Slo mo Shun

[Rick DevonshireParticipant @rickdevonshire]

Hi Bob,

Tell me, do you hold the record for the longest thread running in the forum?

Rick.

 

[Bob Abell 2Participant @bobabell2]

Hi Rick

 

Don`t know who owns the longest thread, but I suppose I`m in with a shout!

 

Still got someway to go yet!

 

 

Bob

[Phil Winks 1Participant @philwinks1]

On the question of longest thread you are currently at c 5875 views with 375 replies and 1st post on the 29-06-09 so app 7 months 3 days. the other thread that I know of that even comes close is Pauls Barrell back with a mere 5289 views, 245 replies and has 12 mths 13 days between 1st and most recent posts so make your own mind up chaps

[Rick DevonshireParticipant @rickdevonshire]

How about us awarding a “Longest Thread” Trophy?

 It could be a bobin wound with a Golden Length of String.

Thinking caps on, what more original ideas can you come up with?

Rick.

 

 

[Phil Winks 1Participant @philwinks1]

Sounds like a grand idea lad. perhaps an annual award with some indicator of the current holder alongside their avatar or perhaps their name in gold one the web editor methinks

[Rick DevonshireParticipant @rickdevonshire]

Thanks dad!

I look forward to reading any ideas put forward.

Rick.

 

[Bob Abell 2Participant @bobabell2]

Having hightech discussions with ACTIONman……..Where to put the High Amp switches?

I suggest `tween the motors?

 

Note the fan mock up too……It may look small, but it peaks at 9000 rpm and it`s blowing aft………….More exit holes will be required, at the back end

 

Exciting stuff, this?………..Bob

[Bob Abell 2Participant @bobabell2]

The prototype fan was tested in the drill at 2800 rpm and it blew all the sawdust off the bandsaw…….But it was more draughty around  the peripherery, which is probably OK for swirling the air around the inside of the hull?

 

It`s worth a try?

 

Cutting edge stuff!……………..Bob

[Phil Winks 1Participant @philwinks1]

This all looks great Bob. At 1st glance the fans look more than adequate, plus when the motors are working hardest you’ll have the areodynamics helping by forcing air into thefor’d intakes. One thing I would like to point out is on aircraft we always make the exhaust vents considrably larger than the inlets as the warm air exiting takes considerably more volume than the cold air entering. Obvious I know but thought it worth a mention. And finally the posty had been when I got home! Thanks again mate these  winch drums are just perfect. Need to get the paint pots out now, and chat with the Action man.

[Len OchiltreeParticipant @lenochiltree67043]

Yipes Bob, I wouldn,t fancy having a circular saw blade wizzing about in my boat.

 

Len

[Bob Abell 2Participant @bobabell2]

Morning, Len

 

I`m going to fit a nice mesh guard round them.

 

What do you think of the fan idea, instead of water pipes and scoops etc?

 

Thanks for popping in……Bob

[Rick DevonshireParticipant @rickdevonshire]

Hi Bob,

A great idea, but will it absorb some of the power and thus significantly reduce performance?

Rick.

 

 

[Bob Abell 2Participant @bobabell2]

Hello Rick

 

Good question…………Going off the electric drill test……..there was no detectable slowing down of the drill speed………..But we`ll have to see when the great day arrives!

 

Today, the lake was still frozen over!…….and right now….it`s lashing down with a goodly crop of snow!

 

At the moment, I`m making large louvred vents at the rear

 

Bob

[ashley needhamParticipant @ashleyneedham69188]

Bob, marvelous as your fans are, I cant help thinking that a more conventional propeller arrangement, with probably only 2 blades (at 9000 rpm) will shift a lot more air more efficiently…..?

 

I think also to be really of any benefit you need to get the air, and lots of it,  in ,and out again. Paint the motors black as well,eh?

 

Ashley

[ashley needhamParticipant @ashleyneedham69188]

Bob, marvelous as your fans are, I cant help thinking that a more conventional propeller arrangement, with probably only 2 blades (at 9000 rpm) will shift a lot more air more efficiently…..?

 

I think also to be really of any benefit you need to get the air, and lots of it,  in ,and out again. Paint the motors black as well,eh?

 

Ashley

[Bob Abell 2Participant @bobabell2]

Hello Ashley

 

I was thinking the very same thing…….an aero prop!

 

Then I thought about a ducted fan blade……..this would look the biz?…..Especially with a tube enclosure!

 

Can we get ducted fan blades off the shelf?….Anybody know about such things?

 

Just cut out the rear vent holes on the hull and now working on the louvres

 

 

Bob

[Phil Winks 1Participant @philwinks1]

Here you go bob 2 pages of edf fans at excellent prices. One good turn deserves another  I’ve used this site on numerous occasions and service is generally very good. just don’t bother with next day del. often standard delivery has it with you just as quick and I’ve never suffered a lost delivery

 

 

Edit Just in case your concerned about durability most of these Items are designed for 1000 kv motors running at up to 22v thats 22000 rpm OMG

Edited By Phil Winks 1 on 03/02/2010 21:54:49

[Bob Abell 2Participant @bobabell2]

Thanks a lot, Pal

 

But. where is it?………lol

 

Must try harder………..Bob

[Bob Abell 2Participant @bobabell2]

This should do the escaping hot air trick from the Hot Turbo motors!

 

Louvres yet to be fitted

 

Bob

[Phil Winks 1Participant @philwinks1]

 Ooops senior moment! sorry about that Bob. Try this

[Bob Abell 2Participant @bobabell2]

Hey!……………They look the bizz, Phil!………eh?…….Ashley?

 

I`m calling the motors…….TURBO MOTORS from now on!

 

This is a very interesting part of the build, we`re at………. at the Mo!

 

Bob

[Paul TParticipant @pault84577]

Hello Captain Bob

 

If you fit ducted fans you might run the risk of compressing the air within the hull and having a ‘red faced’ moment as the hatches blow off during a high speed run.

As you have almost re-invented the ‘cooling fan’ system I would hazard the suggestion that you look again at low energy computer CPU fans….not heavy….use very little power…..move air very well.

 

Looking forward to seeing this little model of yours sailing for the first time.

 

Paul 

[Bob Abell 2Participant @bobabell2]

How`s this for a big bag of swag?……………Oooooooooooo!…………Yes indeed!

 

New fast charger too!……………Oooooooooo!

 

All I need now……..Is to win the lottery!………………Ooooooooo!

 

Don`t tell the wife!………..Oooooooo!

 

Well, you can`t take it with you!…………….Big Spender Bob

[Phil Winks 1Participant @philwinks1]

Lovely looking swag Bob those Turnigy chargers are superb and looks like enough power in the batteries to power a small city. I would imagine the danger of pressurising the hull is very slight as A; the fans are not at the inlet point and B the exhausts are hopefully much larger than the inlets. You could always duct the air from the fans to the exhaust ports, the most likely scenario then is a depression inside the hull sucking the hatches down and lots of cooling air in.

[Bob Abell 2Participant @bobabell2]

Hello there, Paul….Exciting stuff…eh?

 

Thanks for the suggestion of the PC fans……..But there`s really not a suitable space for them………….Anyway, I do like the idea of Turbo Fans………Will probably sound awesome too!

 

I like inventing the wheel!……..Bob

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