[RCSE] What makes good hinge-tape, fast?
Friend wants to fly this weekend, open-class plane from a slope. No time to order fancy mylar hinge tape from Sal. It is Saturday. Any recommendations on hinge-tape that works real well, that can be bought in a store? -Paul RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Test (DELETE)
Sorry: Testing new subscription stuff RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Dynamic Soaring - Loops and Zoomies
I have to agree with the case that Blaine brings up in the below. The case in sEM did not include variations in the vertical velocity, but considered only horizontal variations... I apologize if I did not make my assumptions clear enough here. The article discussed a shear layer that was parallel to the ground, with the actual penetration of the shear layer a little ways from the slope. The half-pipe type DS stuff has a velocity vector change that is perependicular to the velocity gradient, which produces a DS type phenomenon. Really short on time, sorry for the brevity, Joe -Original Message- From: Blaine Deborah Beron-Rawdon [EMAIL PROTECTED] To: Soaring [EMAIL PROTECTED] Date: Saturday, March 11, 2000 8:11 AM Subject: [RCSE] Dynamic Soaring - Loops and Zoomies 3/11/00 In a post in Soaring 953, Joe Wurts mentioned that "one cannot gain energy via crossing a shear boundary twice between air masses without making a change in the velocity vector" and that a recent SEM article was incorrect in claiming that you can do dynamic soaring by doing loops in front of the slope. I respectfully disagree with Joe on the second part. If the flow in front of the slope is uniform in speed and direction it is correct that you cannot derive extra energy by doing loops into the wind. However, if the slope is shaped like a vertical cliff with an abrupt lip (Torrey Pines, or in my case Point Fermin) the flow is not uniform near the lip. Below the lip the wind direction is relatively vertical. Above the lip the flow is more horizontal. If you consider only the vertical component between these two spots there is a vertical velocity gradient and potential for dynamic soaring. By diving down the face from above the lip to below the lip there is an extra increase in airspeed due to the increasing vertical component of the wind. Pulling up (the first half of the loop) in the approximately uniform air mass results in the standard loss of speed. Zooming up now passes us back through the vertical velocity gradient so that the loss of airspeed is less than it would be in uniform air. It seems to me that the essence of dynamic soaring is exploiting gradients in air velocity. If so, looping in this manner qualifies as dynamic soaring. By repeating this multiple times it is possible to get the model pumped up. I have been amazed in the past how energetic this maneuver is even in light wind -before Joe clued us in to the general idea and diversity of dynamic soaring. A variation of this loop is the "zoomie" maneuver that is seen so often on square-edged cliffs. This maneuver is done in a vertical plane parallel to the cliff face. The airplane is dived below the cliff edge and pulled up into a steep climb. This is followed by wingover (to the windward direction!) and another steep dive, pullup, wingover and so on back and forth. The model looks kind of like a child on a swing. This maneuver exploits the same gradient as the loop and pumps the model up into huge altitude gains and high speeds. Because it is exploiting the gradient, it is also a form of dynamic soaring. That¹s all for now. Blaine Beron-Rawdon Envision Design San Pedro, California 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] Boom at Parker Mtn.....
Well actually it was more of a "pop"...that is if I could hear it. I had my first DS wing failure yesterday at Parker Mtn in high Santa Ana winds. I only made 1 1/2 turns before the left wing decided to depart from the rest of the aircraft. The plane I was flying was a 50 inch span composite home-brew that was strong enough to handle any wind on the frontside. I thought it was strong enough to handle aggressive dynamic soaring as well. I was wrong.but it looked pretty cool. Doug RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Mylar staying flat
Mikey, If the sun shines in your part of the world, lay the mylar in the driveway or car hood. Be sure to lay it on some paper to prevent scratching or better yet, some black plastic tarp would work well. After I bag a wing, the mylars are usually flat and stay that way because I hang them on the wall with a tack. I use .016 mylar and always get it on a roll. - Original Message - From: Mikey D [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, February 10, 2000 3:51 PM Subject: [RCSE] Mylar staying flat Although it's just annoying, I'm wondering if there is a way to straighten out mylar on a flat surface. Every time I order mylar for my project the UPS man seems to deliver it in a rolled package. (That's how my supplier ships it). I have to tape the mylar to my workbench to get it to lay flat. When I'm done with my project the mylar rolls back up. Does anyone have the same problem I have? Looking for a way to make this stuff lay flat. Thanks Mikey D 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]
Re: [RCSE] What makes good hinge-tape, fast?
I found some Scotch 3M #190 clear plastic tape in the local True Value Hardware store. Seems the same as some wider clear 3M window insulating tape there also. that works pretty well for my HLG. Rodger - Original Message - From: "Paul Klissner" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, March 11, 2000 12:33 PM Subject: [RCSE] What makes good hinge-tape, fast? Friend wants to fly this weekend, open-class plane from a slope. No time to order fancy mylar hinge tape from Sal. It is Saturday. Any recommendations on hinge-tape that works real well, that can be bought in a store? -Paul 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] Cool Boeing Videos
Just for the love of flying: Boeing has some cool clips of F22 and F15s from outside as well as inside the cockpit. Catch the aileron roll video of the F15 for a feeling of how "out there" the pilot is in this machine. Must be quite a kick. http://www.boeing.com/companyoffices/gallery/streamingmedia/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Lousy LZ at Your Slope??
Checkout the F16 Carrier landing from over the shoulder of the pilot. Things happen REAL fast! jtm http://www.boeing.com/companyoffices/gallery/streamingmedia/trapots.html RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Cobra for sale
A friend wants to sell a NIB F3J Cobra. Any interested parties please reply to the below listed address. __Mike Z Mike: For some reason I can't seem to be able to get in the soaring list. Could you please paste this FOR SALE message: FOR SALE: Cobra white and red, light version, 74oz, ready for delivery, US$ 1180 plus 15 for shipping. email [EMAIL PROTECTED] Mario I. Scolari Anklesaria Group, Inc. 140 Marine View Suite 120, Solana Beach, CA Voice (858) 755 7119 Cell (760)612-6994 [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] the wing is the thing!!
Go here, listen to all the suggestions that Nathan Woods gives, he has the best nformation. People would be nuts not to follow them. DON"T ASK ME HOW I KNOW. I fly a 15+ oz wing wished mine was down to 13oz. Remember you can always add ballast, can't take it away. Good Luck http://www.boomerangwings.com -- Glenn R. Whitcomb Elko, NV [EMAIL PROTECTED] http://www.gbcnv.edu/~glennw RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] DS with a hand launch
i been reading the DS messages and getting pretty interested in give it a try.. there was a message that sed that while there were people flying the front part of the slope"i guess the lift zone of the slope"he was flying the "back side"is this the rotor area?? i got confused! can some body give me any advise on how to start learning to DS? Take a look here, and click on the "Dynamic Soaring" link: http://ourworld.compuserve.com/homepages/dlstone/ David Berkeley CA USA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
RE: [RCSE] Decalage (was: Stab size)
Chris Bruner writes, in regard to Mark Drela's post, ...Decalage refers to the incidence of the tail relative to the wing, and DOES affect the handling (note that if you compensate with elevator, you've not changed the decalage). Too much decalage requires too much nose weight and makes the airplane handle like a snowplow, to use Thornberg's term... The key point here is that in order to change the decalage and NOT exactly cancel it out with the opposite elevator required to keep the model in trim in pitch, you have to change the C/G. The change in handling is due to the C/G change, NOT the decalage change. Looking at it from a "control theory" standpoint, handling is primarily related to dynamic effects, not steady-state effects. One of the main points that is made in the very first classes of undergrad-level vibrations and control theory fundamentals courses is that for reasonably linear systems (as Mark pointed out), a steady-state force change (such as the direct effects of incidence or decalage changes) does NOT significantly change the dynamic characteristics of the system. If you're seeing a significant change in handling qualities, it is due to some side effect that, although it might have been triggered by the decalage change, was not directly due the decalage change itself. Don Stackhouse @ DJ Aerotech [EMAIL PROTECTED] http://www.bright.net/~djwerks/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] more DS questions
a slope 70deg on the front and 45deg on the back, or a slope 45deg on the front and 70deg on the back. which one is better? Since a 45deg. slope is actually very steep, my guess is that either of those slopes is more than steep enough to get good separation if the ridge is narrow enough, wind is the right direction, etcI bet there wouldn't be much of a difference btween them. David Berkeley CA USA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Zagi THL
One candidate is the Zagi THL, that is Thermal Hand Launch, which naturally will thermal, as the name implies, even if it takes its time to get there (that is, it aint a speed demon)! Equip it with a hook and you'll have lots of fun chasing thermals! For a night-time hand launch of my THL see URL:http://www.ozemail.com.au/~majali/Zagi-THL.jpg For hook design see URL:http://home.beseen.com/hobbies/jebbushell/tord/tord.htm There are lots of other model flying wings that are designed for thermal use, especially in Germany! Full-size thermalling flying wings can be found in the US and France, for instance :-)! See also URL:http://www.halcyon.com/bsquared/winglinks.html Yours, Tord, Sweden -- If reply difficulties - use [EMAIL PROTECTED] Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] ECHLC May 6-7, 2000
On-line registration materials for the 2000 East Coast Hand Launch Classic are now available.See the web site at http://www.soarmd.org/ECHLC/index.htmlfor more information and a 1999 winnerslist. The dateis May 6-7, 2000. The place is Baltimore, Maryland, USA. Afull weekend of hand launch competition. Bigger and better than `99! 12 rounds flown over two days in 1999 with 44 contestants.AMA and Eastern Soaring League sanctioned.Tasks will complement those of the IHLGF in June. (A perfect warm-up!) Details on rounds and tasks will be posted prior to the contest on the BASS web site at www.soarmd.orgFlying site is easily accessible from the I-95, I-83 and I-70 Interstatecorridors. Baltimore Washington International Airport (BWI) has great lowairfares via Southwest and US Airways Metrojet. See http://www.soarmd.org/ECHLC/bwi.html Thank you! ---Steve PasierbCompetition DirectorBaltimore Area Soaring Societywww.soarmd.org
[RCSE] Aireron Cutouts, How do you make them perfect
Help, I had a hard time cutting out my ailerons on a glass wing today. I used an e-xacto knife guided by a strait edge on the bottom skin, got poor results, then I tried a razor saw on the top skin, and got poor results. Ok I butchered them. How do the Experts cut ailerons on glass skins over foam and make them perfect, i.e. no wiggles and no mismatches, I need to know. Jim and Mary Jo Jacobson RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
