[RCSE] Shredair SCAR Flight Report.
Paul, glad you liked the Scar. Pesonally, I have seen it fly on the slopes before, by an experienced pilot(s), and I wasa little underwhelmed. It just didnt appear to be that fast. Maybe it was set up wrong, and I am sure it is probably a pretty darn good F3B plane, but a slope racer its not- at least not the onesI have seen fly. I know a guy who had a Scar and a 3Cam, and the 3Cam seemed to be faster on the slope.Any comments from others w/slope/Scar experiences?
[RCSE] F3J And Thermals!
Good Morning! Looking at what people are choosing to do with the new F3J rules.. I think the safest tow would be a straight out tow.. I don't believe the tow will have the energy of the conventional tow method.. But with the new lighter weight ships out, They would do a bit better with a weaker tow. There will be more time spent on the line, hence lower flight times. So who cares!! All pilots will be on the same page! The only problem I see is the creative tow tactic's. There is the opposite tow, where the is an anchor man that runs twords the glider. and the pulley man who runs away from the glider.. This can be a problem if something lets loose. According to the rules in our contest coming up in the rockies.. The CD states that if you should do this type of tow, a saftey harness will be attached to each towing device to the tow man. I don't believe this was ever allowed in the original F3J tow rules. It stated hand tow..Hold it with your hand!!! You couldn't use a harness of any kind! Well who is to decide that if we do use the saftey strap. That the tow men aren't useing this strap to actually tow?? Or will there be a certain amount of slack in the saftey strap?? Will we trip over this slack?? I see this to be a kind of Charlie Foxtrot! F3J is very competative ! Pilots are going to push the limits to get into the hunt! Or on the team! Or win the worlds! This could be where a saftey issue could be a problem.. Trying a new method. Not a proven one! If the new rules should stay in effect.. I would have to vote for only one tow. Straight out! This is safe and its the same for everyone. As was the original rule! There were no tricks other than just good tow men! I will agree with the Germans.. This is insane as far as I am concerned.. There are sports that go on each and every day that involve injuries. This sport is not a dangerous sport!!! If a protest should happen I would support it! Thermals Shmermals!! The next thing we are going to say is that we understand women! Thermals are a product of mother nature! And as we all know Mother nature is very hard to figure out. Oh??? Maybe because she is a woman?? hahahha I don't believe they rotate.. I have studied birds of pray for 16 years. They don't have a preference in left or right. I see birds change direction more than we do. I see some pilots get into a thermal and once we are locked in, they tend to just keep it in the same turn... Birds on the other hand move around much more. I have flown full scale gliders for 14 years.. One flight I hooked a thermal , and took it up several thousand feet..I was above a ranch that was burning a pile of brush.. This smoke and smell stayed with me for several thousand feet.. I decided I couldn't handle it anymore.. I ran to another thermal, When looking back the smoke from this fire was just a straight plume rising upwards. It wasn't rotating! Just rising like smoke from a cigarette in an ashtray.. One gentleman was talking about a down wind turn in a thermal.. Once your in a thermal, I don't belive there is a downwind.. But it could be a sink turn..Flying half in lift. half in sink! Charlie RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Thermal Mixing
Do those of you who fly this type of aircraft mix your flaps to ailerons? That is to say, add a little aileron to your flaps? Or, do you just rely upon ailerons during thermal turns, and leave the flaps set at a specific camber position adding greater lift during this sequence? Secondly, does anyone use elevator--flap mixing to enhance control during your landing approach? Thanks. -- *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* Simon Van Leeuwen, Calgary, Alberta RADIUS SYSTEMS Cogito-Ergo-Zoom IAC25233*MAAC12835*IMAC1756*LSF5953*IMAA20209 *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Re: Tandem-winged Planes
There are a few issues involved here. The front wing must stall before the main wing, which, in a lowdrag installation often is solved by having wider chord on the rear wing (thus lower AR), usually combined with higher loading on the front wing. The same airfoil can be used, but low pitch airfoils are most likely recommended. According to Boeing research, refered to in one of Darrol Stinton's books, the lowest drag can be had for three-surface aircraft, where manouvering is done with a conventional tail, but trimming is done with the front wing. As the front wing can only be used for pitch adjustments, that is no ailerons or elevons, roll authority might be low. Anhedral on the front wing might be wise, and dihedral on the rear. Often you see sweep on the rear, combined with wing-tip fins. So sweet-stalling front wing, combined with low drag airfoils, should result in a plane with low sink rate as the average wing-loading is lower than a similar conventional plane. Tord S Eriksson www.tord.nu Tord S Eriksson www.tord.nu RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Re: Tandem-winged Planes
- Original Message - From: Tord S Eriksson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Friday, May 18, 2001 7:30 PM Subject: Re: Tandem-winged Planes There are a few issues involved here. The front wing must stall before the main wing, which, in a lowdrag installation often is solved by having wider chord on the rear wing (thus lower AR), usually combined with higher loading on the front wing. The same airfoil can be used, but low pitch airfoils are most likely recommended. According to Boeing research, refered to in one of Darrol Stinton's books, the lowest drag can be had for three-surface aircraft, where manouvering is done with a conventional tail, but trimming is done with the front wing. As the front wing can only be used for pitch adjustments, that is no ailerons or elevons, roll authority might be low. Anhedral on the front wing might be wise, and dihedral on the rear. Often you see sweep on the rear, combined with wing-tip fins. So sweet-stalling front wing, combined with low drag airfoils, should result in a plane with low sink rate as the average wing-loading is lower than a similar conventional plane. Tord S Eriksson www.tord.nu Tord S Eriksson www.tord.nu RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Re: re: re: Right VS Left
The tornado I had the fortune to see very close up (we have them here, too, occasionally) showed very graphically that the flow in the funnel rotated downward in one direction and upward the other! Tord S Eriksson www.tord.nu RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Glue strength/moment arms
Hi all, am replacing the steel elevator pushrod in my Scar with carbon rod. Have done a test piece with couplers glued on with epoxy and CA. The CA joint failed at 72 lbs (32.7kg) measured pull. My question is would the epoxy joint be safe for elevator use since the servo has a pulling power of around 10% (3.5kg) of the strength of the glue joint? Is there a risk with the moments involved of the joint being overstressed? I'm thinking not but there should be some design experts out there who can advise us all. Cheers, Les. _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Results from May 12 Seattle HLG contest
As always, another beautiful day in Seattle! We had light, variable winds for the first couple of rounds in the morning, and as the day progressed the winds came up from the south, but just enough to move the floaters down the field. The thermals were big in the morning but became smaller and harder to find as the day progressed. 16 pilots were out to fly and another 5 or so in the club had lame excuses (like dislocated shoulders), so we've got a really great group of HLG'ers in the area and we're always growing! Out for his first outing was Jay Allison with a Sidewinder, he managed to find a thermal or two and I hope, have a good time! We had one soldier make it in from Tri-Cities, Glenn Whitcomb, and he was happy to add his Sidewinder into the fray. The best piloting for the day was put in by Paul McKee with his own designed Fire Eagle. Paul must have been flying really high, because I don't remember seeing him more than a couple of times in the air the entire day! Phil Pearson was back in the groove and fought to second place with his own design Encore. I managed a 3rd with my Ionosphere for four rounds and flew three rounds with the Dizzy Bird prototype (59 EPP HLG). The rest of the contestants ranked as follows: Pilot Plane Airfoil #1000 pts Final Score Paul McKee Fire Eagle (own design) AG16-AG18 5 6695 Phil PearsonEncore (own design) Secret 2 6484 Adam Weston Ionosphere (own design) Try12A 3 6327 Mark Bryan Tweener AG161 6169 Dave Beardslee Tweener AG163 6118 Jim Pearson Sunspot/Encore S6063 3 6024 Dick Barker Uplink 58 (own design) Uplink003 2 5987 Ole SkotvoldTweener AG160 5963 Tim Johnson Cosmos (own design) AG041 5876 Jonathan Bryan Tweener (own design)AG160 5876 Lauren Anstead Uplink 58 SD7037mod 0 5671 Russ Young Tweener AG161 5617 Bruce Kimball Terminator SD6063 1 5344 Glenn Whitcomb Sidewinder S6063mod0 5286 Tim Naugler Uplink 58/Orbiter2 Uplink003 0 5017 Jay Allison Sidewinder S6063mod0 4140 Thanks to Thermal-Gromit Works (www.tgworks.com) for donating door prizes: a Downer model down alarm, a 5 piece CA set, and 2 eat-sleep-fly T-shirts. Our next HLG contest will be July 14th. Also, keep August 11th and 12th open for the Pacific Northwest Hand Launch Glider Regional competition. Keep checking Thermal-Gromit Works' and SASS's website (www.seattlesoaring.org/sass) for details on this exciting two day HLG contest (or email [EMAIL PROTECTED])! Thermals, RED -- Adam Weston Seattle, WA RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
