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>> Home > Tags > brush

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Prop shaft bearing by Dave M Fleet Admiral!   Posted: 22 hours ago
Useful info on how to fit a bearing. Do yo intend to provide any protection from water ingress or are you relying on the oiler alone? It would be useful to know the specs (max revs) for the bearing, especially if you intend to fit a brushless motor.

Hovercraft by RNinMunich Fleet Admiral!   Posted: 1 day ago
Many thanks Dave and Brian, I guess Brian's craft is much bigger and heavier than mine; 56x30 cm. Spec says weight 1.3kg with motors fitted but without batteries and RC gear. It came with a 9cm diameter 3 blade ducted fan, 13x? two blade thrust prop and a pair of 400 size brushed motors, the mountings for which limit me to 28/30mm diameter brushless. When I hauled the kit box down from an upper shelf to investigate I found the packing list and spares price list in both Deutschmark and Euro, i.e. circa 1999/2000!! Planning well ahead for the retirement 😉😉 In mine there are no rudders! The whole motor/prop mount is turned. Will see how it goes with that and maybe mod it later with rudders depending on how easy it is to control - OR NOT😲 many thanks for the tips 👍 Doug

3D sanding discs. by Colin H. Fleet Admiral!   Posted: 1 day ago
Lucky I've still got my old Bohler, paid £19-99 for it in 1998. Used on many projects including 4 real boats that my dad renovated in the last few years of his life. So far it has had about 200 hours of use and never let me down. I have replaced the brushes once so far but have 2 more sets just in case. 2 years ago I bought 50 sets of discs from a model shop that was closing, the entire stock, but am down to last 2 sets. So hopefully a new supplier shortly if shipping costs and import taxes not too high. Cheers Colin.

Too Powerful Brushless ? by Traiderman Sub-Lieutenant   Posted: 2 days ago
Hi all, Thanks for all the advice and info, all very helpful to a newbie! i certainly will install prop shaft supports on the 5mm shaft and get the correct size motor! Thanks Again Graham

Too Powerful Brushless ? by BOATSHED Admiral   Posted: 2 days ago
Hi Graham, As DaveM says, he has worded it much better than I did. Hope it works out for you this time. Happy Boating. love to see some video of her on water once you have sorted her out.

Too Powerful Brushless ? by Dave M Fleet Admiral!   Posted: 2 days ago
Hi Graham You do have to support the prop shaft close to the bearings at each end. This is vital if you are to avoid a slight imbalance developing into an uncontrolled whipping and as you have experienced, damage to the shaft assembly. The support needs to be firmly attached to the hull and shaft close to the bearing to provide both vertical and horizontal support. The supports should ideally be within 1/8" of the bearings. If you are reinstalling the prop shaft then, as others have suggested, it may be an opportunity to move the motor towards the stern and use a shorter shaft, but still providing support near the bearings.

Going brushless after all! by Dave M Fleet Admiral!   Posted: 2 days ago
I use two Turnigy 2830 750kv brushless 35amp car type escs 11.1v Lipo and 30mm brass props. Glad to hear you are using a wattmeter to check the loading.

Dumas 1203 Coast Guard Lifeboat (RNLI Waveney conversion) by Dave M Fleet Admiral!   Posted: 2 days ago
The 12v I used was small and didn't last long. I see from your next post that you have decided to go brushless and LiPo and you won't be disappointed. The battery warning devices are essential for LiPo type batteries and I am sorry if I lead you to believe they were required for SLAs.

Going brushless after all! by Skydive130 Fleet Admiral!   Posted: 2 days ago
I’ve decided to go brushless instead of brushed with a view to adding brushless at a later date. I had a turnigy motor and Hobbyking ESC sat in the spares box and have ordered another pair. Will run this on 2S lipo to start with and go 3s if needed, depending on the watt meter results?

Too Powerful Brushless ? by pmdevlin Fleet Admiral!   Posted: 2 days ago
I think you might need pointing in a direction, so I had a quick look on Hobbyking, and this motor is the sort of thing you can use, although this particular one would need you to swop the shaft around, this is just a guide, other s will no doubt add comment, its the right size, 5mm shaft, right kv and watts. https://hobbyking.com/en_us/turnigy-g15- style='background-color:yellow;'>brushless-outrunner-810kv.html brushless esc https://hobbyking.com/en_us/hobbyking-90a-boat-esc-4a-sbec.h... you don't need the high amp capability, but its reversing, programmable, water cooled, and has an sbec, so the main battery power this 5 mm shaft, move your motor to the centre section meaning weight distribution is more central, and you can now use a shorter shaft, and get a couple off plastic "x" props, I would say 40 to 45mm will be the one. This will give a good speed, and you can power on 3 cells or 4 cells lipo, get higher c rating (40c or more) and higher mah so you have fuel in the tank available https://hobbyking.com/en_us/turnigy-battery-3000mah-4s-40c-l... This is just a guide, a starting point, as I feel you are unsure where to start, others with more knowledge will come in regarding this, having experience with lipo, brushless, 3 foot ply boats, and esc's, depending on budget, this would be the sort of thing I would be getting.

Too Powerful Brushless ? by BigAlio Sub-Lieutenant   Posted: 2 days ago
Hi Graham its at each end you need support to stop any whip on shaft

Too Powerful Brushless ? by RNinMunich Fleet Admiral!   Posted: 2 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😎

Too Powerful Brushless ? by Traiderman Sub-Lieutenant   Posted: 2 days ago
hi Dave M, well that was good info on the Lipo's i was going to put them in Parallel But certainly won't now! i will use one and then swap over when necessary as you suggest,Thanks! As far as the 500 watt motor is concerned, i have not purchased it as yet but as a previous post stated that i need a smaller wattage than 500 , i will carry on looking for a smaller wattage and low KV size motor, although all i seem to find are are very powerful ones! even on the web sites named in the post but i will phone them in the morning and ask. the Boat does have a keelson, a piece of angled wood below the hull and also one inside the boat and this shows about 1 1/2" of tube either end of the shaft to fit the supports. Thanks graham

Too Powerful Brushless ? by RNinMunich Fleet Admiral!   Posted: 2 days ago
With you all the way down the line Dave 👍👍👍

Dumas 1203 Coast Guard Lifeboat (RNLI Waveney conversion) by Skydive130 Fleet Admiral!   Posted: 2 days ago
Cheers Dave, some good stuff there. Are there smaller 12v SLA than the giant house brick I have in my aerokits Solent? Don’t want to sink it with a huge brick lol. I may look at a brushless conversion at a later date, would be easy enough to swap out the brushed motors and replace. It’s just that I have all the brushed stuff available that was going to go in another model, may as well use that first. I have battery warning devices for my aircraft, but they are lipo only, will have to look for sla types?