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HelicopterMain Discussion › New HydraTork dual motor starter at HeliProz!
10-21-2004 02:40 AM  13 years agoPost 1
sultan68

rrApprentice

Broomfield, CO​Elevation 5420'

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Check it out...

Looks kind of like a T-Maxx starter! Or perhaps a Savage 21 Roto-Start! But, hey, if it can do the job better than the DynaTron, then perhaps it will be worth it?

HydraTork starter

Chris

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10-21-2004 02:50 AM  13 years agoPost 2
pilotError

rrKey Veteran

Long Island, NY

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Starter

A buddy of mine has one and it starts his Raptor 90 - YS91 no problem. It does kill the batteries pretty quickly - he bought or they came with 1500 Mah batteries (not sure).

Sounds like the pocket starter I used to have.

Mike...

Good Judgement comes from Experience. Great Judgement comes from Bad Experience.

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10-21-2004 06:49 AM  13 years agoPost 3
pip

rrApprentice

Baltimore, MD

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Truth in advertising?

I love Helipros’s descriptions!!!!!!!!!!!!!!!!!!!!!!!!!!! Anything with a Marvikk label on it is the best widget they have ever flown……

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10-21-2004 01:09 PM  13 years agoPost 4
I3DM

rrProfessor

Israel

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looks nice, but where do the batterues go ? 2 x 6 cell packs... ?

www.liorzahavi.com

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10-21-2004 02:13 PM  13 years agoPost 5
Dr.J

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Ontario, Canada

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Be aware, though ...

if it has no trouble spinning over a flooded 90 sized engine, then, it likely would have no trouble breaking the crank (if it were flooded enough).

Sure seems reasonably priced, though ...

John

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10-21-2004 02:32 PM  13 years agoPost 6
raptorheli2

rrElite Veteran

rip off britain and​no changing it

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if the dynatro won't spin it with decent batts then i wouldn't want to put that starter near it. i think you might see cranks getting damaged if you used that when flooded. Which with the PS is easy to do.

cheers


www.waterfoothelis.com

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10-21-2004 03:14 PM  13 years agoPost 7
eric_b

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Denver, CO, USA

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if it has no trouble spinning over a flooded 90 sized engine, then, it likely would have no trouble breaking the crank (if it were flooded enough).
I was thinking the exact same thing.... If an engine is truly flooded then it just won't turn over, regardless, without breaking.

My question is: When are they going to make pull starter for 50 & 90 sized engines, so we don't have to use starters ????

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10-21-2004 03:47 PM  13 years agoPost 8
cjw

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UK - Cheshire

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My question is: When are they going to make pull starter for 50 & 90 sized engines, so we don't have to use starters ????
Wouldn't think so. Just more weight and something else to go wrong. I don't mind the system we have now - very simple and effective.

Clive

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10-21-2004 05:58 PM  13 years agoPost 9
Jarold C

rrApprentice

Somewhere near​Pittsburgh, PA

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My question is: When are they going to make pull starter for 50 & 90 sized engines, so we don't have to use starters ????
They don't make them because of the weight. There used to be some aftermarket pull-starters for the .46, but they never sold well.

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10-21-2004 06:03 PM  13 years agoPost 10
Dr.J

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Ontario, Canada

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A pull starter is a bit of a gimick ...

imagine what it would be like to hang on to a heli, while you're reefing on the pull start line of a 90 sized engine ... somehow, I just can't see it.

John

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10-21-2004 06:43 PM  13 years agoPost 11
SLiebl

rrApprentice

Lancaster, PA - USA

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A pull starter is a bit of a gimick ...

imagine what it would be like to hang on to a heli, while you're reefing on the pull start line of a 90 sized engine ... somehow, I just can't see it.
I don't agree... a friend has a Predator SE gasser with a pull start... that's a 90 size heli and the pull starter is held in place for starting, then removed for flight. So there is no extra weight. Starts in 2 or 3 quick pulls. Slick, if you ask me.

-Steve

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10-21-2004 06:52 PM  13 years agoPost 12
JKos

rrProfessor

Redondo Beach, CA

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> imagine what it would be like to hang on to a heli, while you're reefing > on the pull start line of a 90 sized engine ... somehow, I just can't see
> it.

I don't have to imagine; I do it every time I start my Predator Gasser which has a 1.4 cu in engine. Starts in two pulls the first flight of the day and usually one pull after that. Like SLiebl said, the starter comes off after use.

I remember years ago there was a wind up starter available. It had a big 'ol spring in that you wound through a gear reduction. Press a button and it would start just about anything. It was really well built and reasonably compact, not a toy by any means. Anyone know what I'm talking about?

- John

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10-21-2004 06:56 PM  13 years agoPost 13
darwin

rrNovice

USA

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I don't agree... a friend has a Predator SE gasser with a pull start... that's a 90 size heli and the pull starter is held in place for starting, then removed for flight. So there is no extra weight. Starts in 2 or 3 quick pulls. Slick, if you ask me.
That is comparing gas vs. glow. They have different compression ratios.

-Darwin

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10-21-2004 07:02 PM  13 years agoPost 14
JKos

rrProfessor

Redondo Beach, CA

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> That is comparing gas vs. glow. They have different compression
> ratios.

They sure seem to put a similar load on an electric starter. It takes a hefty starter to turn over the gassers too. My MA Pocket Starter can hardly do it when I've tried.

- John

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10-21-2004 09:49 PM  13 years agoPost 15
FAA

rrApprentice

MIlford CT

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Another thing "YOU DONT REALLY NEED !"

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10-21-2004 10:07 PM  13 years agoPost 16
SLiebl

rrApprentice

Lancaster, PA - USA

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That is comparing gas vs. glow. They have different compression ratios.
No, I wasn't comparing gas to glow. The comment was made by someone that they couldn't see using a pull start on a 90 size heli because of it's size. That had nothing to do with gas vs glow.

-Steve

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02-08-2005 06:22 PM  12 years agoPost 17
lfalsetto

rrKey Veteran

COLORADO

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Someone out there has a dynatron starter with a carbon fiber holder for two rc car batteries. Does anyone know the source for that holder?

Thanks

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02-08-2005 06:25 PM  12 years agoPost 18
wolfdad

rrKey Veteran

Southern Maryland

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Pip,
Dang! You noticed that too! DBK and Maverik....

wolfdad sends.....

"There are those who have...and, those who will" IRCHA #2117, AMA #70068, Turbine Waiver #105

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02-08-2005 08:16 PM  12 years agoPost 19
angelob

rrKey Veteran

Stoughton WI

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Someone out there has a dynatron starter with a carbon fiber holder for two rc car batteries. Does anyone know the source for that holder?
http://www.ronlund.com/Merchant2/me...ct_Code=HHI7507

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02-08-2005 08:47 PM  12 years agoPost 20
RappyTappy

rrProfessor

North Denver,​Colorado

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Why your Dynatron doesn't 'seem' to work...

In reality a Dynatron starter is more than enough to start a 90. The mis-conception that it doesn't work is because of this fact. The dynatron needs to spin a little bit before it hits all the poles in the electric motor to produce its torque. The Dynatron is like a tubocharged 4 cylinder engine. It has no torque off the line, but once it starts spinning up, hold on!
If your engine has a little bit of fuel and is already more than half-way to its compression stroke, it won't allow the Dynatron to spin up to full torque potential. A simple test will show this. Put 24 volts to your Dynatron and hold the start wand and press the button. You will notice that you will be able to hold the Dynatron from spinning with ease. Then, allow the Dynatron to spin and then try and stop it, believe me you won't it.
The key is, if you reach under the fan and turn the engine clockwise till it stops at the reverse compression stage so that the engine is allowed to spin a bit before going under compression, the Dynatron will start it with ease, even on 18 volts.

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HelicopterMain Discussion › New HydraTork dual motor starter at HeliProz!
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