KR>elevator balance!
HI guys thanks for the feed back! I have just asked the questions to get some oppions of other builders as I am no engineer and really want to fly and safely. I have been told by different fellows that elevator balancing is needed and have emphasised the need with more power but yes flutter can happen at any speed and I have seen some kr's that are flying with no balancing I am putting in a more powerful engine and have been told that flutter could be a problem at higher speeds that is why I have asked about the subject as I want to fly for a long time not a short stint. My plane had been built straight to the plans and was going to have an 0200 but they are quite a dear engine to get and overhaul so I looked around and got a little more power but I was told to by the previous builder balance that elevator before u fly it! I am going to balance it for piece of mind! I am going to use a piece of chromolly on each side of the elevator and attach it to the elevator. How have other's done it that are flying I am looking to have mine looking like marty roberts plane how did he do it. I don't have his email address and would love to talk to him about how he did his! cheers Ross _ What's your house worth? Click here to find out: http://www.ninemsn.realestate.com.au
KR>elevator balance!
How have other's done it that are flying I am looking to have mine >looking like marty roberts plane how did he do it. I don't have his email >address and would love to talk to him about how he did his! >cheers >Ross +++ Marty Roberts would be very hard to get in touch with but I'd give you ten to one odds that Dan Diehl would know and you could reach him almost any time at Diehl Aeronautical. Larry Flesner
KR>Elevator balance
How critical is it to make sure both ends of an elevator is balanced evenly. Mean one side of the balance being heavier than the other but still 100% balanced elevator. Justin
KR>Elevator balance
That means your elevator will fall off if you go fast. Ron Freiberger mailto: rfreiber...@swfla.rr.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of JW Sent: Saturday, March 20, 2004 8:03 PM To: KRnet Subject: KR>Elevator balance How critical is it to make sure both ends of an elevator is balanced evenly. Mean one side of the balance being heavier than the other but still 100% balanced elevator. Justin ___ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Elevator balance
At 07:02 PM 3/20/04 -0600, you wrote: >How critical is it to make sure both ends of an elevator is balanced evenly. Mean one side of the balance being heavier than the other but still 100% balanced elevator. >Justin Justin, What are we talking here, ounces? If it's close there probably would not be a problem. Ounces would probably not be enough to induce any twisting into the control surface under air loads. Try giving a bit more detail and maybe one of the engineer types will venture an answer. Larry Flesner
KR> Elevator balance
Larry, I am going to be intentionally vague. The spiral slipstream of the prop is adjusted for statically by angling the engine and later dynamically by rudder control. Design adjustments can be made to reduce this effect when designing the vertical stabilizer. There are similar adjustments that can be made during the design and test stage of the elevator thru GVT ground vibration testing. Thats why we follow the plans on this one. Joe I can hear it now! - Original Message - From: "larry flesner" To: "KRnet" Sent: Sunday, March 21, 2004 5:36 AM Subject: KR> Elevator balance > At 07:02 PM 3/20/04 -0600, you wrote: > >How critical is it to make sure both ends of an elevator is balanced > evenly. Mean one side of the balance being heavier than the other but still > 100% balanced elevator. > >Justin > > > Justin, > > What are we talking here, ounces? If it's close there probably would > not be a problem. Ounces would probably not be enough to induce > any twisting into the control surface under air loads. > > Try giving a bit more detail and maybe one of the engineer types > will venture an answer. > > Larry Flesner > > > > ___ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> Elevator balance?
>Larry, > I am going to be intentionally vague. >The spiral slipstream of the prop is adjusted for statically by angling the >engine and later dynamically by rudder control. Design adjustments can be >made to reduce this >effect when designing the vertical stabilizer. > There are similar adjustments that can be made during >the design and test stage of the elevator thru GVT >ground vibration testing. Thats why we follow the plans >on this one. Joe >I can hear it now! Joe, You maybe ment this for Justin? He was asking the question about elevator balance being distributed evenly across the span. Please enlighten as to how your answer relates. As to propeller spirial slipstream, I built my KR with "zero - zero" thrust alignment and the vertical and horizontal stabs both set to "zero" alignment and it flys just fine. The greatest effect I've ever noted on propeller spirial slipstream is that one side of the airplane gets dirtier than the other on a grass strip. :-) Larry Flesner
KR> Elevator balance?
Sorry about the mixup I'm going to add the grass strip comment to my best comment book. Thanks Joe Ps. Do you have a taildragger? - Original Message - From: "larry flesner" To: "KRnet" Sent: Sunday, March 21, 2004 12:29 PM Subject: KR> Elevator balance? > >Larry, > > I am going to be intentionally vague. > >The spiral slipstream of the prop is adjusted for statically by angling the > >engine and later dynamically by rudder control. Design adjustments can be > >made to reduce this > >effect when designing the vertical stabilizer. > > There are similar adjustments that can be made during > >the design and test stage of the elevator thru GVT > >ground vibration testing. Thats why we follow the plans > >on this one. Joe > >I can hear it now! > > > Joe, > > You maybe ment this for Justin? He was asking the question about > elevator balance being distributed evenly across the span. Please > enlighten as to how your answer relates. > > As to propeller spirial slipstream, I built my KR with "zero - zero" > thrust alignment and the vertical and horizontal stabs both set > to "zero" alignment and it flys just fine. > > The greatest effect I've ever noted on propeller spirial slipstream > is that one side of the airplane gets dirtier than the other on > a grass strip. :-) > > Larry Flesner > > > > > > ___ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR>Elevator balance amount
I did the elevator counter balance today with the elevator being the "Horn " style ( Richard Mole design ) with the naca 63009 airfoil. With the weight in the horns it took a total of 28 ounces of lead in 4 peices of conduit. Maybe 29 OZ in all. Anyone else know the weight required for their counter balance? I was wondering where I sat for weight comparison. Also this HS is almost 8 feet wide. Now with the weight in the horns there is no worry of a bracket breaking under G loads. The horns are well wrapped with carbon and I plan on wraping some light deck cloth around the wood rib on the outside as there is room. This will also make up for the extra weight of paint on the larger rear side of the elevator. Steve McGee Endeavor Wi. USA Building a KR2S widened. lmc...@maqs.net
KR>Elevator balance amount
I did not counterbalance my elevator as per the plans. These airplanes are usually tail heavy as opposed to nose heavy with today's over weight pilots. That being saidputting almost 2 lbs of lead that far to the rear will have a more dramatic effect on the cg than you may think. Use caution. If you are hanging a corvair upfront then I wouldn't worry about it. On Sat, 13 Mar 2004 18:05:44 -0600 "Steve and Lori McGee" writes: > I did the elevator counter balance today with the elevator being > the "Horn " style ( Richard Mole design ) with the naca 63009 > airfoil. > With the weight in the horns it took a total of 28 ounces of lead in > 4 peices of conduit. Maybe 29 OZ in all. Anyone else know the > weight required for their counter balance? I was wondering where I > sat for weight comparison. Also this HS is almost 8 feet wide. >Now with the weight in the horns there is no worry of a bracket > breaking under G loads. The horns are well wrapped with carbon and > I plan on wraping some light deck cloth around the wood rib on the > outside as there is room. This will also make up for the extra > weight of paint on the larger rear side of the elevator. > > Steve McGee > Endeavor Wi. USA > Building a KR2S widened. > lmc...@maqs.net > > > > ___ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > The best thing to hit the Internet in years - Juno SpeedBand! Surf the Web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!
