Re: [RCSE] Bottom hinged, top actuated flaps, Why?
I think the prime reason of using top actuated arrangement is to reduce the amount of protrusion on the wing surface and hence cut down the drag . On my Pike WR, the end of the control horn for the flap is flush with the top surface of the wing. The length of the control horn is equal to the thickness of the front part of the flap so the entire horn can be buried inside the wing. I can show some photos if you are interested. With bottom actuated arrangement, there are bound to be some protrusion unless the control horn has zero length. Y C LuiSteve Gibson <[EMAIL PROTECTED]> wrote: Why do the designers go with bottom hinged, but top actuated flaps? Whycomplicate things on setup geometry and cutting holes in wings.Isn't a bottom hinged, bottom actuated flap just as effective and easier toinstall?(Spell check completed ! )RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.Do You Yahoo!?Get your free @yahoo.com.hk address at Yahoo! Mail.
Re: [RCSE] Bottom hinged, top actuated flaps, Why?
Steve. . .if less drag is the reason bottom hinged flaps are top actuated, it makes a case for using the Rotary Driver System, as Bob Pope says, if possible. The RDS for flaps works perfectly if bottom hinged and. . . . nothing hangs out at all to cut drag. The flap servos, however, do have to be oriented at 45 degrees to the hingeline and if servo wells are molded in for use with traditional linkage of a horn and pushrod, then the RDS can't be used without some innovation. A source for info on the RDS is in the RDS website www.proptwisters.org/rds2/ . However, since I put that together, I have also created the GENIE CD which has even better material on it than the website. The GENIE CD is $5 postpaid in the US and $7 outside the US. It is a huge resource for various practical, modeler-related things I've picked up over 35 years in R/C. 26 S. Roosevelt, Walla Walla, WA. 99362 - Original Message - From: "Steve Gibson" <[EMAIL PROTECTED]> To: "rc Soaring Exchange" <[EMAIL PROTECTED]> Sent: Saturday, February 28, 2004 12:59 PM Subject: [RCSE] Bottom hinged, top actuated flaps, Why? > Why do the designers go with bottom hinged, but top actuated flaps? Why > complicate things on setup geometry and cutting holes in wings. > Isn't a bottom hinged, bottom actuated flap just as effective and easier to > install? > > (Spell check completed ! ) > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Bottom hinged, top actuated flaps, Why?
Less Drag would be an RDS system, get rid of those big ole tunnels. BP Ben Diss wrote: Less drag. Steve Gibson wrote: Why do the designers go with bottom hinged, but top actuated flaps? Why complicate things on setup geometry and cutting holes in wings. Isn't a bottom hinged, bottom actuated flap just as effective and easier to install? (Spell check completed ! ) RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Bottom hinged, top actuated flaps, Why?
Less drag. Steve Gibson wrote: Why do the designers go with bottom hinged, but top actuated flaps? Why complicate things on setup geometry and cutting holes in wings. Isn't a bottom hinged, bottom actuated flap just as effective and easier to install? (Spell check completed ! ) RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
[RCSE] Bottom hinged, top actuated flaps, Why?
Why do the designers go with bottom hinged, but top actuated flaps? Why complicate things on setup geometry and cutting holes in wings. Isn't a bottom hinged, bottom actuated flap just as effective and easier to install? (Spell check completed ! ) RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
