jet drive rescue boat

[alan nobleParticipant @alannoble83536]

Hi everyone, I am new to this forum and I thought that maybe a few of you would be interested in one of my latest projects. I am currently building a 1:10 scale fast jet drive rescue boat. She comes out at 54" long and fully batteried up and ballasted weighs 15kg. I fitted 2 graupner 40mm jet drives which are powered by 2 x 720w brushless motors. Here are some links if you would like to take a look at it in action.
This is the boat running on 12v http://uk.youtube.com/watch?v=gLRKH9_MKfI
This is the boat running on 24v http://uk.youtube.com/watch?v=Qa5wBkClicI
This is the boat from standing start to full power http://uk.youtube.com/watch?v=Jn2QxbhaJUs
Let me know what you think. Any questions I will be more than happy to answer. This boat has now just been launched in 1:16 scale for modellers who are not into the big stuff. The 1:16 comes out at 33" long.

kind regards
Alan<!– / message –>

[alan nobleParticipant @alannoble83536]

here is some video of the new 1:16 model.it will be on the water at beale park this weekend 4th and 5th oct.i will also have the big one there

http://uk.youtube.com/watch?v=-_CkwoFhwJk

kind regards

Alan

[Penny LeeParticipant @pennylee76979]

Hi Alan,

I am slightly interested because a smaller 20 inch vosper mtb of mine obtained your 24 volt speeds with a standard 540 motor on a 6 volt 4amphour lead acid battery.Great fun to sail on calm water.  

Since then I have considered trying out one of these huge 6 foot speedboats but with an electric rather than an I.C. motor I reckoned there is an almost exponenential rise in power needed with bigger size but now we have Brushless motors and Lipos.

I have no experience of brushless motors and know these questions are a bit off topic but……….

• I take it you are not driving the 720w motors anywhere near their full capacity?
• What type and capacity of batteries in each model and duration of sail for both models?
• What motors powered the 1/16 boat?

I am guessing you may be a speed freak or have sailed fast electric so:-

• You churn up a lot of water.Have you ever noticed a difference using large brass props geared down in fast electric boats? (not these jet drive ones off course)
• What difference over standard or surface drive props do the jets make?

Thanks in advance

Lee Penny

[alan nobleParticipant @alannoble83536]

1:10 scale

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