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- Path: sparky!uunet!cs.utexas.edu!qt.cs.utexas.edu!news.Brown.EDU!brunix!jfh
- From: jfh@cs.brown.edu (John F. Hughes)
- Newsgroups: rec.models.rc
- Subject: Newbie question (iceboats!)
- Date: 28 Dec 1992 20:29:58 GMT
- Organization: Brown University Department of Computer Science
- Lines: 35
- Distribution: usa
- Message-ID: <1hno46INNl23@cat.cis.Brown.EDU>
- NNTP-Posting-Host: euclid.cs.brown.edu
-
-
- I want to build a RC Iceboat. This should be *lots* easier than a plane,
- for a number of reasons. (1) I've built two full-sized iceboats. (2) I've built
- lots of models of boats. (3) It doesn't have to fly.
-
- But I have a problem: control. I basically need two controls: one to
- tighten/loosen a string (the "sheet") and one to move the steering blade at the
- front of the boat. I figured that a worm drive would probably be OK for the
- latter, but it meeds to respond fairly fast. The sheet control can be
- moderately slow. How fast is fast? Basically, it should go from one extreme to
- the other in about 1/2 - 1 sec. 1 second would be pushing it...
-
- Anyhow, here's my question: about how much will it cost me to do this. Remember
- that weight is not a big problem here, so old and clunky stuff will suffice.
- Nor is reliability a big problem. If it craps out on me, I sail up to it on
- my (real) iceboat and carry it home. But I do need, at the very least, a way to
- xmit two channels of data to the boat, and a way to receive two channels at the
- boat and convert them to actions (trim/ease sheet, turn port/starboard).
- I've seen chips (of the Radio Shack sort) that are nominally R/C xmit/rec'v
- units, and cost about $5. I assume that lots more needs to be hooked to these
- to make them practical.
-
- So....
-
- Can anyone who is something of an R/C expert give me a hint on (1) how much
- this might all cost to do, in a cobbled-up, used-parts, kind of way, and
- (2) how hard it might be to grow my own xmit/rec'v units from these one-chip
- devices? We're talking, for those interested, in transmitting across distances
- of perhaps 1 mile.
-
- Given the level of expertise I've seen in this group, e-mail answers seem
- most appropriate. I'll read the news regardless, but my e-mail is
- jfh@cs.brown.edu. Thanks lots.
-
- -John
-