G-62 break-in
07-11-2008, 08:47 AM
#6
Join Date: Jan 2006
Location: Kalona,
IA
Posts: 2,517
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
Each Zenoah I've owned (actually any gasser)....Pennzoil 40:1 from day one, properly tuned, properly cooled. Standard approximate 12 minute flight times, with full cool down in between flights. Breaking in the engine is more about heat cycling than it is hours or number of gallons. Just tune it, cool it and heat cycle it.
Chad
Chad
07-11-2008, 10:32 AM
#7
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
A 22x10 prop, Penzoil at 40:1, proper cooling, tune the carb 100 rpm rich, fly the snot out of it (lots of throttle changes).
No long torque rolls or hovering for the first few gallons
No long torque rolls or hovering for the first few gallons
07-11-2008, 06:47 PM
#9
RE: G-62 break-in
ORIGINAL: tkg
A 22x10 prop, Penzoil at 40:1, proper cooling, tune the carb 100 rpm rich, fly the snot out of it (lots of throttle changes).
No long torque rolls or hovering for the first few gallons
A 22x10 prop, Penzoil at 40:1, proper cooling, tune the carb 100 rpm rich, fly the snot out of it (lots of throttle changes).
No long torque rolls or hovering for the first few gallons
DING! DING! DING!
We got a winner!!! Concentrate on the "40:1" part and the "fly the snot out of it" part. [sm=lol.gif] I dare you to break it.
07-11-2008, 08:00 PM
#10
Senior Member
My Feedback: (264)
Join Date: Apr 2003
Location: Great Mills,
MD
Posts: 2,223
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
The G-62 is one tough engine, I have two of them. Wal-mart oil would be fine as long as you follow the suggested mixing ratio on the label. Tune the engine and fly. It is much more likely the engine will be damaged in a mishap than anything else.
07-12-2008, 12:19 AM
#11
My Feedback: (5)
RE: G-62 break-in
[quote]ORIGINAL: rcdude7
The G-62 is one tough engine, I have two of them. Wal-mart oil would be fine as long as you follow the suggested mixing ratio on the label. Tune the engine and fly. It is much more likely the engine will be damaged in a mishap than anything else.
[/quo
i TOTALLY AGREE
07-12-2008, 12:34 AM
#12
RE: G-62 break-in
Would a 20" prop be ok if ground clearance is a problem? I'm not too worried about having enough power. If not, I'll have to find a longer landing gear for my Big Bee. I'm preparing for the first flight next week if all goes well.
07-12-2008, 10:23 AM
#13
RE: G-62 break-in
ORIGINAL: Texastbird
Would a 20" prop be ok if ground clearance is a problem? I'm not too worried about having enough power. If not, I'll have to find a longer landing gear for my Big Bee. I'm preparing for the first flight next week if all goes well.
Would a 20" prop be ok if ground clearance is a problem? I'm not too worried about having enough power. If not, I'll have to find a longer landing gear for my Big Bee. I'm preparing for the first flight next week if all goes well.
07-12-2008, 07:19 PM
#14
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
ORIGINAL: Texastbird
Would a 20" prop be ok if ground clearance is a problem? I'm not too worried about having enough power. If not, I'll have to find a longer landing gear for my Big Bee. I'm preparing for the first flight next week if all goes well.
Would a 20" prop be ok if ground clearance is a problem? I'm not too worried about having enough power. If not, I'll have to find a longer landing gear for my Big Bee. I'm preparing for the first flight next week if all goes well.
07-12-2008, 08:06 PM
#15
Senior Member
My Feedback: (1)
Join Date: Oct 2004
Location: Altaville,
CA
Posts: 1,416
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
Course with the smallest prop you can drill and fit you need the cheapest breakin oil you can get yer hands on. Or did I miss something.?
Don't mind me, just muttering, lets see, 20x10 prop at 85ish hunerd rpm on whatever oil walmart sells at the cheapest price. Sounds like a hoot! in progress. Then figure the feller doesn't really have a clue bout tightening, balancing, picking out a good strong, prop. But hey! What could possibly go wrong?
Don't mind me, just muttering, lets see, 20x10 prop at 85ish hunerd rpm on whatever oil walmart sells at the cheapest price. Sounds like a hoot! in progress. Then figure the feller doesn't really have a clue bout tightening, balancing, picking out a good strong, prop. But hey! What could possibly go wrong?
07-14-2008, 01:07 PM
#17
Join Date: Jan 2006
Location: Kalona,
IA
Posts: 2,517
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
Out of curiosity...texastbird, what plane are you mounting a 62 on, that you only have clearance for a 20" prop? A quality 20x10 three blade might do the trick for you.
Chad
Chad
07-15-2008, 08:08 PM
#18
RE: G-62 break-in
Chad
Its a Bridi Big Bee. I got it in a trade. All new, engine has never been run. I think it was originally designed for a Q35 or a G38. With the landing gear that came on it, I just might have clearance for a 22". I ordered one from TBM and we'll see what happens. I've seen a Big Bee flying with a 3W of around 60CC a couple of years ago. Maybe they had a different gear on it. What would be a quality 3 blade for this size engine? All that is available around here are APCs and (cough) Zingers.
Its a Bridi Big Bee. I got it in a trade. All new, engine has never been run. I think it was originally designed for a Q35 or a G38. With the landing gear that came on it, I just might have clearance for a 22". I ordered one from TBM and we'll see what happens. I've seen a Big Bee flying with a 3W of around 60CC a couple of years ago. Maybe they had a different gear on it. What would be a quality 3 blade for this size engine? All that is available around here are APCs and (cough) Zingers.
07-16-2008, 08:15 AM
#19
Join Date: Jan 2006
Location: Kalona,
IA
Posts: 2,517
Likes: 0
Received 0 Likes
on
0 Posts
RE: G-62 break-in
Mezjlik 20x10 or 20x12....or maybe a Pt Models 21x10. If you think you can make a 22x10 2-blade happen, that's the direction I'd stick with. Good luck and keep us posted.
Chad
Chad
07-28-2008, 07:34 PM
#20
RE: G-62 break-in
Everyone says to stick a 22x10 on a G62. Well, I did that on my Giant Aeromaster. It had all the agility of a beached whale. And that's about how fast it moved too. The most I could get out of that engine/prop combination was 6,100 rpm (NX prop). As the engine came out of the box, max RPM with this prop was 5,800. Pathetic. The plane barely got into the air.
I've now changed to a 20x10 prop, which the G62 turns at 7,800 RPM. I've backed it off to 7,400 and it's like a whole different plane. This is with a Pro Zinger wood or MA Classic, wide paddle blade glass filled nylon prop. This combination pulls the plane with good authority.
In my mind, it is absoutely impossible to get anywhere near the suggested 7,200 RPM with a 22x10 mentioned in the instruction manual.
I've now changed to a 20x10 prop, which the G62 turns at 7,800 RPM. I've backed it off to 7,400 and it's like a whole different plane. This is with a Pro Zinger wood or MA Classic, wide paddle blade glass filled nylon prop. This combination pulls the plane with good authority.
In my mind, it is absoutely impossible to get anywhere near the suggested 7,200 RPM with a 22x10 mentioned in the instruction manual.
07-28-2008, 09:56 PM
#21
RE: G-62 break-in
ORIGINAL: do335a
Everyone says to stick a 22x10 on a G62. Well, I did that on my Giant Aeromaster. It had all the agility of a beached whale. And that's about how fast it moved too. The most I could get out of that engine/prop combination was 6,100 rpm (NX prop). As the engine came out of the box, max RPM with this prop was 5,800. Pathetic. The plane barely got into the air.
I've now changed to a 20x10 prop, which the G62 turns at 7,800 RPM. I've backed it off to 7,400 and it's like a whole different plane. This is with a Pro Zinger wood or MA Classic, wide paddle blade glass filled nylon prop. This combination pulls the plane with good authority.
In my mind, it is absoutely impossible to get anywhere near the suggested 7,200 RPM with a 22x10 mentioned in the instruction manual.
Everyone says to stick a 22x10 on a G62. Well, I did that on my Giant Aeromaster. It had all the agility of a beached whale. And that's about how fast it moved too. The most I could get out of that engine/prop combination was 6,100 rpm (NX prop). As the engine came out of the box, max RPM with this prop was 5,800. Pathetic. The plane barely got into the air.
I've now changed to a 20x10 prop, which the G62 turns at 7,800 RPM. I've backed it off to 7,400 and it's like a whole different plane. This is with a Pro Zinger wood or MA Classic, wide paddle blade glass filled nylon prop. This combination pulls the plane with good authority.
In my mind, it is absoutely impossible to get anywhere near the suggested 7,200 RPM with a 22x10 mentioned in the instruction manual.
I break mine in with a bit smaller prop and let 'em spin for a few gallons first. THEN slap the big wood on it and see how she does.
The stock muffler will cost you a BUNCH of RPMs. Replace it with a pitts or side dump muffler and you will see a nice gain in RPM's.
07-28-2008, 10:30 PM
#22
RE: G-62 break-in
RCpilot,
I imagine that you are totally correct about the stock muffler. I immediately removed it and chucked it into the engine box. I'm using a Slimline wrap around Pitts muffler.
I've also found as you suggest that the G62 goes much better when new with a smaller prop that lets it rev up a bit. I'll wait until it gets about 3-4 gallons of fuel through it and then try the 22" props again. Right now, I'm at about 2 gallons.
I imagine that you are totally correct about the stock muffler. I immediately removed it and chucked it into the engine box. I'm using a Slimline wrap around Pitts muffler.
I've also found as you suggest that the G62 goes much better when new with a smaller prop that lets it rev up a bit. I'll wait until it gets about 3-4 gallons of fuel through it and then try the 22" props again. Right now, I'm at about 2 gallons.
