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HelicopterGasser Model RC HelicoptersOther › Predator tail shaking up and down
12-22-2008 03:26 PM  8 years agoPost 321
rbort

rrProfessor

Franklin, MA - USA

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Motor

Mcfast: I use the AXI 2212/34 motor in my Jewel.

Zorba: You only need 1 switch, a JR heavy duty switch is perfect. Just wire it as normal through the battery like you didn't have a jewel and plug the jewel into any free channel (no switch) into the receiver.

Man I'm maximizing my benefits on the trip here to Jamaica. I missed 3 snow storms already and none before I left. Cold, icy snow, hmmm...I like the tropics! Zorba, you look really buried with snow!

-=>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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12-22-2008 11:53 PM  8 years agoPost 322
zorba

rrApprentice

Montreal, Quebec,​Canada

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Thanks Raja.
Enjoy your stay, is brutal up here, we are expecting more.

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

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12-23-2008 12:40 AM  8 years agoPost 323
zorba

rrApprentice

Montreal, Quebec,​Canada

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this is what we have right now.bbbrrrrr

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

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12-23-2008 03:41 AM  8 years agoPost 324
litespeed600

rrKey Veteran

St. Charles,​Missouri

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I'd be moving away....as quick as I could.

Bummer for you.

Our 2 degrees here in Missouri wasn't so bad after all. Sure got cold quick/early this year, we usually don't get the deep freeze stuff till late Jan/early Feb here.

Sty close to the heater.

Tom

Married with 2 kids, I am no stranger to pain!

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12-23-2008 04:12 AM  8 years agoPost 325
jschenck

rrProfessor

La Vista, NE.

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-16ºC = about +2ºF - same temp in QB and MO!
So we are having an unusual night here. The temp will go UP 10ºF from about 8pm to somewhere early in the morning making it up all the wayto 18ºF. We are supposed to get all the way up to near the freezing point tomorrow - heat wave!!

What ever you do don't put that switch in the stock location on the Predator. It's right in front of the muffler and will require you to get 2nd degree burns every time you want to turn it off at the end of the flight.

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12-23-2008 06:16 AM  8 years agoPost 326
pgkevet

rrKey Veteran

Wales

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my advice is to locate the switch close enough to the pullstart with an indicator nearby so that its harder to forget to switch on!

pgk

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12-23-2008 08:22 PM  8 years agoPost 327
AceBird

rrElite Veteran

Utica, NY USA

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Separating the frames is a time consuming task and will yield nothing in the way of properly aligning the Jewel to the starter shaft.
Well he broke the motor shaft because he didn't have it lined up. If he separates the upper from the lower he can tell if it is lined up. You can't tell for sure if they are already together so the choice is his. Isn't it?

Ace
What could be more fun?

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12-23-2008 08:24 PM  8 years agoPost 328
AceBird

rrElite Veteran

Utica, NY USA

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I heard that the JR HD switches are the best, is that so?
My first heli did a chicken dance because of one. JR is no better than anyone else. Best thing is back up generator hands down.

Ace
What could be more fun?

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12-23-2008 08:43 PM  8 years agoPost 329
j.8

rrVeteran

Denmark

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as long as you don`t break the motor shaft

Regards Bo

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12-24-2008 12:10 AM  8 years agoPost 330
turbogti

rrVeteran

St. Andrew, Jamaica

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ACE i don't believe separating the frame is necessary while fitting up the jewel.

The alignment was good until i tightened the cyclic bellcrank screws. This is where the mis-alignment will occur if you are not careful.

I saw Raja install the Jewel easily without pulling the frame, the difference is that he made certain to check the alignment after tightening the bellcrank.

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

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12-24-2008 01:02 AM  8 years agoPost 331
zorba

rrApprentice

Montreal, Quebec,​Canada

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I agree with you Turbogti. I had to do the same thing.
I tightened the left bellcrank screw a bit the the right one and back and forth until it was tight and level. Even with upper and lower frames attatched the jewel spins freely.

Cheers

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

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12-24-2008 06:03 AM  8 years agoPost 332
Excalibur

rrKey Veteran

Destination: Earth

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You can't tell for sure if they are already together so the choice is his. Isn't it?
Absolutely. And it doesn't hurt to have sage advice from somebody who's actually been there and done that. That's why there is no reason to separate the frames.

Xcal

Camper Fuel: It's Not Just for Breakfast Anymore

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12-24-2008 02:16 PM  8 years agoPost 333
turbogti

rrVeteran

St. Andrew, Jamaica

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Ok i realized that i haven't told you all that i took off the cylinder on my engine to check the ring as well as the condition of the cylinder and ring.

Since then both Raj & i have been speaking to AL from Hanson, i sent Al photos of the piston and the cylinder for him to give his feedback on it.

From inspection and the photos the piston has some scratches on the exhaust side but these aren't as deep as they look in the photos. also i have some carbon deposits on the piston crown not much thou.

What Al has said is that both cylinder and piston are good, he also confirmed that my engine is a Bruce HAnson engine, so AL gave me some advice on what to do before re-installing the engine, such as cleaning off the carbon, etc.
He also told me to change the ring and break in the engine again.

So today i'm on a mission to find a replacement ring for my engine, if i can't find one here i'll have to order one.

I'll post photos of the engine later on.

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

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12-25-2008 06:24 AM  8 years agoPost 334
turbogti

rrVeteran

St. Andrew, Jamaica

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Photos of Cylinder & Piston

Not the best photo, but the cylinder is smooth and clean no scratches

Intake side

Carbon build up on the crown

Piston scratches

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

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12-25-2008 12:32 PM  8 years agoPost 335
AceBird

rrElite Veteran

Utica, NY USA

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The alignment was good until i tightened the cyclic bellcrank screws. This is where the mis-alignment will occur if you are not careful.
Listen to yourself. The point is while the upper and lower frames are together with the bell and the clutch connected you CANNOT confirm alignment. Make what ever choice you like.

I think the piston doesn't look good at all and I would polish those scratches out before reusing it. Even the connecting rod looks burnt. Possibly the cylinder is still good if the plating is not ruined.

You better change your ways about engine tuning.

Merry Christmas every one.

Ace
What could be more fun?

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12-25-2008 12:52 PM  8 years agoPost 336
turbogti

rrVeteran

St. Andrew, Jamaica

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ACE ok maybe i didn't quite make myself clear, so i'm going to type slowly

When I fitted the jewel it was aligned the problem came when i snugged up the bellcrank screws, this allowed the jewel mount to kick up slightly, which I wasn't aware at that time.
It was brought to my attention when Raja was here and started to snug up these same bellcrank screws.
(When we noticed this i decided to take photos and post it here.)
We then snugged up the screws while adjusting the jewel mount so that its as level as possible.

As XCal said the couplers should provide some give if the alignment isn't exact.

Regarding the piston, as i said earlier the photos make the scratches look worse than it is also Al said the piston looks good. The problem stems from the ring, which is why Al said to get a new ring and re-break in the engine.

BTW - i never said i was an engine tuner, why do you think i have kept this thread going?
This thread is for people like myself who's learning gassers and who may come across these same problems. I could have kept all this info/photos to myself but how would that help others?

Oh yes Merry Christmas to all my Gasser friends, Happy flying

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

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12-25-2008 08:25 PM  8 years agoPost 337
turbogti

rrVeteran

St. Andrew, Jamaica

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Working on the heli during Christmas

Ok lets see whats completed
  1. Fix Chafed wire on gyro servo - DONE!
  2. Coil wire rubbing on engine support frame - DONE
  3. Remove spacer from V3 muffler - NOT YET
  4. Check engine head bolts for tightness - DONE
  5. Tighten Main shaft lower collar - DONE
  6. Re-run wires from electronics (I'll get points for neatness) - DONE
  7. Re-run receiver wire to under landing gear (I think ACE had pointed this out to me some time ago) - IN PROCESS
  8. Adjust tail bevel gear further up on crown gear - DONE
  9. Adjust canopy mounting arm - NOT DONE
Now adjusting the tail bevel gear higher on the crown has now made the entire drive system tight so i'm going to have to check that.

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

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12-26-2008 02:12 PM  8 years agoPost 338
AceBird

rrElite Veteran

Utica, NY USA

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As XCal said the couplers should provide some give if the alignment isn't exact.
This is where you and (he) needs to learn. The coupler is designed to allow for a few (.003-.005) inch concentricity. That is nothing you can see by eye, especially an untrained eye. I give advice just like many others give advice. As I said, you don't have to listen, it is not going to matter to me. I am sure if it happens to you again or it happens to someone else that chooses to listen to the wrong advice they will be inclined to rethink their methods. I will just wait it out. It won't be long.
Now adjusting the tail bevel gear higher on the crown has now made the entire drive system tight so i'm going to have to check that.

Here again the entire upper frame assembly should be done as a separate assembly before it is married to the lower frames. Gears can be set, collars can be set and alignments done right without having other things messing up what you are trying to do. It is so much easier when you don't have ten pounds of other stuff in the way.

Good luck on your next flight.

Ace
What could be more fun?

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12-26-2008 08:02 PM  8 years agoPost 339
turbogti

rrVeteran

St. Andrew, Jamaica

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Here again the entire upper frame assembly should be done as a separate assembly before it is married to the lower frames. Gears can be set, collars can be set and alignments done right without having other things messing up what you are trying to do. It is so much easier when you don't have ten pounds of other stuff in the way.
Well ACE i must say that because of what i had to do to the heli i had to separate the frames, adjusting the gear and so on was done easily.
It may ease your mind that while separated i checked the jewels alignment, and i discovered no difference.
I also checked the jewel after i adjusted the gears and again no noticeable difference.

Thanks for your advice

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

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12-27-2008 01:11 AM  8 years agoPost 340
turbogti

rrVeteran

St. Andrew, Jamaica

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All modifications/adjustments have been completed. I just need to mix a new gallon of fuel.

Ready when you are Raja

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

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 23 pages [ <<    <     15      16     ( 17 )     18      19     NEXT    >> ] 23743 views
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Predator tail shaking up and down
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