Re: [RCSE] Aerodynamics books
Monkey King wrote: > > "The Bernoulli explanation of lift > doesn't do it for me; isn't the job of an airfoil to create downward > thrust without stalling?" Take a loogk at http://www.grc.nasa.gov/WWW/K-12/airplane/bernnew.html The interactive windtunnel applets are particulalrly neat :) -- Andrew E. Mileski Ottawa, Canada RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Aerodynamics books
I've recently begun to grasp how little I understand about aerodynamics, e.g. "Normally, an airfoil bends from about 25% from the LE; why are control surfaces so small, then?" Or: "The Bernoulli explanation of lift doesn't do it for me; isn't the job of an airfoil to create downward thrust without stalling?" And so forth. Is there a good book around about low RN aerodynamics? Maybe someone knows how to get ahold of some papers by McCready or Selig? I have a book about full size aerodynamics, but a lot of the time, the stuff doesn't apply. -J RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Walkalong Glider Development
A couple of links: http://www.walkalongglider.com/ <-- the original! http://www.pbs.org/saf/1109/segments/1109-6.htm ^-- the PBS show where i originally saw it -- with Alan Alda of M*A*S*H fame! http://www.modelretailer.com/library/reviews/Specialty/SpecMar02.html ^-- a recent review > The Walkalong glider was originally invented by > Paul McCready's sons, Tyler and Parker, (maybe > with some guidance from dad?) hanging around in > their dad's hangar in the years of the Gossamer > Albatross development. I got the full story of the > original invention from Parker McCready a few > years back, though the details are slipping. I can > confirm that Tyler decided to take the idea to the > toy companies a year or two ago, and see who would > bite, and that he has benefitted from developing > the design in cooperation with whoever it is > that's making it for Walmart, Toys-R-Us, etc. Is > it in fact a Hasbro product? Anyway, it was not > stolen from the McCreadys, which is nice to see. > > Lift > Scobie in Seattle > >> -Original Message- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED]] >> Sent: Tuesday, June 11, 2002 9:15 AM >> To: [EMAIL PROTECTED] >> Subject: Re: [RCSE] It's foam and >> cheapWalkalong Glider type >> >> >> Oh yeah! They work GREAT -- i got a >> pair of them... you need a VERY still >> day, but those things work like a >> charm, and are a good way to get a workout >> without knowing it! fun for the kids, >> too! thermal them off of your heat >> exchanger, your grill, your forehead! >> >> > For you guys that like anything that >> flies and like to >> > save a buck or two Toys-R-Us has the >> "Walk Along" >> > gliders called Air Surfers and they >> come 2 in a pack >> > for $4.98. >> > >> > I have a feeling either Hasbro >> snagged a patent idea >> > or McCreedy sold them the rights. >> From what I can >> > tell it's pretty much the same and >> they fly very well. >> > I haven't gotten it to work off my >> head yet but they >> > come with a board and they work >> awesome off it and fly >> > very well. But it's foam so some of >> you might not >> > like it but it's cheaper than DLG's >> so it's two-fold. >> > :) >> > >> > >> > >> > = >> > -- >> > Glenn W. >> > Tri-Cities, Wa >> > >> > >> >> __ >> > Do You Yahoo!? >> > Yahoo! - Official partner of 2002 >> FIFA World Cup >> > http://fifaworldcup.yahoo.com >> > RCSE-List facilities provided by >> Model Airplane News. Send "subscribe" >> > and "unsubscribe" requests to >> [EMAIL PROTECTED] >> >> >> -- >> ben wilson >> [EMAIL PROTECTED] >> http://thelocust.org >> http://phliteklub.org >> >> >> 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] -- ben wilson [EMAIL PROTECTED] http://thelocust.org http://phliteklub.org RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Book Needed
Good day all. I'm trying to find a US source for a new book about 3 views and documentation. It was featured in RCM May 02. It's called "Aircraft Profiles Vol. 6" "Sailplanes 3". English version. Any help would be greatly appreciated. Lynn in Anacortes WA. Lynn & Meredith King RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Walkalong Glider Development
The Walkalong glider was originally invented by Paul McCready's sons, Tyler and Parker, (maybe with some guidance from dad?) hanging around in their dad's hangar in the years of the Gossamer Albatross development. I got the full story of the original invention from Parker McCready a few years back, though the details are slipping. I can confirm that Tyler decided to take the idea to the toy companies a year or two ago, and see who would bite, and that he has benefitted from developing the design in cooperation with whoever it is that's making it for Walmart, Toys-R-Us, etc. Is it in fact a Hasbro product? Anyway, it was not stolen from the McCreadys, which is nice to see. Lift Scobie in Seattle > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, June 11, 2002 9:15 AM > To: [EMAIL PROTECTED] > Subject: Re: [RCSE] It's foam and > cheapWalkalong Glider type > > > Oh yeah! They work GREAT -- i got a > pair of them... you need a VERY still > day, but those things work like a > charm, and are a good way to get a workout > without knowing it! fun for the kids, > too! thermal them off of your heat > exchanger, your grill, your forehead! > > > For you guys that like anything that > flies and like to > > save a buck or two Toys-R-Us has the > "Walk Along" > > gliders called Air Surfers and they > come 2 in a pack > > for $4.98. > > > > I have a feeling either Hasbro > snagged a patent idea > > or McCreedy sold them the rights. > From what I can > > tell it's pretty much the same and > they fly very well. > > I haven't gotten it to work off my > head yet but they > > come with a board and they work > awesome off it and fly > > very well. But it's foam so some of > you might not > > like it but it's cheaper than DLG's > so it's two-fold. > > :) > > > > > > > > = > > -- > > Glenn W. > > Tri-Cities, Wa > > > > > > __ > > Do You Yahoo!? > > Yahoo! - Official partner of 2002 > FIFA World Cup > > http://fifaworldcup.yahoo.com > > RCSE-List facilities provided by > Model Airplane News. Send "subscribe" > > and "unsubscribe" requests to > [EMAIL PROTECTED] > > > -- > ben wilson > [EMAIL PROTECTED] > http://thelocust.org > http://phliteklub.org > > > 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] AMA Safety Code Proposal
The AMA is just covering their behind on this one, if only for insurance purposes. Don't they fly Quickie 500 races at the NATS? Ever seen this type of race? You've got planes weighing around 4 pounds going 200 mph. Compare that to foamy Zagi at 1 pound going 20 mph. I'm no math major, but I do remember something like Force = Mass x Acceleration. Maybe someone can buy some used batting cages and we can put all the combat guys inside these nets. It would create kind of a "caged animal" vibe that might work well and solve the insurance problem :-) JE -- Erickson Architects John R. Erickson, AIA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Frequency Boards
SOAR uses the same method. And at the SOD farm flying field since the site is not permanent we put up a flag and that is where we post our "clothes pin" channel identifier. Steve On Tue, 11 Jun 2002 09:40:20 -0400 Dick Williamson <[EMAIL PROTECTED]> wrote: >The system Jim describes is essentially like that used by the Charles >River Radio Controllers. We have about 160 members in the club so >frequency conflicts are a common occurrence. The general way that we >operate at our field is described at: > >http://www.charlesriverrc.org/miss_manners_visits_davis.htm > >We have a frequency board with channels numbers along the two edges. >Before someone turns on his transmitter, he clips his pin (with his >name and channel number on it) over the appropriate number on the >board. Having numbers on the board is a help because flyers >occasionally forget their pins. In that case, anything that clips to >the board can substitute. We usually have spare clothes pins around. > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] RE: Combat Foamies and Safety
Good points Jim. I thought I read in the last MA that AMA is self-insured. Steve On Tue, 11 Jun 2002 07:30:19 -0600 "Jim Monaco" <[EMAIL PROTECTED]> wrote: >Actually ? the effect of adding this to the safety code is NOT a ban >on >slope combat. If you read the declaration that you sign on your >membership >application you will see that it states that the effect of violating >the >Safety Code is the invalidation of the AMA INSURANCE. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
RE: [RCSE] Making a rubber ducky
>>No, no replies. This is a very difficult idea. Very few are capable of doing it successfully. If you don't have an oscilloscope and heaven knows what else, you're not equipped. I don't recommend it for any one without very specific experience and tools. Bill Swingle [EMAIL PROTECTED] Janesville, CA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] re: pushrod size
we need to know size and shape of control surface and also expected speed of plane. Also, is this pushrod straight and in line with the load? Even at that, I'm not going to make any guesses unless it seems similar to a plane I'm familiar with. My guess is this would be ok for something like a Zagi. arne wrote: > hi! > > is a 1mm piano wire suitable for 4.5cm long elevon pushrod? it will go on > the top of the wing, so when coming out of dive (the speed and forces are > then greatest) it will work for tension. > > arne -- Lincoln Ross RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Safety Code
I think it's really strange that this rule is coming up at the same time that AMA is easing up on 55lb planes (see the AMA website). I think there is no comparision of risk here. I seem to recall being hit by foamies and slow flyers but these were all non-events. It's the hits on people by hard airplanes that are memorable. THe details of the flying site, parking, where people are standing, etc. are what determine safety in slope combat. Perhaps I haven't been around the really intense events, but it seems to me that an injury from a Zagi is a pretty far fetched event. The only way to be completely safe from injuries is preemptive suicide. And that's assuming one does a thorough job! The scary events and injuries I've seen in aeromodelling involved: propellors (very common), pilots out of control with relatively heavy, fast airplanes, flying over people with hard airplanes (often due to lack of awareness of where the plane is), and structural failure (a wingless sailplane fuse falling from winch height is a very scary spear, especially if you are close enough to hear it) . (I'm not counting the time we had a man carrying craft dead stick onto the field during a contest.) I'll bet within a few years we will see soft, bounceable, pusher slow flyers that would be perfect for combat (electric Zagis have already been used this way). The rule will be really absurd if it bans 5 oz planes going 10mph. BTW, has anyone confirmed this proposal or is it a rumor? I haven't sent out my letter yet as I don't want to cry wolf. Martin Usher > Don't forget that combat foamies are not just foam slope planes. They have > to have nothing hard like the battery or servos within about 2 inches of the > front of the plane. They're going to hit things, we just want to make sure > they don't hurt what they hit. > > While everyone's thinking about this topic it might be a good idea to cloak > those Web sites that show movie clips of DS planes trying to break the sound > barrier while flying right in front of everyones' noses. The AMA might get > the idea that's its dangerous. (It isn't, is it?) > > Isn't it typical. Everyone knows that all the really fun stuff in life is > either illegal, immoral, fattening or just plain dangerous. Its amazing that > the human race has survived as long as it has. > -- Lincoln Ross RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] It's foam and cheap....Walkalong Glider type
Oh yeah! They work GREAT -- i got a pair of them... you need a VERY still day, but those things work like a charm, and are a good way to get a workout without knowing it! fun for the kids, too! thermal them off of your heat exchanger, your grill, your forehead! > For you guys that like anything that flies and like to > save a buck or two Toys-R-Us has the "Walk Along" > gliders called Air Surfers and they come 2 in a pack > for $4.98. > > I have a feeling either Hasbro snagged a patent idea > or McCreedy sold them the rights. From what I can > tell it's pretty much the same and they fly very well. > I haven't gotten it to work off my head yet but they > come with a board and they work awesome off it and fly > very well. But it's foam so some of you might not > like it but it's cheaper than DLG's so it's two-fold. > :) > > > > = > -- > Glenn W. > Tri-Cities, Wa > > __ > Do You Yahoo!? > Yahoo! - Official partner of 2002 FIFA World Cup > http://fifaworldcup.yahoo.com > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and "unsubscribe" requests to [EMAIL PROTECTED] -- ben wilson [EMAIL PROTECTED] http://thelocust.org http://phliteklub.org RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] It's foam and cheap....Walkalong Glider type
For you guys that like anything that flies and like to save a buck or two Toys-R-Us has the "Walk Along" gliders called Air Surfers and they come 2 in a pack for $4.98. I have a feeling either Hasbro snagged a patent idea or McCreedy sold them the rights. From what I can tell it's pretty much the same and they fly very well. I haven't gotten it to work off my head yet but they come with a board and they work awesome off it and fly very well. But it's foam so some of you might not like it but it's cheaper than DLG's so it's two-fold. :) = -- Glenn W. Tri-Cities, Wa __ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Foamies
> Foamies SUCK Death to foamies. There in lies the problem: Foamies never die, they just get mushed and need a new tape job. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Foamies
Mirko you really haven't expressed yourself completly about this subject. I think you need to share your true feelings with the group. I mean has a foamie had carnal knowlege with your sister? Or were you possibly scared by a foamie while in the crib? Just what brought on these hostile feelings towards an object that many of us hold in high regard? Maybe there are evil foamies running around out there and a warning needs to be issued. So tell us "the rest of the story" !!! Inquiring minds wanna know!!! Joe Original Message Follows From: "menez_hom" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: [RCSE] Foamies Date: Tue, 11 Jun 2002 03:32:17 - Foamies SUCK Death to foamies. Mirko Bodul 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/intl.asp. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
