RunRyder - Starting my Hawk IV

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Century Hawk - Falcon - Raven - Predator > Starting my Hawk IV

Fuj
Senior Heliman
Location: Fairfield, CA

I've got almost a gallon thru my Hawk IV - OS32 - love it. I flew today without my training gear for the first time - no problems. Then tonight, I went to fly again - and I was able to get up for a few minutes and then I landed. In idle, it died before I could walk up to it. I have not been able to start it since. I thought it was running a little rich but now the engine is a bit more broken in, perhaps it needed some adjusting. I even put in a new glow plug for measure. I made sure no fuel was in the engine and let it sit for a while after going over it thoroughly. I took it out and tried to start it and it got going for about 30 seconds then it died. Couldn't get it going again. I'm at a loss - any advice? I know this isn't a Hawk problem - it's an engine issue.

Thanks in advance.
Dan

07-15-2002 Over year old.

HOMEPAGE

nook
Heliman
Location: Saskatchewan, Canada

Starting Problems

Dan, I have been having problems getting my Hawk III to start up. Have you watched the fuel line to the engine? In my line I can see the fuel moving toward the carb and then back. I can't figure it out. Took the tank apart and changed the clunk line, checked the tubing and everything out. Still no go. It looks like the tank is vapor locked. But pull the lines off and blow through them and all flows well.
If anyone can help me out that would be great.
The engine is a Super Tiger G .34 with the factory century muffler on it.
Dean

07-15-2002 Over year old.

the Wasp
rrProfessor
Location: Vt

what plug ??

Helis need a hot plug because they run so rich !!,,,,,

try the OS8 plug !!

jim

07-15-2002 Over year old.

Toddp
Heliman
Location: Spokane, WA

Hot Igniter also

I also had a problem getting started. It turned out to be my igniter was not getting hot enough. I was using an igniter connected to a power panel and keeping the amp needle centered in the green. I finally pulled the plug and checked and found that the plug was glowing...but not super hot. I cranked up the amps into the Red Range 4.5-5 amps and she started firing every time.

Todd

07-15-2002 Over year old.

whirly
Heliman
Location: california

Starting Hawk IV

It is a possibility that it may be flooded. Remove the glow plug from the engine. Put the starter on the helicopter an try starting it for approximately 3 seconds, this is just to get rid of the fuel in the engine. Put the glow plug into the ignitor to make sure it ignites and to burn off any excess fuel. Replace the glow plug back into the helicopter then try starting it.

07-15-2002 Over year old.

oldfart
Elite Veteran
Location: Vancouver, Canada

Engine not starting

These two stroke engines are fairly simple, if they are getting the proper mixture of fuel/air and have a good glow they will start. Try removing the plug and testing for glow. If you are using a remote glow attachment, insert the plug, ground it to the engine and check for glow. While the plug is out turn the engine over to blow out any excess raw fuel in case it was flooded (sometimes while transporting it back to the pit area raw fuel can flow out the tank and into the muffler through the exhaust pressure line.) This can also be used to see if any fuel is getting into your cyclinder (hold your finger about 1" away from the glow plug hole and it should get a bit wet when turning over with a starter. Then check that the carb is still securely attached to the engine (make sure both screws that attach it are there). If it is loose or has a screw missing, it will cause air to be drawn into the cylinder and make the mixture too lean to run, even with the needle opened to the point of dropping out.

07-15-2002 Over year old.

the Wasp
rrProfessor
Location: Vt

I had a problem with a remote glow attachment (a TUNDER TIGER product/junk),,, now I use a Century remote glow attachment, it's a much better product !!

Jim

07-15-2002 Over year old.

nook
Heliman
Location: Saskatchewan, Canada

Problem Found

Well I found the starting problem with my hawk. It was the fuel filter. I just put it on the Hawk before the weekend. Some how it was vapor locking and not letting the fuel pass. It is now off my heli and I will stick with filtering the fuel as it goes into the heli from the jug.
Now once I get the engine reset to the right settings all should be fine. This has been frustrating to find and cut my practice time to nothing and my tinkering time to the max.
Thanks for the help.
Dean

07-15-2002 Over year old.

ncostes
Veteran
Location: US

I found out about the missing carb retaining screw the hard way

Engine wouldn't start until 1/3 or 1/2 throttle, then would start and run uncontrollably, not responding to reducing throttle until down to idle.

One of the carb retaining screws was missing.

Fuj - do you know what we're talking about - there should be 2 phillips head screwsd on your carb, one on each side of the heli - make sure they are both still there.

They are M3.5x5 screws.

07-16-2002 Over year old.

Fuj
Senior Heliman
Location: Fairfield, CA

I got her running again - I think it was just too hot yesterday after all my starting mess. I reset the needle and got her working great. I just need to start figuring out what is too lean and what is too rich.

Going to start some nose-in tomorrow - back to the training gear.

Thanks for all the advice -

Nick - I went thru my engine manual and I do have both screws in the carb - thanks again for your help!

Dan

07-16-2002 Over year old.

HOMEPAGE

ncostes
Veteran
Location: US

Don't give up - tuning the engine can be the most frustrating thing. One day mine was running ok, the next day I couldn't get it started and tried for about an hour then gave up in disgust.

Eventually I decided I would do it systematically - I took the carb off, learned how the needles actually work, aligned the low end needle as per the manual, put it back on, and then just started from closed low end needle, 1.5 turns high needle, and just opened low end 30 degrees at a time till the engine started. Then kept turning it until I got a good low end, then proceeded with the instructions in the manual.

Now it fires up right every time, and I have both high and low end tuned right. Remember - it should start right up when you blip it with the starter - if it doesn't something is wrong (mixture, plug, or ignitor - or throttle

)

It will be a great feeling when you can just fire it right up consistantly

07-16-2002 Over year old.

Fuj
Senior Heliman
Location: Fairfield, CA

Thanks, Nick. I also just switched to 30% from 15% so I'll have to richen it up a bit and tweak it some more. What do use to gauge correct mixture?

Also, I'm sure you have been thinking about your next heli as I have. What are you leaning towards? I'm using a JR 652 so I'll be upgrading my radio also eventually. I have been looking at everything and I'm leaning towards a 9CHP and a Fury but not sure if I'd want an extreme or a 60. Just curious what your thought process has been.

Thanks!
Dan

07-16-2002 Over year old.

HOMEPAGE

ncostes
Veteran
Location: US

Here was my thinking....

After my first crash, I ordered a 2nd hawk IV kit because Century had a good deal ($219 WITH GYRO and shipping included). So I ordered a 2nd airframe for backup (they happen to have that deal going on now again!)

Well - then I started thinking maybe I want a bigger engine, and I posted this question...

http://www.runryder.com/showtopic.h...t=bigger+engine

Oldfart replied with a parts list for upgrading my hawk IV to 50 size - including a new gear to load the engine, and longer blades, a falcon boom, etc.

I'm still flying the 32 hawk, and I'm putting the 50 size hawk mutant together. With these 2 birds, I don't really see a need for a 60 or bigger until much later on when I am a much better pilot.

Dwayent flies a Rap50 - he's a very skilled pilot (came in 2nd at the MHA funfly this year in expert category) and apparently the 50 is good enough for him - so it should certainly be good enough for you and me for a while

Oldfart pointed out that the Hawk IV with a 32 is about a pound lighter than a lot of other 32s so it should be a real rocket (and mine is now that the engine is tuned properly).

As far as tuning your engine - the instructions in the os manual really are pretty good - they have a good flow chart to go through at the field as you are making adjustments.Ray's helicopter manual also has some great sections on that with pics of the carb inner workings etc. to make it real clear.

If you still have problems after going through that flow chart (or if the flow chart doesn't make sense) post on the engine group and you'll get help - I'll help but there are lots of others on here who are more knoledgable about these glow engines.

Nick

07-16-2002 Over year old.

jwood
Heliman
Location: Fayetteville Ga.

Starting problems

Fuj, I known what you talking about, you see the fuel run to the filter
then back , and the engine want start, finally you give up.
I've be doing this since I was 14yrs old ,now 48, I just got back
into the hobby what a mistake!!!! Flew copters in the 80's.
Try this , hold your finger over the exhaust while trying to crank your
engine your see fuel going into your carb. Sometiime you have to
choke your engine even when it's hot. IT's not your filter.

07-21-2002 Over year old.

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Century Hawk - Falcon - Raven - Predator > Starting my Hawk IV

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