Allan I was able to stiffen my flaps on the perfect very considerably by just connecting the rear upper end of the servo to the wingskin. Now the servo is glued to the upper wingskin, and it is also connected with a piece of prepreg carbon to the lower wingskin in the direction of the pushrod.
I am using 368s and did not get any flutter so far. Beat Knox, Allan - SAL Wrote: > Hi, I have a new 80 series Carbon Perfect with socks on all control > surfaces. > > I was planning to use JR DS368 servos on the wing including flaps. I > hear that DS3402s are preferred to prevent flutter? > > I note that the 368 is only 10% less powerful than the 3402 but does > have a smaller case so is harder to mount stiffly. > > Flutter is usually a function of stiffness, Stiffer the flap and its > linkages then the higher the flutter speed. > > I would try and tie the servo into both top and bottom skin to improve > rigidity. > > Can I have some expert comment from those who have been there and done > that including anyone who has had the dreaded Perfect Flutter (shower > of > carbon bits). Craig?? > > Allan in NZ > > Please consider the environment before printing this e-mail > ____________________________________________________________________ > CAUTION - This message may contain privileged and confidential > information intended only for the use of the addressee named above. > If you are not the intended recipient of this message you are hereby > notified that any use, dissemination, distribution or reproduction > of this message is prohibited. If you have received this message in > error please notify Safe Air Ltd immediately. Any views expressed > in this message are those of the individual sender and may not > necessarily reflect the views of Safe Air. > _____________________________________________________________________ > For more information on the Safe Air Group, visit us online > at http://www.safeair.co.nz/ > _____________________________________________________________________ -- trend.ab ------------------------------------------------------------------------ trend.ab's Profile: http://www.rcgroups.com/forums/member.php?u=83660 View this thread: http://www.rcgroups.com/forums/showthread.php?t=838894 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
