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HelicopterGasser Model RC HelicoptersOther › Predator tail shaking up and down
12-27-2008 04:50 AM  8 years agoPost 341
rbort

rrProfessor

Franklin, MA - USA

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Just checked in about 10pm, back in Kingston!

Back and forth on the island, I came back from Santa Cruz today. I had a chance to shoot some aerial shots of the house I was staying at with the 450 and they came out awesome! I know you guys want to see all the stuff, I need some time to process them and upload them to runryder. I'll get them on there in the next few weeks, I promise, after I get caught up with everything back home when I return!

Meanwhile I had a good conversation with Hugh tonight after checking in and the heli is ready to go! I do hope the ring seals, if not we might have to try to flip it as a last resort to test fly it before I leave Jamaica. He will eventually get a new ring, but for now we have to work with what we got!

I hope it will fly so I can give it the "full treatment" of adjustments and make it fly perfect for Hugh before I leave. Will try tomorrow afternoon as is and if no luck then on Sunday with a flipped ring if Hugh wants to try that.

Good work on all the fixes, looking forward to another go at it!

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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12-28-2008 01:45 PM  8 years agoPost 342
AceBird

rrElite Veteran

Utica, NY USA

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I would expect the engine to run but I don't suspect the engine will be golden for any length of time. Flipping the ring? What does that do?

Ace
What could be more fun?

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12-28-2008 03:03 PM  8 years agoPost 343
zorba

rrApprentice

Montreal, Quebec,​Canada

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I don't think is a good idea to flip the ring.
From my experience as an old mechanic. When we replaced the rings on a engine the rings had a mark to indicate which way is up. I don't know if those rings are designed the same way or not.
But if you flip the ring, it will not seat properly in the cylinder.
You might create new problems.
My 2 cents
Cheers

3-450's,rex500ESP,rex600G,Rex700G,Raptor60G,FreyaCW-EXII, VarioEC155, Logo20, Cessna310,CL-415,

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12-29-2008 01:35 AM  8 years agoPost 344
turbogti

rrVeteran

St. Andrew, Jamaica

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Well guys we tied to get the heli running today but no go.

Compression was leaking, you could hear it hissing while cranking the pull starter. The compression on the engine was low, one slow pull on the pull starter ratified this.

We got the engine started it flew well until raja noticed the darned V3 coming loose, Raja landed and i re-tightened the V3 but she refused to start. We let her cool and tried again, it started but now it would lose power whenever Raj attempted to increase the throttle.

This problem got worse to the point where she didn't even want to lift off.

I'm definately going to do what Al said and try a new piston ring.
I will e-mail him shortly and hear what he has to say.

edit: i'll take your advice and not flip the ring thanks guys.

****Predator Gasser SE - She's Ready to rumble ***

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12-29-2008 05:34 AM  8 years agoPost 345
CNCjunkie

rrVeteran

Kauai (The Garden​Isle), Hawaii - USA

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Just my opinion, but I would send the engine to Al.

again, my opinion and from past experience with large engines (15 years in the automotive repair industry) If you replace the ring, the cyclinder needs to be deglazed or the new ring will not seat.

Not sure about such a small engine though, but I would send it out just to be sure.

Just another crappy day in Paradise....Aloha!

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12-29-2008 12:43 PM  8 years agoPost 346
turbogti

rrVeteran

St. Andrew, Jamaica

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CNC believe me that would be an easy option for me but the cost to send this engine up to the states would be very costly, estimated u$125 also i will be charged a premium to bring in back in to the island, estimated $190

Al told me just changing the ring and breaking in the engine again would work so i'm keeping my fingers crossed that this will work.

****Predator Gasser SE - She's Ready to rumble ***

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12-29-2008 03:27 PM  8 years agoPost 347
CNCjunkie

rrVeteran

Kauai (The Garden​Isle), Hawaii - USA

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And I thought shipping to\from HI was high.

If Al's ok with it, then you should be ok.

Hope you get it up and runing soon.

Just another crappy day in Paradise....Aloha!

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01-12-2009 05:08 AM  8 years agoPost 348
turbogti

rrVeteran

St. Andrew, Jamaica

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Still waiting on that ring from Hanson, snail mail is the worst thing ever.
Anyway i pulled down the heli today to get to the piston and this time i noticed the ring was stuck in the piston slot, "Stuck Ring".

I got it off safely so now i wait for the new ring and gasket

****Predator Gasser SE - She's Ready to rumble ***

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01-14-2009 02:48 AM  8 years agoPost 349
turbogti

rrVeteran

St. Andrew, Jamaica

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Ok i received the ring and gasket today from Al @ Hanson.

I was able to get the new ring on easily, with instructions from Al, stating to look at the ring carefully and place the side with the Chamfer around the circumference down.

Side with No Chamfer

Side with Chamfer

Gasket and ring ready to be installed

Installed Ring

Total time to install ring and refit frame onto engine support as well as associated fittings.

1hour 12mins

The installation of the ring into the cylinder took roughly 20 mins, This job should take 3 min or less, but it was my first time with a new ring so i was extra cautious, anyway the piston glided into the piston without any problems, just make sure that the piston and recieving cylinder are oiled and ready.

This weekend i'll test her out, can't wait.

****Predator Gasser SE - She's Ready to rumble ***

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01-14-2009 03:43 AM  8 years agoPost 350
Excalibur

rrKey Veteran

Destination: Earth

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Cool! Good job Turbo. . . We want a full flight report after you get her back in the air.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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01-14-2009 04:16 AM  8 years agoPost 351
turbogti

rrVeteran

St. Andrew, Jamaica

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Yea well according to Al its a whole new break in period for me so it will be a while.
4.5oz oil to the gallon to seat the ring cycling the engine up and down...

Keep you all posted

****Predator Gasser SE - She's Ready to rumble ***

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01-14-2009 04:36 AM  8 years agoPost 352
rbort

rrProfessor

Franklin, MA - USA

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Good work!

I hope you'll be able to attract plenty of people at the park - in other words you'll be flying for a long time!

Belive it or not I need to go out to the driveway now and do a final sweep of leftover snow/ice. Temp is 33 now but will be dropping to 20 by morning and should be 12 by tomorrow at 5pm. Then down to single digits it will be a while before we see "freezing point" 32F/0C again...

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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01-18-2009 07:03 PM  8 years agoPost 353
turbogti

rrVeteran

St. Andrew, Jamaica

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Got her started but..

Well today i took her out to run the first tank through.
Took a bit but she started, i pulled her about 3 times on kill then moved to idle and tugged twice nothing i didn't want to lean the needles i have them both at 1 1/2.
So i applied some throttle, she started on the first tug and was smoking and running pig rich. (I'm at 4oz Havoline TC-W3 oil and 90 octane fuel)
Anyway i ran her at "Idle" for roughly 4 min, the clutch was totally disengaged.

I checked around and everything looks ok, temps on the engine case was 116F (Couldn't get to the fins)

I then moved the throttle up a bit to move over to a fast idle, the engine was bucking with soo much richness
Anyway i took her down to idle and then fast idle and back to idle, at this point i decided to check the exhaust screws for tightness, as roughly 10mins had passed. I walked over and the first thing i saw was oil "apparently" leaking from the head gasket

I'm going to pull the engine (Yet again!!) and re-check for tightness.

The saga continues.. Stay tuned next reporting session to see what else will go wrong

****Predator Gasser SE - She's Ready to rumble ***

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01-19-2009 02:40 AM  8 years agoPost 354
turbogti

rrVeteran

St. Andrew, Jamaica

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Ok gasket issues sorted now i'll try and start her up again after work one evening.

That x-frame mod really makes short time of dropping out the engine

****Predator Gasser SE - She's Ready to rumble ***

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01-20-2009 01:19 AM  8 years agoPost 355
rbort

rrProfessor

Franklin, MA - USA

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Ok great -- Lets see how it finally works​out!!!

I do want to send you a picture with the snow, maybe I can take one tomorrow morning. 15 inches in a couple of days, I got some pretty good piles out there!! They said on TV today as of now we have as much snow as we get in an entire season. So this year is definately a + year

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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01-24-2009 11:01 PM  8 years agoPost 356
turbogti

rrVeteran

St. Andrew, Jamaica

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First tank .. DONE!!

Ok i finally got a chance to start her up today.

Man with the needles at 1 1/2 she's reaal Rich... spitting all over.

I was able to do roughly 3 heat cycles running the engine at idle and a fast idle.

I checked the head gasket and no leaks
The tail was kicking like an angry bull

Tomorrow i'll try another tank and lift off trying to avoid loading up the engine.

I noticed some white shavings around the tail bevel gear, this has started since i adjusted the bevel gear further up on the crown, i'll be checking that one out tonight.

Enjoy the photos:

Oil on main blades

Oil on paddles

Oil out back

****Predator Gasser SE - She's Ready to rumble ***

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01-24-2009 11:05 PM  8 years agoPost 357
Excalibur

rrKey Veteran

Destination: Earth

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Good job Turbo. . . now it's just a matter of putting some time on her to break it in. You definitely will have some oil splatters on the machine with rich needles, but it is really critical for that first gallon or two. Good luck and keep us posted.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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01-25-2009 12:34 AM  8 years agoPost 358
CNCjunkie

rrVeteran

Kauai (The Garden​Isle), Hawaii - USA

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turbo,

I know you’re being cautious, which is good, but oh, what a mess! Looks like a nitro bird...

I remember 1-1/2 was way too rich for me when I broke in my 260, could hardly get it started and would not idle low enough for the clutch to be disengaged. I ran 4.5oz per gal and my needles were at 1-3/8 for the first gallon.

What I also found really helped with the mess of break in was to install an exhaust diverter. It kept the oil directed away and not all over the back side of the muffler, tail and supports.

During breakin and slow and easy FF, there was a low pressure area created behind the V3 that caused the oil to load up all over and drip off. The diverter eliminated that problem also.

Just my 2 cents.

Good luck with the break in.

Just another crappy day in Paradise....Aloha!

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01-25-2009 12:59 AM  8 years agoPost 359
AceBird

rrElite Veteran

Utica, NY USA

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Oil on main blades
There is no need to be that sloppy rich when you are flying.

Ace
What could be more fun?

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01-25-2009 01:01 AM  8 years agoPost 360
turbogti

rrVeteran

St. Andrew, Jamaica

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Thanks Xcal i'll keep you posted.

CNC the needles are really rich and i'm at 4Oz for this gallon.
The engine idles at full trim but i can give her some throttle input and the clutch doesn't grab.

I had an exhaust diverter, hmm where could that be.. anyway the entire mess took me like 2 mins to clean up fully so i'll continue without the diverter, unless i find it.

i think i'll see how she flies tomorrow before i go to 1 3/8, if she flies ok i won't go to 1 3/8 until tank 3 or 4, safe than sorry. Plus i'm following Al's method for break in.

Also the temps on the case were like 140 F could be a combination of the rich mixture or CAP's Fan.

****Predator Gasser SE - She's Ready to rumble ***

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