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01-23-2010 03:56 AM  8 years agoPost 1
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I finally got my Wally motor. I still don't have the plates to hold the clutch to the frame so I can't fly the helicopter yet, but I went ahead and mounted the motor to the bottom plate anyways just to see how it would look. For fun I tried to use the pull starter to turn it over a few times, and my motor is so incredibly hard to start that I get the feeling I am going to either rip the landing gear off the bottom of the heli, snap the bottom plate in half, or break the string on the pull starter.

Does using the pull starter damage the helicopter? This motor must take at least 25 pounds of pulling force to overcome the compression and turn it over. I can't imagine the string in my pull starter will last for long before it snaps so I am going to go ahead and order another one. Has anyone else had the string snap on their starter? How much force does it take to start your motor? Has anyone broken the bottom plate of their heli trying pull start it? I'm not sure a Dynatron on 24V could turn this motor over, so I really don't see any option other than to use the pull start, but I also don't want to destroy my heli. By chance do these engines get a lot easier to start when they are well broken in?

The Weed Wackers I have owned in the past took about 5-10 pounds of force to start them, but these were not high performance engines.

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01-23-2010 06:11 AM  8 years agoPost 2
lejon

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Las Vegas, Nevada

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Mine isn't and when new, wasn't that hard to pull start. Yours may be mod'd differently, but what I found out was that it was pretty much like my other engines especially with the choked carb.

I did notice that you will go through several starters (pull cord) because the platstic tips that engage the engine wear down until they will not engage.

I have one that is metal and it is doing fine. On the 5th gallon my will pop when choked on the second (partial pull) and then on the first or second non choked pull it is running.

Lejon

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01-23-2010 08:24 AM  8 years agoPost 3
shawmcky

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Isle of Wight,United Kingdom

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It could be
Just the fact that you are pulling against an object that is hard to steady that gives the impression it is harder to pull over.Once mounted in the helicopter proper and you can exert some down force to steady the heli against your pulls it probably wont seem half as bad.Once run it should get easier anyway.Another thing try pulling it over a few times with the plug out,it might just have a build up of lube above the piston making it harder to crank over,like a semi hydraulic lock.

Team- unbiased opinion.K.I.S.S principle upheld here

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01-23-2010 02:16 PM  8 years agoPost 4
Flyon

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Auburn, California

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I still don't have the plates to hold the clutch to the frame so I can't fly the helicopter yet
Are you having custom plates made? What's wrong with the 125-57's that came with the kit.

With a foot on the skid and a hand on the head, the engine won't seem that stiff.

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01-23-2010 02:25 PM  8 years agoPost 5
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I'm using a 14T pinion with a generator, so Miniature Aircraft was supposed to make some custom plates for me last August. Then they got involved with the Fury 55 and my needs have had to take a back seat to that.

I've got the metal insert in my pull start. That's one thing that won't break. At least I hope not.

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01-23-2010 02:53 PM  8 years agoPost 6
rbort

rrProfessor

Franklin, MA - USA

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It shouldn't be
But shawmcky's statement makes sense -- the fact that you are trying to pull start 1/2 a helicopter may make it seem harder. Once you put the top half on and the heli becomes larger and easier to hold then it could feel normal.

On another note your engine may have more compression by design. You might want to just pull the spark plug and see, without it the motor should be very easy to pull through.

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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01-23-2010 04:43 PM  8 years agoPost 7
jschenck

rrProfessor

La Vista, NE.

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I did notice that you will go through several starters (pull cord) because the platstic tips that engage the engine wear down until they will not engage.

I have one that is metal and it is doing fine
This is worth getting if you don't have one.

http://www.davesmotors.com/s.nl/c.8...it.A/id.1466/.f

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01-23-2010 05:23 PM  8 years agoPost 8
smallplanes

rrElite Veteran

S.C. ,SSA

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Jrock how the the piece i made for your starter work? Now you see why i went for the EZ Pull right of the bat and mine is not that hard to pull.

Good Luck

Thanks
smallplanes


Spectra G 26cc
Jewel
Bat 27cc
Trex 700<br

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01-23-2010 06:11 PM  8 years agoPost 9
lejon

rrVeteran

Las Vegas, Nevada

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Jschenck, that is what is on one of the starters and it is working fine.

Lejon

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01-23-2010 11:04 PM  8 years agoPost 10
gramey

rrApprentice

United Kingdom

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jrock, my engine was tuned with a fairly high compression and I gave up on the pull start as I went through two plastic ratchets and a cord. May have been the wrong method, depsite watchings Raja's video, but switched to a Dynatron on 24V's and it spun it over easily. I found that during intial break in it would stall quite frequently and the spin starter saved a lot of swearing and cursing.
The engine has got progressively easier to start as the fuel has gone through it so I've just re-fitted my pull start and generator.

Dumb thumb specialist

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01-24-2010 12:05 AM  8 years agoPost 11
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Smallplanes, the pulley you made is absolutely perfect. You are a very skilled machinist. I'll take some pictures of it mounted when I get the entire heli together. Thank you 100X.

I went to the local Home Depot today to test out the pull starts on the Weed Wackers. The saleperson kept coming over to me to ask me, "Can I help you", but I tried pull starting every Weed Wacker they had several times. Here is my opinion:

The 23cc Weed Wacker is very easy to pull. The weight of the Weed Wacker itself is nearly sufficient to turn the engine over, so pulling with a little bit of speed allows the engine to freely spin.

The 28cc Weed Wacker is somewhat more difficult, but requires only about half the force of the Wally motor.

The 35cc Weed Wacker (with an EZ-pull) requires about 2/3 of the pulling force of the Wally motor, and the EZ-Pull is nice in the way that it makes the "bumps" of the compression less hard on your arm.

So in essence, whatever is inside the Wally motor, the force of compression of the new engine is greater than that of a 35cc stock motor. Hopefull it will loosen up a little, or else my arm will get stronger. Next I need to pull the spark plug and see how easy it is to pull without compression, but something tells me that being hard to start is a characteristic of a high performance engine.

I really hope this heli is worth the wait. It has been nearly 2 years now.

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01-24-2010 11:23 PM  8 years agoPost 12
gramey

rrApprentice

United Kingdom

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Smallplanes, did you just buy a regular EZ Pull start for your Spectra, I ask because I was going to order one and I was told that they won't fit a Spectra??? If they do I'll get one.

Dumb thumb specialist

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01-24-2010 11:47 PM  8 years agoPost 13
smallplanes

rrElite Veteran

S.C. ,SSA

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They will not fit they will hit the bottom of the frame. I had to make the locking part or the part that screws on the crank. I also made a plate to mount my pull start to the heli so mine does not twist on and off. Unless you can get someone to make you an adapter don't buy it because it will not work. Look at my gallery and you can see how i made mine work. They need to make the pull start with a longer threaded shaft on it.

Thanks
smallplanes


Spectra G 26cc
Jewel
Bat 27cc
Trex 700<br

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