list-server@matronics.com [mailto:owner-kitfox-list-server@matronics.com]On Behalf Of joakley@ida.net Subject: Re: Kitfox-List: NSI CAP --> Kitfox-List message posted by: joakley@ida.net Ron, there was a note put out last fall limiting type one hubs to 500 hours on the 912 ul and grounding all 912s with the type 1 hub there is a type 3 hub in the works, that Lance had said was going to raise time to 1500 hours. I would love to up date but also need to fly not set. Ther was quite a thread this winter untill we were told an update was on its way. this also calmed me untill now. the price had been set at 500 dollars. a cheep fix if it was going to really lengthen time.Its is not actually the hub but the blade attachment with the bearings on it. John > --> Kitfox-List message posted by: "Ronald K. Stevens" > > > John, > > What exactly is wrong with your CAP 140 hub? > > Ron > Series 6 - NSI Turbo - Cap 140 > > joakley@ida.net wrote: > >>--> Kitfox-List message posted by: joakley@ida.net >> >>Hi Kids, >>I am giving up on my cap from NSI. I have waited 4 months and I thought I >>was on a list for a new hub. I have tried to call (mail box full) tried >> to >>E mail, (no answer) tried fax last fall (no reply) I would like to fly, >>and have a problem with the notes and warnings. I did talk last fall to >>one of Lances people and was to be put on a list for new hubs and it was >>to be a month or so. can't aford several props laying around. some one >> may >>have a good deal if they follow through. >>\NSI 140 with gage, spinner ect..400 hours >> >>John Oakley >> >> >> >> > > ________________________________ Message 11 ____________________________________ Time: 06:49:01 PM PST US Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm From: Lynn Matteson --> Kitfox-List message posted by: Lynn Matteson Oops....my mistake, Michel...I thought when you said you hit red line, you were talking about the tachometer....engine revolutions red line. It seems after reading Torgeir's message below, that your problem is overspeeding the aircraft's red line or Vne. If this is the case, then my comments earlier about going to a 40 pitch over your present 38, was wrong. Guess I should have kept my mouth shut. Hey Don, I see what you mean. : ) Lynn On Thursday, February 24, 2005, at 06:11 PM, Torgeir Mortensen wrote: > --> Kitfox-List message posted by: Torgeir Mortensen > > > Then about the recommendation from Jabiru. As you cant get the > recommended > RPM, cause you overrun the red line, well to increase the RPM you'll > need > finer pitch, right? ________________________________ Message 12 ____________________________________ Time: 07:00:57 PM PST US From: "Rick" Subject: RE: Kitfox-List: NSI CAP --> Kitfox-List message posted by: "Rick" They are a small company that produces outstanding products. There hours are Monday through Thursday 8 to 5. Lunch 1200 to 1:00 or 1:30. If you call on a Monday, bad day, Thursday bad day. They don't have a staff just to answer phones, usually just one over worked person. I have had both good and bad luck calling and getting through. But I look at it this way. When I do get through the quality of information is on par with the products they make. I never feel rushed or unimportant. I am the one who usually has to let them get back to work. I have even had Lance out of breath from running from the dyno to talk to me...dyno still running. Call Dell computer company some time and see what you get. Rick -----Original Message----- From: owner-kitfox-list-server@matronics.com [mailto:owner-kitfox-list-server@matronics.com]On Behalf Of Giovanni Day Subject: RE: Kitfox-List: NSI CAP --> Kitfox-List message posted by: "Giovanni Day" I had a chance to buy one of these for $800.00 and decided against it. I called NSI several times a day for a week and got not answer and not reply to messages left. I do not want an orphaned produce and it is not looking like there will be any service from these guys. Giovanni Day Do Not Archive -----Original Message----- From: owner-kitfox-list-server@matronics.com [mailto:owner-kitfox-list-server@matronics.com]On Behalf Of joakley@ida.net Subject: Re: Kitfox-List: NSI CAP --> Kitfox-List message posted by: joakley@ida.net Ron, there was a note put out last fall limiting type one hubs to 500 hours on the 912 ul and grounding all 912s with the type 1 hub there is a type 3 hub in the works, that Lance had said was going to raise time to 1500 hours. I would love to up date but also need to fly not set. Ther was quite a thread this winter untill we were told an update was on its way. this also calmed me untill now. the price had been set at 500 dollars. a cheep fix if it was going to really lengthen time.Its is not actually the hub but the blade attachment with the bearings on it. John > --> Kitfox-List message posted by: "Ronald K. Stevens" > > > John, > > What exactly is wrong with your CAP 140 hub? > > Ron > Series 6 - NSI Turbo - Cap 140 > > joakley@ida.net wrote: > >>--> Kitfox-List message posted by: joakley@ida.net >> >>Hi Kids, >>I am giving up on my cap from NSI. I have waited 4 months and I thought I >>was on a list for a new hub. I have tried to call (mail box full) tried >> to >>E mail, (no answer) tried fax last fall (no reply) I would like to fly, >>and have a problem with the notes and warnings. I did talk last fall to >>one of Lances people and was to be put on a list for new hubs and it was >>to be a month or so. can't aford several props laying around. some one >> may >>have a good deal if they follow through. >>\NSI 140 with gage, spinner ect..400 hours >> >>John Oakley >> >> >> >> > > ________________________________ Message 13 ____________________________________ Time: 07:16:29 PM PST US From: "David Savener" Subject: Kitfox-List: The engine chang is a big success!!! Seal-Send-Time: Thu, 24 Feb 2005 21:14:56 -0600 --> Kitfox-List message posted by: "David Savener" Thanks list, for all the help. I have finished changing my 532 and B gearbox in my Model II for a 582 with C gearbox. It is great. Dual ignition is great for confidence as is the oil injection. I had to set prop pitch at 18 degrees to get 6200 Static RPM. It leaps off the ground now. I am running a CPS clutch. It starts at the touch of the starter. Idles well at 2000 RPM although the rpm varies up and down 250 RPM while it warms up. Coolant temp runs around 165 degrees. Seems just right. EGTs are running about 1075 at 5800 RPM in level flight. It flies about 83 mph at 5800 rpm. Before the change it indicated about 70 mph at that rpm(prop was not pitched correctly). Here's the catch. At cruise airspeed I now have to hold left-forward stick. Quite a bit of left aileron to keep it from rolling right and it will climb quickly if I don't hold down elevator. Is this from the increased airspeed and additional power being delivered by a properly adjusted prop?? The ball seems to be centered. I re-weighed the airplane and my CG seems to be just right. I am considering my options as to re-rigging to get rid of the stick pressures at cruise. Any suggestions?? Thanks Dave S ________________________________ Message 14 ____________________________________ Time: 07:39:37 PM PST US From: "Jimmie Blackwell" Subject: Re: Kitfox-List: NSI CAP --> Kitfox-List message posted by: "Jimmie Blackwell" I continue to be amazed at NSI. A friend of mine has been trying to get his gauge repaired for his NSI CAP on an in flight adjustable prop for about two years. From what I have observed this list is being far to kind to Lance. He ain't taking care of his customers. Incidentally, I encourage you to call Dell. You will always get someone to help you. Jimmie ----- Original Message ----- From: "Rick" Subject: RE: Kitfox-List: NSI CAP > --> Kitfox-List message posted by: "Rick" > > They are a small company that produces outstanding products. There hours are > Monday through Thursday 8 to 5. Lunch 1200 to 1:00 or 1:30. If you call on a > Monday, bad day, Thursday bad day. They don't have a staff just to answer > phones, usually just one over worked person. I have had both good and bad > luck calling and getting through. But I look at it this way. When I do get > through the quality of information is on par with the products they make. I > never feel rushed or unimportant. I am the one who usually has to let them > get back to work. I have even had Lance out of breath from running from the > dyno to talk to me...dyno still running. Call Dell computer company some > time and see what you get. > > Rick > > -----Original Message----- > From: owner-kitfox-list-server@matronics.com > [mailto:owner-kitfox-list-server@matronics.com]On Behalf Of Giovanni Day > To: kitfox-list@matronics.com > Subject: RE: Kitfox-List: NSI CAP > > > --> Kitfox-List message posted by: "Giovanni Day" > > I had a chance to buy one of these for $800.00 and decided against it. I > called NSI several times a day for a week and got not answer and not reply > to messages left. I do not want an orphaned produce and it is not looking > like there will be any service from these guys. > > Giovanni Day > > Do Not Archive > > -----Original Message----- > From: owner-kitfox-list-server@matronics.com > [mailto:owner-kitfox-list-server@matronics.com]On Behalf Of > joakley@ida.net > To: kitfox-list@matronics.com > Subject: Re: Kitfox-List: NSI CAP > > > --> Kitfox-List message posted by: joakley@ida.net > > Ron, > there was a note put out last fall limiting type one hubs to 500 hours on > the 912 ul and grounding all 912s with the type 1 hub there is a type 3 > hub in the works, that Lance had said was going to raise time to 1500 > hours. I would love to up date but also need to fly not set. Ther was > quite a thread this winter untill we were told an update was on its way. > this also calmed me untill now. the price had been set at 500 dollars. a > cheep fix if it was going to really lengthen time.Its is not actually the > hub but the blade attachment with the bearings on it. > > John > > > --> Kitfox-List message posted by: "Ronald K. Stevens" > > > > > > John, > > > > What exactly is wrong with your CAP 140 hub? > > > > Ron > > Series 6 - NSI Turbo - Cap 140 > > > > joakley@ida.net wrote: > > > >>--> Kitfox-List message posted by: joakley@ida.net > >> > >>Hi Kids, > >>I am giving up on my cap from NSI. I have waited 4 months and I thought I > >>was on a list for a new hub. I have tried to call (mail box full) tried > >> to > >>E mail, (no answer) tried fax last fall (no reply) I would like to fly, > >>and have a problem with the notes and warnings. I did talk last fall to > >>one of Lances people and was to be put on a list for new hubs and it was > >>to be a month or so. can't aford several props laying around. some one > >> may > >>have a good deal if they follow through. > >>\NSI 140 with gage, spinner ect..400 hours > >> > >>John Oakley > >> > >> > >> > >> > > > > > > ________________________________ Message 15 ____________________________________ Time: 07:45:24 PM PST US From: "Bruce Harrington" Subject: Re: Kitfox-List: The engine chang is a big success!!! --> Kitfox-List message posted by: "Bruce Harrington" Hi Dave, Congrats on the upgrade to 582. Are you using the flaperons to trim for pitch? If not, then you should be. If you have an adjustment on the front of your H. stab, maybe raise it up one hole to reduce incidence. For the right roll, can you adjust the lift strut wing attach rod end(s)? Right wing LE needs to go up, left wing LE down. Have fun, bh Ex-582ed IV-1200, N194KF, 800+ hrs > Here's the catch. At cruise airspeed I now have to hold left-forward > stick. Quite a bit of left aileron to keep it from rolling right and it > will climb quickly if I don't hold down elevator. Is this from the > increased airspeed and additional power being delivered by a properly > adjusted prop?? The ball seems to be centered. > > I re-weighed the airplane and my CG seems to be just right. > > I am considering my options as to re-rigging to get rid of the stick > pressures at cruise. Any suggestions?? > > Thanks > Dave S ________________________________ Message 16 ____________________________________ Time: 08:58:26 PM PST US From: Guy Buchanan Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm --> Kitfox-List message posted by: Guy Buchanan At 08:00 PM 2/24/2005 +0100, you wrote: >--> Kitfox-List message posted by: Michel Verheughe > >Torgeir Mortensen wrote: > > Here is a link to some stuff about propellers (EAA site): > >Thanks, Torgeir. A very interesting site. Yet, I am afraid I won't be able to >convert directly pitch in inches to pitch in degrees. Why is that? Guy Buchanan K-IV 1200 / 582 / 99% done, thanks to Bob Ducar. Do not archive ________________________________ Message 17 ____________________________________ Time: 08:58:26 PM PST US From: Guy Buchanan Subject: Re: SV: Kitfox-List: Pitch/prop-angle/rpm --> Kitfox-List message posted by: Guy Buchanan At 03:12 PM 2/24/2005 -0500, you wrote: >--> Kitfox-List message posted by: Lynn Matteson > >Michel, if you go over the red line with a 38" pitch, I think that's >why the 40 is recommended, isn't it?....loads down the engine so it >can't turn as many rpm. Speaking strictly from radio-control modeling >experience, if you're revving too much, you install a "higher gear" >prop, one with a bigger pitch number....makes the engine work harder, >and therefore won't rev as high. If you were to go to a really "steep" >pitch, like a 50 or 60, the engine couldn't pull the plane that fast >(you hope) so revs would be lower, wouldn't they? Somebody with more >prop savvy than me will probably shoot down this idea, but it makes >sense to me....or else I need a nap. : ) Well that's the way it works on a CS prop. To lower RPM you add pitch. Guy Buchanan K-IV 1200 / 582 / 99% done, thanks to Bob Ducar. Do not archive ________________________________ Message 18 ____________________________________ Time: 10:42:22 PM PST US From: Michael Gibbs Subject: Re: Kitfox-List: repairman's certificate --> Kitfox-List message posted by: Michael Gibbs John sez: >I thought the whole purpose of the 51% rule was to insure that the builder >was personally and intimately familiar with the aircraft enough to be issued a >repairman's certificate for that aircraft. The 51% rule is about the airplane, not the mechanic. It is there to ensure that the factory is selling airplane kits, not airplanes. Airplanes have to be certified, but if the factory builds less than (or equal to) 49%, it's a kit. Remember that A&P mechanics are not required to have built, or even repaired, one of each type of airplane they are authorized to work on. Mike G. N728KF