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Search: Posts Made By: mfr02
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04-26-2021, 12:27 AM
Replies: 2
Views: 179
Posted By mfr02

Power or sail cat? Either, scaling up usually...

Power or sail cat?
Either, scaling up usually works.
04-24-2021, 01:43 AM
Replies: 2
Views: 189
Posted By mfr02

Most "full range" radios claim 0.5Km surface...

Most "full range" radios claim 0.5Km surface range. There is a legal limit on transmitted power, so that tends to be the power that is transmitted. Operating over lumpy water will reduce that.
Any...
04-12-2021, 01:41 PM
Replies: 3
Views: 201
Posted By mfr02

Step 1 Look here - SEACHARGER - SeaCharger...

Step 1 Look here - SEACHARGER - SeaCharger Oceangoing Autonomous Boat - Home (http://www.seacharger.com/)
Step 2 Figure out why his had the result that it did, and look for a way round the...
04-11-2021, 04:43 AM
Replies: 10
Views: 392
Posted By mfr02

Being an occasional customer of Cornwall, I...

Being an occasional customer of Cornwall, I agree. Postage from them to me is very reasonable, but then again, we are in the same country.
Just had a look on their site because a new range of...
04-11-2021, 12:46 AM
Replies: 10
Views: 392
Posted By mfr02

Inrunners tend to be good for high speed, low...

Inrunners tend to be good for high speed, low torque situations, i.e. a tiny prop spinning very fast. Most boats, even quite quick ones, tend to need torque to get them up to speed and then keep it....
03-25-2021, 01:01 AM
Replies: 4
Views: 327
Posted By mfr02

It's in the nature of the physics of LiPo...

It's in the nature of the physics of LiPo batteries that they are 3.7 volts per cell. 3 in series (3S) gives 11.1 volts. As with all batteries of whatever type, the voltage on the label is a...
03-24-2021, 01:37 AM
Replies: 4
Views: 327
Posted By mfr02

Screen grab of a search. just a question of using...

Screen grab of a search. just a question of using the right terms. As long as the physical size needs are met, and the C-rating and / or capacity figures are the same or better, it will work.
The...
03-22-2021, 01:18 AM
Replies: 49
Views: 1,417
Posted By mfr02

A normal 270 degree pot uses the middle 1/3 of...

A normal 270 degree pot uses the middle 1/3 of its travel, giving about 90 degrees, 45 each side of centre. In the case of a10 turn pot the middle 1/3 = 3 1/2 turns, or near enough. Obviously, no...
03-21-2021, 01:38 AM
Replies: 49
Views: 1,417
Posted By mfr02

From my earlier post - With servos, the...

From my earlier post -

With servos, the centre neutral is where you say it is with the transmitter stick at central. A point that is often missed is that the servo shaft and arm have splines that...
03-20-2021, 02:35 AM
Replies: 49
Views: 1,417
Posted By mfr02

Yes, that is the entire idea of servos in radio...

Yes, that is the entire idea of servos in radio control.
The system is designed so that the transmitter produces a coded signal set by the pot under the stick. The receiver takes the transmitted...
03-15-2021, 12:49 AM
Replies: 49
Views: 1,417
Posted By mfr02

Usually Kg/cm. The last bit is important. It...

Usually Kg/cm. The last bit is important.
It hasn't been stated yet, but what type and size of rudder? Is it an end pivoted barn door, or a semi balanced type? Semi balanced needs a lot less...
03-13-2021, 02:34 AM
Replies: 49
Views: 1,417
Posted By mfr02

Standard size, but high torque servos are readily...

Standard size, but high torque servos are readily available usually marked as "sail arm servos". Not noticeably slower than regular servos, but they do pull more power. A metal geared one would...
03-12-2021, 01:22 AM
Replies: 2
Views: 294
Posted By mfr02

Auto pinstriping tape, properly applied to a...

Auto pinstriping tape, properly applied to a clean surface, generally should be tough enough to stay put for many years through whatever the auto drives through. On a model yacht or cruising boat,...
03-11-2021, 01:47 AM
Replies: 49
Views: 1,417
Posted By mfr02

Do lots of shopping around comparing specs. Then...

Do lots of shopping around comparing specs. Then be happy with the HK T4A V2. Cheap, simple, reliable. Replacement/spare/extra receivers among the lowest cost, readily and reliably available. ...
03-10-2021, 09:52 AM
Replies: 26
Views: 749
Posted By mfr02

That 320A ESC uses "Oriental Amps" which are...

That 320A ESC uses "Oriental Amps" which are tiny, delicate things. It has become almost as infamous as the "Johnson 555" motor. Normally its a 7,2 volt unit, but there is also a higher voltage...
Forum: RC Sailboats
03-10-2021, 01:34 AM
Replies: 23
Views: 5,099
Posted By mfr02

A bit of extra to the above - the added weight,...

A bit of extra to the above - the added weight, if external to the fin, needs to be a good shape. I did see a few years ago a guy who had added weight down below that was an unshaped block. The...
03-10-2021, 01:19 AM
Replies: 26
Views: 749
Posted By mfr02

It was common practice in my old trade to check...

It was common practice in my old trade to check the meter or test lamp before use. The example that was held up was the case of a guy who was recovering an old dead cable, checked with a meter,...
03-09-2021, 01:45 AM
Replies: 26
Views: 749
Posted By mfr02

A is plain old Amps. "Everyday" current. mA is...

A is plain old Amps. "Everyday" current.
mA is 1/1000 Amps. Light usage figure to avoid creating confusion using fractions. And for a marketer, "2300mAH" sounds more impressive than "2.3AH".
ɥA is...
Forum: RC Sailboats
03-08-2021, 02:43 AM
Replies: 23
Views: 5,099
Posted By mfr02

Without a close fitting lid to keep it out, or...

Without a close fitting lid to keep it out, or some means of draining it to the outside world, yes it would. But only until it gets to the level of the hole where the pushrod exits. Then it will...
03-08-2021, 02:25 AM
Replies: 26
Views: 749
Posted By mfr02

368 watts/12volts is a tad over 30A. The 400ɥa...

368 watts/12volts is a tad over 30A. The 400ɥa doesn't sound right for a near stall of a 1/2 HP motor. It's nearly half a milliamp. On 12 volts, that is about what you might measure via sweaty...
03-07-2021, 02:42 AM
Replies: 26
Views: 749
Posted By mfr02

I recall reading that back in the day. Its a...

I recall reading that back in the day. Its a 1999 publication, I don't know if yours will be an updated issue. While many of the basic principles remain, the market has moved on considerably.
03-07-2021, 02:34 AM
Replies: 1
Views: 206
Posted By mfr02

Hard to comment on a 560 motor, having never come...

Hard to comment on a 560 motor, having never come across one.
If a 6 volt motor was used and the batteries in parallel for longer run time, the alleged 320A ESCs are remarkably cheap, There is a bit...
Forum: RC Sailboats
03-05-2021, 02:16 AM
Replies: 28
Views: 2,545
Posted By mfr02

Using modern materials, one way might be to use...

Using modern materials, one way might be to use bathroom silicone sealant. loosely wrap the lid in cling film, put a bead of sealant round the lip of the deck hole, apply the wrapped lid firmly,...
03-05-2021, 01:43 AM
Replies: 2
Views: 339
Posted By mfr02

Presumably fixed by a pair of bolts through the...

Presumably fixed by a pair of bolts through the transom. I would be inclined to clean up the surface plastic where it ripped out and cover both sides with thin sheet aluminium (got empty soda cans...
Forum: RC Sailboats
03-04-2021, 02:30 AM
Replies: 28
Views: 2,545
Posted By mfr02

A very pretty boat. Should look good on the water...

A very pretty boat. Should look good on the water and go well. Just a personal thing, I would be strongly tempted to lose the stanchions and side ropes. Letting sails in and out is always fraught...
Showing results 1 to 25 of 500
 


 
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