RunRyder RC
WATCH
 1 page 740 views Post Reply
Home✈️Aircraft🚁HelicopterGasser Model RC HelicoptersOther › Predator Gasser w/G26 Hanson Pro - Need Suggestions on TUNE!
09-09-2006 01:24 AM  14 years ago
Topic Vote0Post 1
rfaster

rrApprentice

CA Bay

MyPosts All Forum Topic
Predator Gasser w/G26 Hanson Pro - Need Suggestions on TUNE!
Would appreciate any input on this - I'm about at my end point with trying to get this thing tuned to FLY -- Over 7 Hours turning needles, starting motor - walking back - spinning up- engine DIE etc....

I picked up this kit used - was told the Heli and Hanson Pro had 2 gallons of break in fuel/oil run and it was just used for AP. I was told this kit ran good - no issues etc... If I fill the tank to the STOPPER I notice that i get leaking out of the stopper... (not sure if this will help ts or not)

I have another Predator gasser with std G26 and am able to tune - it runs great etc...

I ran 1/2 tank with Amsol 2.5 ounces to gallon - then when I spoke to Hanson he said I should up that to 3.5 - (Both mixes result in the exact same behavior).

I start the Hanson G26 at 1 1/2 on both needles (per Mr. Hanson) - and the engine sounds good - picks up speed and right when it gets to lift-off the motor just QUITS - or drops into IDLE... if I richen the high needle in 1/8th increments - it gets a little better - and lets me hover for a minute maybe 1.5 minutes before dropping back into Idle. I continue to increase by 1/8ths until Its too rich to fly. I have spent over 7 hours just adjusting the needles from one turn out - and 1/8th incremetns on both needles until its too rich to start.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 03:02 AM  14 years ago
rcadd1ct

rrElite Veteran

Richardson, Texas

MyPosts All Forum Topic
I started with 1 3/8 turns on both needles.

I run 2 oz of amsoil per gallon of camper fuel. (I have a hanson 26 pro 3D).

Make sure you are not getting a pcm lockout and it going to idle.

Also remove the air filter and see if this helps.
-RCA .......... Making Cuisinarts Fly!!!!!!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 04:14 AM  14 years ago
rfaster

rrApprentice

CA Bay

MyPosts All Forum Topic
I wish it was the radio... When it shuts down into idle - or just stops I still have full control - and have the canopy off so I can see the throttle servo. The cut-out seems as if it does not have enough fuel -- since at 1 1/2 on both I get great rev-up on l needle - good headspeed and then right as I get light or as I start to lift off - or if I'm very lucky when I'm a few feet up it just goes back to idle... I then richen up the High end (by 8ths) - and it helps get me from 10 seconds - to 30 - then to a max of 1.5 - then its so rich that it wont get past L needle.

I started it the first couple of times w/out the stock airfilter -- but never got hovering... that's an easy one to try.

I think I keep looking for something SIMPLe - since the previous owner was flying this - said it flew fine for AP etc... I can't imagine how he was able to fly it fine and I can not get more than 1.5 minutes --- so I assumed it was something super simple that either got knocked in shipping etc... causing the issue.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 04:16 AM  14 years ago
rcadd1ct

rrElite Veteran

Richardson, Texas

MyPosts All Forum Topic
If you are flying with the stock air box, make sure the choke is not closing on you.-RCA .......... Making Cuisinarts Fly!!!!!!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 04:18 AM  14 years ago
rfaster

rrApprentice

CA Bay

MyPosts All Forum Topic
Yep - stock airbox - The open/close is quite firm and I have checked this as well - Early on I thought I was flooding it -- when in reality I was knocking the switch when I pulled the engine. I paid careful attention to the open/close and it was full open during the "shut down" conditions - all 20 of them today I have a K&N type on my other predator G26 -- I will give that a shot next time I hit the field - I even swapped plugs today with no results.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 04:26 AM  14 years ago
rcadd1ct

rrElite Veteran

Richardson, Texas

MyPosts All Forum Topic
My guess is that you are loading up the engine with a very restrictive air cleaner.

Try it without the cover and the needles 1 3/8 out.

With the stock air cleaner me 26 was at under 1 turn out on the high end. The air cleaner was so restrictive that there was not enough air flow to let the carb work correctly.
-RCA .......... Making Cuisinarts Fly!!!!!!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 04:30 AM  14 years ago
GREYEAGLE

rrElite Veteran

Flat Land's

MyPosts All Forum Topic
Check your plumbing
Are you running 3- lines ?
Vent or over flow
Line direct to carb intake port
Return line.

Clunk plugged
Black rubber fuel 1ines
Intake screen of carb circut plugged from fuel jug contamination.
Is your fuel pump shredding rubber from the impellor ?

Sounds like she just burn's the carb reserve up and does't replentish -

Maybe the fresh fuel de gummed the carb circuits.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 05:16 AM  14 years ago
rfaster

rrApprentice

CA Bay

MyPosts All Forum Topic
RC - air cleaner test is easy - I have a K&N on my #2 predator that I will swap for next test - and set needles back to 1 3/8ths

Greyeagle -

I'm running 3 lines (looking at both predator's) and they have the same lines going in the same parts of the motor/fuel tank. I tested out the over-flow today -- filled tank to top - and fuel came out the top - thru tube and out bottom.

Clunk - assume to find out you need to take out the Rubber circle in the tank?
Intake Screen - Assuming if I take off the carb I will be able to look at the screen?

Not sure what "Fuel Pump shredding rubber from impellor" - again these are my first gas engines -


It will run ALL DAY (well ok - many minutes) if I don't lift off -- its only when she gets light -- sounds almost like switching gears ( assume this is the hand-off from L needle to H needle) that it drops back to idle or quits. If I stay on the ground I think it would run until the tank was empty.

Again -I really appreciate the troubleshooting steps!!! My only other real gas experience is with DA 100's and 150's and to tell you the truth I have never had to touch a needle on those!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2006 07:21 AM  14 years ago
Disciple4123

rrKey Veteran

USA

MyPosts All Forum Topic
I would focus attention to the screen in the carb, remove the one center screw in the carb side, left side when looking at the carb mounted, and clear that screen out. It may pass enough fuel for 30% throttle, beyond that gets restricted.

The metering lever on the other 4 screw side of the carb can also get bent in or out, checking it can be more challenging, it is one of those "don't mess with it until your sure it needs adjustment" things. If it is off it will affect transition throttle response, possibly causing what you see.

Review this post reference for carb service info...

http://www.runryder.com/t244929p1/

You may also wish to remove the H needle, check for debris. Although I have not seen this happen, I can envision how the H circuit can get fully clogged, and the L circuit could function.

Also check for a loose throttle plate, far less likely, but when the screw backs out of them they can flop around at certain throttle positions, usually leading to a stuck fast idle though.

I fixed my gasser problems, I sold it. But I do miss it as well.

Hope you get it sorted.
SHARE  PM  EMAIL  Attn:RR  Quote
09-10-2006 03:18 AM  14 years ago
GREYEAGLE

rrElite Veteran

Flat Land's

MyPosts All Forum Topic
How do you get fuel from your jug.
Jug contamination is a pretty common and can effect any gas model - planes helies - boats ect.

Fuel jug mounted fuel pumps wear after a period within the pump itself.

Usually the pump has some form of rubber impellor - a tube or rollers - or some mechcanical means to force the fuel. It wears out due to use and the crud goes directly into the carb.

As they say - junk in your jug

Hence plugged up carby.

Theirs a tiny stainless screen - press fit into one side of the carb - under the above mentioned cover. Take a look and see if its clean and shiney.

If not

It will come out if you bend a tiney hook on a pin and lift it out.

Clean it - and put it back in" only if you see its plugged.

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
09-10-2006 04:59 AM  14 years ago
rfaster

rrApprentice

CA Bay

MyPosts All Forum Topic
Disciple4123 - will try these steps and post the results - thx!

Grey - I use Jersey Modeler fuel jugs - 1 gallon's for the Gasser Heli's - both of my 1 Gal's are brand new - and have filters on outside etc... I hope to get time tomorrow to take the carb screws off to check the mesh.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 740 views Post Reply
Home✈️Aircraft🚁HelicopterGasser Model RC HelicoptersOther › Predator Gasser w/G26 Hanson Pro - Need Suggestions on TUNE!
Print TOPIC

 2  Topic Subscribe

Monday, November 30 - 1:55 am - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online