[RCSE] Gyro's for all
If I understand gyros correctly I would like all the flyers to use them, except me of course. It should enable a TD plane to fly right through a thermal and due to the gyro resisting change, give no indication of it at all. Yes? No? Maybe? J S. wrote: I am curious, do you mean in contests? This doesn't seem like it would be legal. Is there a rule about having a plane equipped with a gyro? To me it seems to take all the talent and challenge out of td flying. Any comments? From: B R [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [RCSE] Poly angle...Gyro's Date: Sat, 20 Jan 2001 15:28:31 -0800 (PST) Interesting article about Gyro's. Dose anyone use Gyro's for there t/d planes? If so I would like to know everything about you success or failure. Dose it aid in landing, and coring thermals? --- Blaine Deborah Beron-Rawdon [EMAIL PROTECTED] wrote: In Soaring 2161, Dave Seay asked "Is there any science in determining the angle of the poly break and/or its location out from center?" Well, it may not be science, but there is some engineering involved! To summarize, the amount of dihedral (or polyhedral) that a rudder and elevator (no ailerons) sailplane has is a major factor in its roll responsiveness and maximum roll rate, and strongly influences spiral stability. More dihedral increases roll responsiveness, roll rate and spiral stability. Airplanes with more dihedral also require larger vertical stabilizers. The exact arrangement of the dihedral, whether it is two-panel dihedral or a six-panel polyhedral for instance, is less important than the effective amount of dihedral that the arrangement provides. The effective dihedral of any arrangement can be estimated and is commonly referred to as "equivalent dihedral angle" (EDA). For what it is worth, I recommend at least 12 degrees of EDA for most rudder and elevator sailplanes. The arrangement of the panels is a compromise between efficiency while thermalling, efficiency in a rolling maneuver, and stall characteristics while thermalling. In short, arrangements that resemble a parabolic dihedral distribution provide a smooth and efficient lift distribution across the span while thermalling, and avoid large variations in lift coefficient across the span in a steady-state roll maneuver. This is good. Arrangements that have at lot of dihedral concentrated in the outer panels will tend to tip stall prematurely while thermalling. Equivalent dihedral angle is explained at: http://www.rc-soar.com/tech/spiral_eda.htm Envision Design sells software called "Plane Geometry" that enables easy experimentation with dihedral arrangements. Check out: http://members.home.net/evdesign/pages/plane_geometry.html That's all for now. Blaine Beron-Rawdon Envision Design San Pedro, California http://members.home.net/evdesign/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Re: Goop Adhesive Technique
Robert Buxton asks: Picking the lists brains for the best way to use GOOP adhesive to plant two JR241 servos in the fuselage of a Carbon D-Lite**... I've tried using masking tape between the servo and the glue, with poor results. The tape seems to split in half along its thickness after a while, resulting first in some funny changes in trim and control throw, followed the servo coming loose completely. Yes, it was a good brand of mnasking tape, but maybe not the same as what other people have used. What works for me is shrink tubing, like what's used to wrap battery packs. Just shrink a ring of it around the servo (make sure it wraps a little bit around the corners to guarantee that the servo can't slip out the end), scuff the surface a little with some medium sandpaper, then Goop or C/A the outer surface of the shrink tubing to the fuselage. If you ever need to remove the servo, slit the shrink tubing. Once the servo is safely out, it's fairly easy to peel the shrink tubing and glue residue out, then just use a new piece of shrink tubing to install the new servo. Don Stackhouse @ DJ Aerotech [EMAIL PROTECTED] http://www.djaerotech.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Mylar
The mylar is spoken for. Thanks to those who were interested and wrote. Bill -- Only motorcycle riders understand why dogs love to stick their heads out of car windows. Bill Johns Pullman, WA .. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Gyro's for all
Did you even bother reading the article, or are you just one of those old flyers like an old dog who can't be taught new tricks or new technology? let me guess, you probably don't even have a cordless phone yet, right? --- Rick Brown and Jill Wiest [EMAIL PROTECTED] wrote: If I understand gyros correctly I would like all the flyers to use them, except me of course. It should enable a TD plane to fly right through a thermal and due to the gyro resisting change, give no indication of it at all. Yes? No? Maybe? J S. wrote: I am curious, do you mean in contests? This doesn't seem like it would be legal. Is there a rule about having a plane equipped with a gyro? To me it seems to take all the talent and challenge out of td flying. Any comments? From: B R [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [RCSE] Poly angle...Gyro's Date: Sat, 20 Jan 2001 15:28:31 -0800 (PST) Interesting article about Gyro's. Dose anyone use Gyro's for there t/d planes? If so I would like to know everything about you success or failure. Dose it aid in landing, and coring thermals? --- Blaine Deborah Beron-Rawdon [EMAIL PROTECTED] wrote: In Soaring 2161, Dave Seay asked "Is there any science in determining the angle of the poly break and/or its location out from center?" Well, it may not be science, but there is some engineering involved! To summarize, the amount of dihedral (or polyhedral) that a rudder and elevator (no ailerons) sailplane has is a major factor in its roll responsiveness and maximum roll rate, and strongly influences spiral stability. More dihedral increases roll responsiveness, roll rate and spiral stability. Airplanes with more dihedral also require larger vertical stabilizers. The exact arrangement of the dihedral, whether it is two-panel dihedral or a six-panel polyhedral for instance, is less important than the effective amount of dihedral that the arrangement provides. The effective dihedral of any arrangement can be estimated and is commonly referred to as "equivalent dihedral angle" (EDA). For what it is worth, I recommend at least 12 degrees of EDA for most rudder and elevator sailplanes. The arrangement of the panels is a compromise between efficiency while thermalling, efficiency in a rolling maneuver, and stall characteristics while thermalling. In short, arrangements that resemble a parabolic dihedral distribution provide a smooth and efficient lift distribution across the span while thermalling, and avoid large variations in lift coefficient across the span in a steady-state roll maneuver. This is good. Arrangements that have at lot of dihedral concentrated in the outer panels will tend to tip stall prematurely while thermalling. Equivalent dihedral angle is explained at: http://www.rc-soar.com/tech/spiral_eda.htm Envision Design sells software called "Plane Geometry" that enables easy experimentation with dihedral arrangements. Check out: http://members.home.net/evdesign/pages/plane_geometry.html That's all for now. Blaine Beron-Rawdon Envision Design San Pedro, California http://members.home.net/evdesign/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] IMS - AMA Show Report
To begin, if the AMA advertised that you get a buck or so off if you show a current AMA card - I missed it, so bring your card. IMS seems to be gone as a designation, its now the AMA show, whoopee. I couldn't find an exhibitor listing, evidently they passed them out the first day, people saw them, but nobody could lay their hands on one so I don't have a booth count. Off the top of my head, the exhibitors are divided about 40% hobby suppliers - batteries, glue, radios, balsa, composite stuff, etc. The remainder is about 30%-30% power and sailplane. The USA F3B team was there, go say hello to Joe and Daryl and buy a tee shirt. I didn't see anything that stopped me in my tracks, but the Pasadena Convention Center was pretty full and I have a limited tolerance for crowds. I did get to play with the Multiplex flight simulator flying a pattern plane. I've never flown a real pattern plane and it was fun. Crashed several times, once in a tree and the other as I was doing some wonderful manuver that just happened to be straight down! I told the kid I handed the transmitter to: "that was the ground." I thought he'd find that helpful. One of the vendors showed videos of the large power acrobatic models that I'd only seen in magazines and never saw fly in the flesh. The flight attitude hanging on the prop to touch the rudder on the ground was impressive. One hiccup from the engine and your no doubt expensive model is dead. The show is worth going to if you're in the area, but maybe after attending for the last several years I've got all the goodies I need and I'm getting jaded. Richard Shilling RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Gyro's for all
It seems like Rick asked a legitmate question. At some point in this decade, I would bet that technology will probably be up to the point where our saiplanes could fly around and thermal completely automonously. That would not make for much of a contest. It reminds me a bit of the questions in Formula 1 racing. At one point, cars had traction control, antilock brakes, active suspension, etc, but it got to the point where there was a perception that too much of the work was being done by the car and not the driver, so they banned that stuff (I understand traction control is coming back, simply because it's too hard to figure out if someone is secretly using it). Anyway, at some point, you will have to decide if you want a technology competition or a skill competition. P.S. I recall that R/C scale aerobatic flying went through this same arguement regarding using gyros for 3d manuvering. I think some of the sanctioning bodies allow it, and some don't. At 05:42 PM 1/20/01 -0800, B R wrote: Did you even bother reading the article, or are you just one of those old flyers like an old dog who can't be taught new tricks or new technology? let me guess, you probably don't even have a cordless phone yet, right? --- Rick Brown and Jill Wiest [EMAIL PROTECTED] wrote: If I understand gyros correctly I would like all the flyers to use them, except me of course. It should enable a TD plane to fly right through a thermal and due to the gyro resisting change, give no indication of it at all. Yes? No? Maybe? J S. wrote: I am curious, do you mean in contests? This doesn't seem like it would be legal. Is there a rule about having a plane equipped with a gyro? To me it seems to take all the talent and challenge out of td flying. Any comments? From: B R [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: [RCSE] Poly angle...Gyro's Date: Sat, 20 Jan 2001 15:28:31 -0800 (PST) Interesting article about Gyro's. Dose anyone use Gyro's for there t/d planes? If so I would like to know everything about you success or failure. Dose it aid in landing, and coring thermals? --- Blaine Deborah Beron-Rawdon [EMAIL PROTECTED] wrote: In Soaring 2161, Dave Seay asked "Is there any science in determining the angle of the poly break and/or its location out from center?" Well, it may not be science, but there is some engineering involved! To summarize, the amount of dihedral (or polyhedral) that a rudder and elevator (no ailerons) sailplane has is a major factor in its roll responsiveness and maximum roll rate, and strongly influences spiral stability. More dihedral increases roll responsiveness, roll rate and spiral stability. Airplanes with more dihedral also require larger vertical stabilizers. The exact arrangement of the dihedral, whether it is two-panel dihedral or a six-panel polyhedral for instance, is less important than the effective amount of dihedral that the arrangement provides. The effective dihedral of any arrangement can be estimated and is commonly referred to as "equivalent dihedral angle" (EDA). For what it is worth, I recommend at least 12 degrees of EDA for most rudder and elevator sailplanes. The arrangement of the panels is a compromise between efficiency while thermalling, efficiency in a rolling maneuver, and stall characteristics while thermalling. In short, arrangements that resemble a parabolic dihedral distribution provide a smooth and efficient lift distribution across the span while thermalling, and avoid large variations in lift coefficient across the span in a steady-state roll maneuver. This is good. Arrangements that have at lot of dihedral concentrated in the outer panels will tend to tip stall prematurely while thermalling. Equivalent dihedral angle is explained at: http://www.rc-soar.com/tech/spiral_eda.htm Envision Design sells software called "Plane Geometry" that enables easy experimentation with dihedral arrangements. Check out: http://members.home.net/evdesign/pages/plane_geometry.html That's all for now. Blaine Beron-Rawdon Envision Design San Pedro, California http://members.home.net/evdesign/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] _ Get your FREE download of MSN
