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Author Topic: Huntsman motor  (Read 2887 times)

funtimefrankie

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Huntsman motor
« on: February 13, 2008, 04:27:20 PM »

I have a Graupner speed 700 turbo in my GF 34 inch Huntsman, driving a 45mm 3 blade brass prop with 9.6 volts.
This motor is used because that's what came with it when I bought it part built.
Its seems heavy, although the boat is fairly nippy I feel it could do better.
Any Suggestions? please.
Frank
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banjo

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Re: Huntsman motor
« Reply #1 on: February 13, 2008, 05:41:32 PM »

 O0
I got the same set up 'cept the prop size..

Go down to a smaller prop....

You'll get more revs for you amp and it will go quicker!!

Promise..

 O0

PS
I got a graupner 2 blade black "fibreglass"  in mine which I gradually "modified" smaller & smaller.
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DickyD

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Re: Huntsman motor
« Reply #2 on: February 13, 2008, 05:54:49 PM »

Frank ask Stavros because no matter what anyone else says to use he will insist the set up on his Huntsman is the best. O0 ;)
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banjo

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Re: Huntsman motor
« Reply #3 on: February 13, 2008, 06:07:19 PM »

Then I suggest a contest!!!!!!

(He said boldly throwing down his gauntlet)


 ;D
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banjo

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Re: Huntsman motor
« Reply #4 on: February 13, 2008, 06:15:52 PM »

I also have a Huntsman and run a MFA850 water cooled running a 55mm prop and a single 12vgell cell and yes it planes but not spectacularly,what you and I have to consider is it is a heavy boat designed fro a petrol engine that is it's problem

Stavros

Gell cell!!
Its no contest....He is running a snow plough!!!!!!

 {-)

 O0
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Stavros

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Re: Huntsman motor
« Reply #5 on: February 13, 2008, 09:36:27 PM »

Frank ask Stavros because no matter what anyone else says to use he will insist the set up on his Huntsman is the best. O0 ;)

hang on DickyD if you had read what i had put on a previous Huntsman thread,you would have noticed your slight boo boo,I am also looking for an alternative set up


Stavros
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DickyD

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Re: Huntsman motor
« Reply #6 on: February 13, 2008, 10:09:16 PM »

Ooooops !!!!! :embarrassed:
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funtimefrankie

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Re: Huntsman motor
« Reply #7 on: February 13, 2008, 10:12:40 PM »

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DickyD

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Re: Huntsman motor
« Reply #8 on: February 13, 2008, 10:19:35 PM »

I had one like that on my PT boat but I found it went faster with a finer pitched prop, also 2 blade. O0

Mind you that photo wasn't on here when I wrote this. It looks fine as is O0
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Stavros

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Re: Huntsman motor
« Reply #9 on: February 13, 2008, 10:35:38 PM »

Well i would leave it well alone it seems that it fly's


Stavros
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banjo

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Re: Huntsman motor
« Reply #10 on: February 13, 2008, 10:56:25 PM »

 ;D
 Go for a 2-bladed, of carbon fibre reinforced nylon. Propeller 40mm
by Graupner

but certainly not from EBay
 O0

PS
...then.....go to a 12 volt pack!!!!...12 Volt 2200mA NiMh 2/3 Sub C Power Pack ( GP ) (Thanks ModelPower)
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funtimefrankie

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Re: Huntsman motor
« Reply #11 on: February 14, 2008, 08:49:27 AM »

I'm going for the ebay prop, only the price of a pint , I'll put the Graupner one on the shopping list for next time I'm at a show or decent shop.
The 12 volt pack may have to wait as it would involve a new charger as well.
Thanks
Frank
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martno1fan

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Re: Huntsman motor
« Reply #12 on: February 14, 2008, 03:48:51 PM »

why not try a brushless motor and lipo battery?, lighter more powerfull and longer runtimes  O0.
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explorer750

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Re: Huntsman motor
« Reply #13 on: February 14, 2008, 06:21:37 PM »

While not try running it on two 7.2v ni-mhs giving you 14v my deep v runs this and it flies.
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funtimefrankie

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Re: Huntsman motor
« Reply #14 on: February 14, 2008, 10:37:21 PM »

why not try a brushless motor and lipo battery?, lighter more powerfull and longer runtimes

Limited budget

why not try a brushless motor and lipo battery?, lighter more powerfull and longer runtimes

I'll have to check the max voltage the ESC allows
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explorer750

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Re: Huntsman motor
« Reply #15 on: February 15, 2008, 10:56:40 AM »

What esc are you using? The electronize range can take that voltage easily.
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grasshopper

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Re: Huntsman motor
« Reply #16 on: February 15, 2008, 12:12:33 PM »

More to the point - where do you get a pint for 1.25?

have a look at these:

http://www.ripmax.com/11index.asp?category=050-010-080&selectedtab=050

Whenever I get to a particular model shop in Newark that imports Graupner stuff - and have money to spare, I buy loads of different props - they're not that expensive and you need to experiment rather than do calculations
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funtimefrankie

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Re: Huntsman motor
« Reply #17 on: February 15, 2008, 09:23:34 PM »

More to the point - where do you get a pint for 1.25?
I was counting in the P&P = 2.20, price of a pint in "The Guest House"  Southport....nice O0 O0 O0
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Jonty

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Re: Huntsman motor
« Reply #18 on: February 16, 2008, 10:32:37 PM »

  1.32 for a well-kept pint of Sam Smiths in the Halfway House in Queensbury, conveniently next door to my shop.
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funtimefrankie

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Re: Huntsman motor
« Reply #19 on: February 17, 2008, 04:12:48 PM »

Are well you learn something every day. My shaft is different thread to the eBay prop. :( Should have bought the pint.....

Also the current prop is 40mm :-\
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red181

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Re: Huntsman motor
« Reply #20 on: March 14, 2008, 11:18:47 PM »

My 42" Huntsman 28 has a graupner 700 bb turbo, 12 v,2 x 8.4 3300 nimh's, wired to double voltage, as the nominal voltage goes up to 19.2 volts. I originally ran a 12v 3300 nimh, going up in voltage was a massive improvement. Luckily I have a water cooled ripmax esc that can handle 19.2 v.
THe prop is like the ebay one, 35mm, "s" blade. I have tried "x" blade, as small as 30mm, as big as 50mm, both 3 and 2 blade, the 35mm and 40mm seem to be the best, the 35mm I think is just bordering on too small, as someone told me it was on the verge of cavitating. Its a heavy old boat, all ply, it flies on this combo, right up on the plane, but I only get 12 to 15 mins.

A second set up was graupner 9.6v speed race bb. Very amp hungry motor, but at 12v battery pack was almost as quick. I am no expert, but in the testing I have done, you have to push the voltage right up on these graupner motors, then they really come into their own. I'm off to Ellesmere show sat to get a battery pack made up, to 16 cells, 2x 8 packs to mount either side of the prop shaft, then I am at the max of the esc and motor! It will prob catch fire! ( then my aerokits Fireboat can come out!)
Hope that helps.
PS....I think Graupner are at tyhe Ellesmere show, perhaps if you can get there they can help?

Paul
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Stavros

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Re: Huntsman motor
« Reply #21 on: March 14, 2008, 11:27:03 PM »

Before you go spending your money try Ian at Component shop he will do you a pack up at a very reasonable price,add in Traders section



Stavros
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andyn

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Re: Huntsman motor
« Reply #22 on: May 22, 2008, 11:42:51 AM »

Why don't you try stuffing a merco .61 in it, thats what I did  O0
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grasshopper

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Re: Huntsman motor
« Reply #23 on: May 22, 2008, 12:18:36 PM »

The way things are going, it's getting to the stage where Li-Po power is a reasonable cost alternative to Ni-Cd, NimH and in some cases Lead Acid.
Brushless motors are also dropping in price where they should be considered over brushed motors - especially when the power / weight ratio is an issue.

Getting boats like the Huntsman to perform for any decent length of time has always been an issue if doing it electrically - now finally, there is a viable alternative.
Mind you, for true scale enthusiasts - the ultimate should be two four stroke engines.......Oh that sound..
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