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>> Home > Tags > sail

Graupner Elke HF 408 by Dave M Fleet Admiral!   Posted: 2 days ago
Hi Allen Mabuchi no longer list details of your motor and as it is from an ex flyer chances are it has been cooked at some time in its life. I agree it is not easy to check for shorts but a reasonable meter will show any major problems. Your battery sounds fine. Pitch is often marked on the props near the boss but an explanation I have seen on the web: Pitch: theoretical distance the prop travels on each rotation. This is theoretical because water is not a solid medium and the prop slips. 10 to 30% is normal, the lower numbers are found only on hi-performance props, specially prepared. Constant Pitch: the pitch is the same across the entire propeller's working surface, or blade face. Progressive Pitch: the pitch is lower at the leading edge and increases progressively along the trailing edge. Consider a prop that runs in a liquid media with a constant pitch, the tip of the prop rotates faster than the hub. Conversely, if the angle at the tip is lower, the water speed on all prop surfaces will be the same. In this case, the performance is far better. Progressive pitch props offer better planning performance. So if you were to get some graph paper or paper with 1mm markings and set the prop on a shaft over the paper and measure the start point then rotate thro 360deg and measure the finish point this will give you the theoretical pitch. Over the years I have amassed a fair number of props and usually try various before I decide on the best for the model. Try what you have with the 6v battery (looks just right for the model) and see how it sails. From experience I know that this type of model is difficult to get going and all our club models have coarse pitch brass props. Speed will depend on the motor but with a geared motor you should be able to reduce the revs to give scale speed. I look forward to hearing how you progress in a couple of weeks.

Timothy David by Dave M Fleet Admiral!   Posted: 2 days ago
Looking good for its age. Have you managed to sail? Be good to see some on water shots

Hector Read by Dave M Fleet Admiral!   Posted: 2 days ago
A very fine scratch built scale model and the pics show lots of fine detail. Typical of the period and sadly missing from our river scenes. Does the model sail?

finished by dragon Commander   Posted: 2 days ago
Thanks Dave sailed at Southport on Sunday went very well ill take photo next time

Al Khubar 2 by dragon Commander   Posted: 3 days ago
This is A Slipway Kit which I have been rebuilding and finished yesterday working lights, radar, sound system, bow thruster, it sails well.

Graupner Elke HF 408 by Dave M Fleet Admiral!   Posted: 3 days ago
Hi Doug I was referring to watts produced by the battery in the model and the quoted amps of 40. I made no mention of the motor's power rating. The battery looks ok to me and would struggle to give 40 amps with a duff cell. I agree the best course is to suck it and see as is. May sail fine and the motor not overheat.

Graupner Elke HF 408 by RNinMunich Fleet Admiral!   Posted: 3 days ago
Veeery interestink!😉 I always thought that a motor's power rating referred to it's useful power output, not what it scoffs when it is stalled 🤔 Sure 40 x 7.2 = 288W but your full ahead current and watts measurement says the supply voltage was approx 6V. Interestingly some history research tells me that the Elke was originally intended for and supplied with a direct drive 280 motor. Graupner still lists it as such, albeit as 'Sold out' 🤔 Several German build blogs on the net confirm this, although others have also tried different motors, including Decaperms. Kit reviews (mostly on German sites) also mention that she was 'pretty quick' with the 280 motor. Can well imagine, I have 2 x 285s in my 107cm U-25 and she goes like a bat out of hell. 😉 Allen; your result of 40W + and 6.77Amps tells me the motor was running on roughly 6V. (40/6.77=5.91) If you really had a 7.2V pack connected it's got a duff cell (collapsing under load or short circuit) 😲 Carefully strip the pack, isolate the duff cell using a digital voltmeter, cut it out and send it to the great recycling nirvana! Then you have a powerful RX battery😉 Glad to hear you fitted the fuse👍 Leave the rest alone for now and sail her and see. I believe you will be more than happy with the performance and since the ESC is over dimensioned it should have no problems. Happy sailing, Doug 😎

Graupner Elke HF 408 by Dave M Fleet Admiral!   Posted: 3 days ago
Hi Allen Model has come along fine and should look good on the water. Interesting stats especially the stall current. This would rate the motor at 280 Watts with your 7.2v battery Do you know which type of 300 motor you have installed? Many were 6v max but they have versions that go to 24v. There should be markings on the case and you can check the specs at I used two 12v versions in my Billings Coast Guard with 35 mm direct drive props on 12v and they were power hungry, drawing about 4amps each. With your reduction unit I would expect the current to be a lot less than the 6.77 amps you recorded. I agree with Doug's suggestion that you sail it and see. I would suggest a quick circle on the water and then check the motor temp.

Deck Beams and Anchor Port's by RNinMunich Fleet Admiral!   Posted: 4 days ago
Evenin' Fred, just got back from shopping & car-wash, -3C° and still snowing 😡 so no sailing for a while😭 Thinks; must chuck my hovercraft together 😉 Re: marking out - use a medium tip red felt marker and it'll show up on anything (except perhaps red satin pyjamas!!😲😁) If you've got a mini-drill (Dremel or similar) just whiz the paint off where you need to glue with a mini sanding disc. No great shakes, we've all had to do it, especially with renovations. Cheers Doug 😎

Graupner Elke HF 408 by AllenA Fleet Admiral!   Posted: 4 days ago
Elke HF 408 now refitted. Running on a Mabuchi motor geared 2:1, 2mm shaft and 30mm 3 blade propeller. Still fiddling with the ballast but almost ready to sail. Yet to find a suitable fishing net to suit 1:36 scale. Control is via a 40mhz Hitec Ranger 3, Acoms receiver and Chinese 320A fan cooled ESC. As they would say in Cardiff she looks tidy. Many thanks to Tica/BRCarsten for photos of the plans.

HMS HOOD by Trumpeter by jarvo Fleet Admiral!   Posted: 5 days ago
HI Steve, one of my club mates has built the kit with some of the up-grades, looks superb and sails just as well. Not a silly weight either, he is disabled and handels it very easily. The only problem perse, the length of the hull means he has to drop his rear seats to get the beast in. Mark

2018 Boat Race by RichardSReade Sub-Lieutenant   Posted: 6 days ago
Can you confirm the date is the 30th April which is a Friday, also the time, as if in the morning and on the 30th I have a previous appointment and cannot make the morning, a bitter blow as Coate Water is my sailing venue.

Solent RC Model Boat Club at South West Model Show by jarvo Fleet Admiral!   Posted: 6 days ago
Hi Gerry, Easy answer, light machine oil. 3in1 or similar, dont use WD40, also grease can be heavy and cause drag on the shafts, oil all the way, especially if you sail in salt water. Mark

Too Powerful Brushless ? by RNinMunich Fleet Admiral!   Posted: 9 days ago
With respect Graham, A 'Keelson' is always inside the boat / ship. It is a reinforcing beam laid across the top of the keel. Nothing outside the hull. Good luck with your fitting out and much fun sailing, Cheers Doug😎

Help needed, running sheet to main by Donnieboy Lieutenant   Posted: 10 days ago
I guess I should have waited and talked to you first before I posted.The yellow sails will look great on the boat.