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- Newsgroups: rec.models.rc
- Path: sparky!uunet!ftpbox!mothost!white!rtsg.mot.com!svoboda
- From: svoboda@rtsg.mot.com (David Svoboda)
- Subject: Re: Advice on a 1/2 A Scale Zero?
- Message-ID: <1992Nov6.004727.10001@rtsg.mot.com>
- Sender: news@rtsg.mot.com
- Nntp-Posting-Host: guppie44
- Organization: Motorola Inc., Cellular Infrastructure Group
- References: <1d8ur3INN7h6@usenet.INS.CWRU.Edu> <1992Nov4.184310.29681@noose.ecn.purdue.edu>
- Date: Fri, 6 Nov 1992 00:47:27 GMT
- Lines: 87
-
- In article <1992Nov4.184310.29681@noose.ecn.purdue.edu> mgwheele@author.ecn.purdue.edu (Matthew G Wheeler) writes:
- |
- |My question's are concerning a half built 1/2 A scale Zero that I started to
- |build before I knew anything about RC. The kit seems pretty good although the
- |directions are a little sparse.
-
- Heh, heh. I was just discussing this with someone today.
-
- Who's the kit manufacturer? Was it meant for RC. Is it a House of Balsa, by
- any chance? If so, would you sell it to me? :-)
-
- | 1). Will I be able to fly it? Low semetrical 28" wing + no throttle
- | + elevator-aileron control = fast and manuverable?
-
- It might be a little hot for you. That's pretty small for a 1/2A airplane, so
- the wing loading will be pretty high. And the symmetrical wing won't give you
- all too much lift. (Most quick 1/2A planes are semi-symmetrical.) Definitely
- get experienced help for the first flights.
-
- | 2). How do I know if it's to heavy. What's an appropriate wing loading
- | for this type of model.
-
- I always liked to aim at anything under 16 ounces for a good-performing 1/2A.
- You might want to aim a bit lower, since you have little wing area. (I know,
- I didn't answer about wing area, but on 1/2As I tend to concentrate more on
- power loading.)
-
- | 3). I'm triing to get this thing in the air farily cheaply. Are micro
- | servos a must? Are there special light weight recievers? Who has
- | the cheapest prices.
-
- I strongly advise micro-servos, for the weight (you can save close to an ounce
- right there), and the size. Some fuselages are narrow enough you have trouble
- fitting two mini-servos. You probably don't want to even consider standard
- servos in a plane that small.
-
- A tiny reciever will not be all that much lighter than a normal one, in my
- (rather limited, on this) experience. The most consideration is the size of
- the fuselage, and whether a normal receiver will fit.
-
- I have an RCD 535 FM micro-reciever for 1/2A, btw. It was under $100.
-
- A strong consideration is the flight battery. With two micro servos and a
- non-PCM reciever, you can get away with a 200mah or smaller battery, at the
- expense of some flight time. That saves a LOT of weight. Also, you should
- get a smaller switch harness, as the standard ones are large and heavy.
-
- If you decide to go too cheap, the plane won't fly well. Even if you spend
- some money on micro equipment, the little ones turn out to be pretty cheap,
- comparitively.
-
- | 4). I have a cheap Cox Black Widow motor. Is this sufficient or
- | should I get something else (throttle control, more power)?
- | What about a gas tank. I think I'll get pretty short flights
- | using the built in tank on the Black Widow motor.
-
- If I remember right, the Black Widow will run for about three-and-a-half
- minutes per tank. Since you don't have a throttle, it is often just as
- well that the tank is small; you can't land until the engine quits. You
- can always fuel up quick and go again, too.
-
- Power; well, the Black Widow is the most powerful of the reed-valve .049s,
- but you would without a doubt get more power from a TD. In that case, too,
- you would use a klunk tank (one or two ounce), or possibly a (Tatone?) tank
- mount, which serves both purposes. Whether the power of the TD would be
- necessary depends on how heavy the plane comes out. Try what you have, and
- if it doesn't fly, or you want more pep, you can always get a TD later.
-
- | 5). Should I leave off the landing gear? Hand launch and slide in on
- | the belly to land.
-
- Definitely. You can save an ounce or so, at least, by leaving off the gear,
- and lose some parasitic drag, to boot. And a little warbird looks great
- flying around clean, like that. If you use a plastic prop (use a plastic
- prop!), you won't break anything landing on the grass. Hand launching is not
- hard, it just takes a little practice.
-
- |Answers to these Q's and any other helpfull advice on 1/2 A scale models would
- |be greatly appreciated. Thanks a bunch guys.
-
- MAKE IT LIGHT! Use a lightweight covering (like SolarFilm; is that stuff still
- available?), don't add any doodads, sand a lot, use nyrods and small hardware.
- Think weight, weight, weight.
-
- Email me if you have any more questions, or complaints. :-)
-
- Dave Svoboda, Palatine, IL
-