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[HS93 (RIP)]

the Flash looks like a Nice lake PLUS there is a nice Pub 2.1 miles away called the Trevour Arms that does nice sunday lunches.

peter

[red181]

ok for all the staticians amongst you, here are some test results for real time testing with various props. Recordings where done with eagle tree data logger, and all runs where only approx 1 min long, trying to avoid battery deteriation, until the end. I recorded the ambient temp, (4 degrees) weather, and wind, so that all future tests can be compared acurately, as I will be shortly fitting another motor. The rest of the info is from the eagle tree, its really amazing what you think "looks fast" actually isnt

PROP                                        GPS MAX SPEED             AMPS               MOTOR WATTS

44.5mm 4 blade cleaver                    17.15 mph                  46.60                   1061
40.0mm 3 blade cleaver                    16.80 mph                  42.30                    996
45mm 3 blade standard                     17.00 mph                 51.70                    1185
x 50.0mm plastic 2 blade                   20.60 mph                 75.10                    1660
x 52.5mm plastic 2 blade                   21.75 mph                 69.17                    1457
x 55.0mm plastic 2 blade                   21.41 mph                 63.97                    1388 (motor very hot!)

I wish I could find a way of dumping the graphs and stats on the thread, its very interesting seeing how batteries recover after a fast "blip" and the relationship between amp draw, I will work on that!

[dbninja]

Paul
looking forward to seeing you run the new motor set up in the Huntsman.... just hope changing the motor hasnt ruined the fabulous noise that boat makes!.......   it even sounds fast

it should help you with your testing now you have the fantastic lake at St Helens club to really open her up without fear of hitting anything

keep up the good work, hope you are taking lots of photos and notes on your new big fireboat twin brushless set-up... could be the start of a new build thread from red181?

nice

db

[red181]

thanks DB, makes a big difference being able to open up and not end up in  a corner!

New motor fitted now, but I doubt it will be over with this, I never feel settled! Its a Turnigy 800kv outrunner. Over the last 2 yrs brushless knowledge has come on leaps and bounds, and people are getting good results with lower kv motors, and as the align motor was getting a bit rattly, I thought it was time to try a lower kv, bought second hand off fleabay, so if successful I will get a better quality one.

The theory being, lower kv, more torque, able to swing a bigger prop. After some significant testing over the last 3 weeks, and changing gearbox ratio, I have arrived at 16 teeth on the driveshaft, and 14teeth on the motor shaft, 1.14:1.

1:1 was ballistic, 25.55mph on a 55mm "x" prop, but everything was way too high, amps almost 100 max, hot motor, but geat fun

1.25:1 delivered 21mph, so no real improvement on what I had, but this seems (for the time being anyway!) ok, although motor was hot after stopping, cool when running, must be something to do wiith all the heat build up when the outrunner stops turning, so I need to come up with some sort of "after running" cooling system device.

video shows first run  with a 50mm "x" prop that delivered 21.5mph, then second run with a 55mm "x" prop 23.85mph, 1589 watts and 80 amps, so its within tolerance of this motor, and very fast!

http://youtu.be/e5-YmmElIfk

[treeboa]

looks well  . looks a hell of a lot faster

[red181]

well a got a propshop prop, after much discussion, not a cleaver, but a fast scale, its 53mm diameter, really nice prop, tried it last week, but its too big

1/2 throttle, the boat nearly rolled over. Very interestingly, the boat was much quieter running, it has sounded quite rattly and noisy lately with the Turnigy motor. I changed back to a smaller 50mm "X" prop, and it was noisy again.

Up to now, top speed was 25.5mph, at half throttle I was at 21mph, with less amp draw, so cant wait for the 50mm diameter that on its way.

Excellent service from Propshop by the way, its a free exchange

[Martin (Admin)]

( Remember to use "Family Safe" when using  • Add image to post ( PostImage.org
- otherwise we get porn ads appearing with your pictures which frighten most people.... much less the horses!)

[Norseman]

Hi Paul

Peter put me onto your thread - I've just spent the evening reading / watching it. Fantastic from start to finish, both highs and lows, and certainly inspiring for the likes of me. That is one insane ride - a big enough straight and you might just have a 'Back To The Future' moment. 

Re Bond clip - watched that and noticed a 'Puppet On A Chain' boat chase clip too - enjoyed both 

Thanks for a riveting read.

Regards Dave

[ghost123uk]

Hi all, glad this thread is still alive and kicking 

Gresford Flash ( next to the Pant Yr Ochain) less than 13 miles away, a lovely place and a nice group of chaps. the Wrexham model engineering society have their 5" gauge track next door 

http://rogersonhome.co.uk/index_files/Page331.htm

the Flash looks like a Nice lake PLUS there is a nice Pub 2.1 miles away called the Trevour Arms that does nice sunday lunches.

peter

Sadly that lake mentioned above is electric only 

Mine is still languishing on a shelf in the spare room (motor with after run oil of course :) )

Must find somewhere near me to run it !

[red181]

Paul
looking forward to seeing you run the new motor set up in the Huntsman.... just hope changing the motor hasnt ruined the fabulous noise that boat makes!.......   it even sounds fast

sadly, the replacement motor, whilst delivering nearly 25mph with the new propshop prop, has lost that very unique noise it makes, which does not unfortunately come across on the videos, it is still however really pushing the set up to the limits, and run time is way too short for even me!, so for the last few months, I have been selling everything I could get my hands on to generate some funds to buy a real nice, but stupidly expensive motor , just cant stop meddling, and probably won't till I either sink or wreck the boat

[Norseman]

You should just let it slip to Peter that you don't think he could possibly build a better motor than what you are looking at - He'll just bust a gut proving you so wrong     

Regards Dave

[red181]

I know, he loves a challenge, wait till you see the big 4 foot fireboat, what he has done with that is a work of art!

[Norseman]

I figure you will be feeding those boats on raw meat before too long 

Dave

[fletch62]

thats one boat that would love fleetwood lake in the rough

[HS93 (RIP)]

I figure you will be feeding those boats on raw meat before too long 

Dave

no just the driver , you should see what he does on his birthday, he has fireworks and dancing (looked a bit like morris dancing)

Peter

[Welsh Wizard]

Red181 I have those motors on an arun lifeboat turning 75mm props direct drive running 24v and get on avarage 30mins run times out of her,I have had to stop running it at the Mayhem evnt as the lake is not long enough for her as she is to fast,absoloutly awsome motors......have you tried it on direct drive or even upping the voltage



Dave

[Norseman]

Any video Dave?

Dave

[Welsh Wizard]

Sorry no I havnt,all I can say is it's a sight to see a 56lb boat wave hop I have seen it compleetly out of the water passing thru it's own wake frightened the proverbial out of me.


Dave

[red181]

Hi Dave,

thanks for input, I have sort of reached my level of understanding with this boat, I have been criticised, and praised, as its really a bit of a monster, clsoe attention to detail to replicate the "real thing", yet stupidly over scale speed. If I did it again, I would make it much lighter, there is a lot of "over engineering" with the ply construction, and things like light control units are unecessary weight, such as the lexan windshield, It would have been much lighter in thin plasticard, its almost like bullet proof glass, James Bond would love it!

There are also the financial constraints, it takes time to save up for the gizmos that make it work at such extreme settings, and now 2 1/2 years on the batteries,  two 5000 mah 3 cell lipos are due to be replaced, very expensive!

I can't up the volts past 22.2v, esc is almost at the max, maybe its the fact you have twin screw? I think that would be the answer for this boat, at 23mph the hull on single screw is almost becoming unstable with torque roll. I have considered some sort of trim tabs, but wondered if they would look a bit ugly? I was at 1.14:1 so almost direct drive.

Fleetwood looks great for this boat, it loves the choppy water, and I would love to get some "air" under it!

Anyway, Santa has been a bit early, this is the new (first time for a brand new motor and FINAL motor, ther next rebuild will be twin screw!

[red181]

That is one insane ride - a big enough straight and you might just have a 'Back To The Future' moment. 

88mph! now I have  atarget to aim for, might need Llanberis lake for that one, and a rescue boat on hand, deep water scares the life out of me, takes some nerve to put your boat on a lake that you know is bottomless!

you should see what he does on his birthday, he has fireworks and dancing (looked a bit like morris dancing)

personal joke, it was my birthday 3 yrs ago, I blew up an expensive castle creations esc that day, the biggest bang you have ever heard from a model boat, and a fantastic smoke display, I can still smell that electrical smell of death in the boat, death never leaves this boat!

[Norseman]

Hi Paul

Re criticism. I thought the point of a hobby was to enjoy it - and you have. You enjoyed the build and now you are enjoying pushing the limits of it. You have an ongoing interest that many won't achieve after a build. Good on you 

Dave

[red181]

watch this space, twin screw coming at end of year, cant get this to go any faster on single screw, just cant help myself!! Ha ha , a boat is NEVER finished!

[triumphjon]

ive noticed less roll with my three huntsmans by having them on twin shafts , i ll always remember my first 47" huntsman 31 with a hp61 glow power tipping to wash the deck if i cornered her hard ! my current pair being a small 31 " huntsman 31 with aft cabin on twin brushed 777 motors and a spear with twin brushless eflight park 450 motors in her !

[red181]

still here! twin screw conversion will be after my fireboat twin screw build is finished (my correct forum name is red181, its in naval section), then  a PCF, and a jetboat, so I reckon summer 2013 will see this boat pulled apart for twin screw, same setup as the fireboat with shafts being direct into motors, I think!
 
Batteries, some posts ago I mentioned the turnigy 3 cell 5000 mahs were getting tired, well one expired not long ago, I have used (after extensive research) gens ace. These are so far much better than the turnigy ever were, holding charge better, and the c rating seems more understated, than turnigy's overstated figures, still relatively budget price, pity the overseas postage charge is such a killer! 

[red181]

still not done the twin screw yet, the Fireboat build took so long, Huntsman is showing some fatigue now, its been knocked about over the last few years, here is a great video from a couple of week ago, it is duplicated on the model boats section, but I thought it needed to be here also!
 
3 camera views, its a great ride!
 
 http://youtu.be/VCJhEzLOv7M