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>> Home > Videos
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Showing page 1 of 36   |   Jump to page: 1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36  


Sea Scout 'Jessica' Sea Trial - at last! - Posted: 1 day ago by RNinMunich
mdlbt.com/42099   >> Permalink
Part 1. Ideal conditions; nearly 30°C, cool Bier at hand😜
Sea Scout built by Dad in the early sixties. Renovated and dragged into the 21st century over the last several months 😉
See Build Blog 'Sea Scout 'Jessica'' for details!
Motor: Propdrive 2830, 1000kV, 30mm 3 blade Raboesch prop. Quicrun 16BL30 (30A) ESC with BEC.
Tested with 3 battery types, all started with 99% measured capacity-
1. NiMh 4.2Ah 7.2V, nom. 408gm.
Result: Speed sedate (OK 😉scale river cruising!) No planing.
Max current: 3.6A
End status V / capacity left: At end of short run ca 3 mins. 7.78V 99%.
2. 2S LiPo 4.0Ah 7.4V nom. 257gm.
Result: Speed still sedate but due to lower batt weight at least the forefoot came out of the wet stuff! Max current: 4.1A
End status V / capacity left: At end of short run ca 3 mins. 8.25V 93%.
3. 3S LiPo 4.0Ah 11.1V nom. 315gm.
Result: Now we're getting somewhere!!😁
Good speed, manoeuvrability and planing 😊 Max current: 7.5A
End status: 11.95V 74% after several long runs, ca 20 mins total.
Estimated (extrapolated) endurance on a 4Ah LiPo around one hour - mostly 'full bore' - 'Pedal to the metal man' 😊

See also: https://youtu.be/oMUlSOaAREM The competition!
https://youtu.be/zPgYicA0yGw Final run. (Beer was getting warm😁)

Cap'ns log entry:
Boat dead-weight w/o battery: 1.8kg.
Spray rails to be added!😲
Slight list to port to be trimmed.
Rudder servo to be reversed!!😲
Keel protection to be added: some scratches and flaking from stony sloping shore 🤔
Summary: much as expected👍 Forget anything less than 3S.
Anyone want to buy a batch (4) of new 2S 4Ah 45C Lipos? 'One careful owner'! Happy boating people, Cheers Doug 😎
PS Many thanks to Camera girl Gisela 👍
Recorded in 1080p HD.
Response by RNinMunich on the 17 hours ago
Thanks Donnie, hope my results help others who are treading similar paths 😉 Forgot to mention: after each run I 'tested' the motor temp with my fingertips - very slightly warm to the touch but nothing to get excited about so no need for cooling arrangements 😊
Response by canabus on the 15 hours ago
Hi All
Looking at the boat and the specs, a few things jump out at me.
The battery is far to big and heavy for the boat(a 3S 2000-2650 mah).
The motor no guts( a Prop Drive V2 2836-1800kv).
The prop 2 blade 30-32mm.

Hope this helps, sorry to upset your setup.

Canabus
Response by RNinMunich on the 15 hours ago
Interesting Canabus! Not quite what you recommended last year 😲 If you now think the Propdrive 1000kV has "no guts" why did you recommend it to me?? Thanks for spoiling my mood 🤔 As far as I'm concerned you just devalued your currency!
I'm happy with her as she is, balance and stability is OK and performance, endurance vs current drain is much more lively than she ever was in 55 years.😊
After all, she's supposed to be a Broads Cruiser and not an Offshore Power Boat.😉 I'm not into racing either.
From time to time I'll fiddle with fittings detail and cockpit on Jessica.
Time to get on with other projects now. Doug 😎

Tumlaren - Posted: 5 days ago by Pelleseglare
mdlbt.com/41982   >> Permalink
Scratch built by master Ivve in 1:5 scale, Tumlaren designed by Knud H Reimers and said to be one of the most beatuful sailing yachts in the world😁

soling sailboats - Posted: 6 days ago by GARTH
mdlbt.com/41922   >> Permalink
finally some nice weather for a sail boat race at Hamilton sod farm pond . May 20 2018 my soling is the last in line & has a watermelon deck or maybe it's salmon

Scudder - Posted: 9 days ago by Grumpy1949
mdlbt.com/41854   >> Permalink
scratch built old Vic Smeed plan. needs either bigger motor or more pitch. should go better once it gets on the step

Genesis 9000 - Posted: 18 days ago by MouldBuilder
mdlbt.com/41651   >> Permalink
A short video of the first trial of my Genesis 9000 Offshore Power Boat. This is a boat to use whilst I build others.
The trial was seriously hampered by a faulty main switch. The insides must have fallen apart during transportation. I did manage to get an electrical contact to get around five minutes of the trial. The boat ran well but I will have to adjust the rudder to give more movement. Just after the video ended, the boat hit a ripple whilst turning and flipped over. No water entered the hull so all was good, except the switch now refused to work at all. The trial was ended and unfortunately will now have to wait until I return to my river in August.😤
Response by RNinMunich on the 18 days ago
Hi Peter
very unusual problem with the switch😲
You could temporarily replace it with a bullet connector to continue trials.
Glue one end down so that you can quickly unplug the battery one handed. OR: simply short circuit the switch and use the fuse as the 'switch'!?
Boat looks a little heavy / tail heavy? Maybe shift some weight a little forward to give more stability? Happy trialling, cheers Doug 😎
Response by Donnieboy on the 18 days ago
I agree with the weight being shifted forward a iittle bit.Bow high in a catamaran will catch too much air causing the boat to flip.All it takes is a good gust of wind.Good speed on the boat.After trials you'll have a good fast boat.
Response by MouldBuilder on the 17 days ago
I have brought the wiring home we with me. I will change the switch and take it back with me in August.
I must admit that I thought the stern was a bit low in the water. To evenly distribute the weight, I put in two batteries as suggested. I will try to move the batteries forward to change the centre of gravity.😊

Huntsman "John" - Posted: 19 days ago by Novagsi0
mdlbt.com/41628   >> Permalink
More running in trials, burning fuses out, and complete radio outage and bumping the bank. However some progress made on levelling it out, full speed cannot be reached whilst trying to video by my self. 😎 The Captain "Dennis The Menace" is not a good omen, twice he's got in trouble, yesterday the cabin was flooded up to his waist.

Vintage Aerokits Fire Boat - Posted: 21 days ago by CB90
mdlbt.com/41580   >> Permalink
Vosper Fire Boat (Crash Tender) a Vintage Aerokits Model 1:16 scale and is 34 inches long, produced from 1950's to 1970's.
This model uses a Vintage Ripmax Bullet 30 DC motor that can run on 24v here it is only on 14.4v it becomes lively on 16.8v.
Response by rolfman2000 on the 20 days ago
It's nice to see vintage Fireboats running anytime. But running with original motors is unusual, and makes this even nicer. Thanks for sharing, as I am halfway through a rebuild of an original Aerokits boat as well. I think mine had a 10cc glow in, but not for long, as its not full of goo like some are. Im putting an equivalent brushless motor in, and hope to have it wet by the end of summer. Best wishes, Dave W 😊
Response by wrongglue on the 17 days ago
It's Eaton Park in the fine city of Norwich.😊
Response by cormorant on the 17 days ago
We are holidaying in Happisburgh for the next couple of weeks. Is Eaton Park your club venue? If so we would like to visit.
Steve

CB90 - Posted: 23 days ago by CB90
mdlbt.com/41534   >> Permalink
Model undergoing sea trials after painting, note rudders are too aggressive.

Command Boat 90 (CB90) Stridsbåt 90 H is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet.

Speed: 40 knots (74 km/h)
Draught: 0.8 m (2 ft 7 in)
Length: 15.9 m (52 ft) Overall; 14.9 (48') Waterline
Builders: Dockstavarvet

Complement: 3 plus up to 21 troops and equipment
Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges
Response by reilly4 on the 23 days ago
Great looking model. It seems to perform like the real thing.👍
Response by rolfman2000 on the 20 days ago
Extremely good manoeverability. And a great looking model too. What more can I say. Thanks for sharing

CB90 - Posted: 24 days ago by CB90
mdlbt.com/41501   >> Permalink
CB90 Model boat, 52 inches long performing 360 degree rotation on its own axis.

The Combat Boat 90 (CB90) is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet.

Powered by two 9.6v Graupner 700 turbo motors (no-longer in production).
Two Mtroniks Viper Marine 25 is a Brushed Speed Control designed specifically for use in RC model boats, it has a 25Amp motor limit and has proportional forwards and reverse functions

Tug Serenity! - Posted: 25 days ago by figtree7nts
mdlbt.com/41471   >> Permalink
Tug Serenity bathtub trails circa 2015!
Response by Donnieboy on the 25 days ago
Excellent.Nice colours you chose.Love to see it running in the open when the weather cooperates.
Response by figtree7nts on the 24 days ago
Thanks, Donnieboy

I plan to take her out when the weather gets better!
I'll make another video of her. maybe take my barge along as well.
My Brooklyn tug may not be completed for this season!


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