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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Fuji-Imvac Engines Support >> Scratched Flywheel
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Scratched Flywheel - 12/5/2004 9:19:27 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Mr. Baxter, I have a Fuji 64, which I fly in a 1/3 scale Sopwith Pup..........The engine runs excellent! My concern and my question to you is,,,,,,,,,,,as the engine is run the flywheel contacts the coil pickups. this places a scratch or groove most of the way around the flywheel. the gap was done with a business card. This is the 3rd fuji I have owned....2 64s and a 50. All three have done this.......Should I be concerned ???????????????thanks. Skip D

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There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup
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RE: Scratched Flywheel - 12/6/2004 4:55:35 PM   
Bax


 

Posts: 12459
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		Increasing the spacing a little bit would be the solution. You may have it set a little close. We set the ignition poles as close as possible without hitting.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

(in reply to Capt. Crackup)
       Post #: 2

RE: Scratched Flywheel - 12/8/2004 11:10:56 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Mr Baxter, Thanks for the response. I have looked at the engine close and it appears to have "play" in the bearings. This is my second Fuji 64. It is actually a warrenty replacement for my first. My first one had a catostrophic jug separation. As with the first one, it runs really well, and it is fairly easy to start. I do not use a spring starter. I hand start and it starts fairly easy.
But back to the original subject,,,,,,,,,,looking at the gap there is approx 030-040 gap. I am confident that should somethig happen, warrenty would probably cover it, but I would rather keep this one.........Should I be concerned???????? Any recommendations?????????
Thanks Skip D

< Message edited by Capt. Crackup -- 12/8/2004 11:12:25 PM >

_____________________________

There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup

(in reply to Bax)
       Post #: 3

RE: Scratched Flywheel - 12/31/2004 12:29:55 PM   
bbold1



Posts: 56
Joined: 12/26/2003
From: East Stroudsburg, PA, USA
Status: offline 		Hello, I had the same problem with my 50 fuji with the flywheel and I also had one of the cylinder corners crack which in turn made the whole cylinder come loose and destroyed the cylinder and piston . It was replaced by warrenty but now I am concerned about a repeat performance.
My question....... Where can find an aftermarket muffler for my fuji 50 so i can fit it in the cowl of my Top Flight P51 Mustang ARF with out having to butcher the cowl real bad.
Thanks

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Bob

(in reply to Capt. Crackup)
       Post #: 4

RE: Scratched Flywheel - 1/3/2005 4:08:01 PM   
Bax


 

Posts: 12459
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		We do know that Bisson makes several mufflers for the Fuji engines. Please check with them to see if one meets your needs.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

(in reply to bbold1)
       Post #: 5

RE: Scratched Flywheel - 1/3/2005 4:28:57 PM   
bbold1



Posts: 56
Joined: 12/26/2003
From: East Stroudsburg, PA, USA
Status: offline 		Thanks Bill
I just sent them an e-mail
Bob

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Bob

(in reply to Bax)
       Post #: 6

RE: Scratched Flywheel - 1/5/2005 5:53:07 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Mr. Baxter,
Is it normal for the Fuji 64 to have side (radially) play in the bearings? My 64 has more at about 5 months of age than my US41 does at 3 yrs. That side play is definately where the flywheel scratches/gouges are coming from. This engine is a warranty replacement, and I do not want a repeat performance of a jug separation. The first failure almost cost me a 1/3 scale Sopwith Pup. Should I be concerned and what should I do? I have a letter drafted up and receipts ready to send in.
thanks Skip D.

< Message edited by Capt. Crackup -- 1/6/2005 12:46:42 AM >

_____________________________

There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup

(in reply to bbold1)
       Post #: 7

RE: Scratched Flywheel - 1/6/2005 8:57:38 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Does anyone have any ideas, or insight as to the condition of my engine. ( Please see the above posts) Correct me if I'm wrong but there should be very minimal to no play in the crank bearings when the shaft is moved up and down or side to side. Any help would be appreciated.
Thanks Skip D.

_____________________________

There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup

(in reply to Capt. Crackup)
       Post #: 8

RE: Scratched Flywheel - 1/6/2005 9:58:30 PM   
Bax


 

Posts: 12459
Joined: 4/26/2002
From: Champaign, IL, USA
Status: offline 		Side-to-side (radial) play should be negligible. A small amount of fore-and-aft (axial) play is normal.

Is the flywheel out of round? Or do have actual radial movement of the crankshaft? If necessary, send the engine to us and we'll check the runout on the crank and flywheel.

_____________________________

Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: hobbyservices@hobbico.com

(in reply to Capt. Crackup)
       Post #: 9

RE: Scratched Flywheel - 1/6/2005 10:25:19 PM   
bbold1



Posts: 56
Joined: 12/26/2003
From: East Stroudsburg, PA, USA
Status: offline 		Mr Baxter, ITs really nice to see that some one from Hobby Service`s Monitors and posts replys and help to people on R/C Universe
There is nothing better than getting the Correct Information from a Qulified person such as yourself.
And I must also add that Hobby Services has one of the BEST Warranty and Retun Policy`s I have ever had to deal with.
Hats Off to all you folks at Hobby Services.
Just a question now : From your expierence is it a common Occurance for Fuji Engines to develope Play in the shaft at the flywheel and also problems with cylinder seperations or are the few times I heard about it just a coincidence?
Thanks for all your help and keep up the good work.
Bob

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Bob

(in reply to Bax)
       Post #: 10

RE: Scratched Flywheel - 1/6/2005 10:28:44 PM   
bbold1



Posts: 56
Joined: 12/26/2003
From: East Stroudsburg, PA, USA
Status: offline 		Mr Baxter
Oh I forgot to add that I have a brand new fuji 50 I plan to install on a Top Flite P51 Mustang ARF Problem is i cant find the right muffler to put on it to make it fit in cowl without butchering Do you have anything Specific in mind .
Thanks again
Bob

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Bob

(in reply to bbold1)
       Post #: 11

RE: Scratched Flywheel - 1/6/2005 10:31:32 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Thanks for the response Bill. I definately have radial play. But very little play at all in the thrust direction. So, I guess I'll be sending it in. I am very puzzled as to what is causing the problem. I had a US 41 that I ran about 3 flying days per month. Each flying day was 3-5 flights and about 15 minutes per flight. It was still running at the end of 5 years. I currently own a 41 on a Giant aeromaster which is 3 years old and runs great. It also has less radial play than my 64. The 64 runs good, but is obviously on its way to an early failure. This happened to me before and I almost lost a 1/3 scale Pup. This is the same airplane that is home for the engine we are talking about. I am going to send my engine in, hopefully for warrenty repair/replacement. I would very much appreciate any technical advice or ideas that you could give me. I like my Fuji and would like to keep flying it, but not in its present condition.
Thanks, Skip D.

< Message edited by Capt. Crackup -- 1/6/2005 10:33:22 PM >

_____________________________

There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup

(in reply to Bax)
       Post #: 12

RE: Scratched Flywheel - 1/17/2005 6:19:29 PM   
Capt. Crackup



Posts: 213
Joined: 2/11/2002
From: St. Marys, GA, USA
Status: offline 		Hey Bill,
Well, I sent my engine in and Hobby Services said that they agreed my bearings were in fact bad. They also said a new engine is on the way. I am impressed and appreciate the warrenty service provided, bbbbuuuutttttttttttt, I do not want a repeat experience with bearing failure. Rather than get a new engine every so often, (Which break in and set up can be a pain, ) I would much rather keep the same engine for about 3-5 years and get a new one.
This engine will again power a Balsa USA 1/3 scale Sopwith Pup, which is a very nice
WW1 model anxiously awaiting power. Most of the flight time is spent at 1/3
to 1/2 throttle. occasionally full throttle is used for take off and vertical maneuvers.
This WW1 fighter weighs 29.5 lbs. It has a 13" cowl, and I'm asking the Fuji to swing a 24x8 Zinger prop. I run 87 octane with a oil mix of 40:1. I run tech 2000 oil as I have run in all my other engies. I also run a velocity stack, and aluminum muffler from B&B Specialties. The fuji powers it great.
If there were a standard engine for this model it would be the Zenoah G-62. But the fuji is different and appears to be a better and stronger engine, if I could keep bearings and the jug in place. Plus it hand starts fairly easy. I would very much like to keep the fuji but, I place alot of value on my airplane and I need dependable power. I have also attached a picture of my Pup in flight which hopefully will be home to a dependable Fuji 64.
So Please, any suggestions, ideas, guesses or what ever you can provide that could help eliminate a repeat failure would be sincerely appreciated.
Thank you very much.
Skip D

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< Message edited by Capt. Crackup -- 1/17/2005 6:23:28 PM >

_____________________________

There's only one thing cooler than Radio Controlled Aircraft,,,,,,,,,,that's the guys that fly em!!
Capt. Crackup

(in reply to Capt. Crackup)
       Post #: 13

RE: Scratched Flywheel - 3/7/2008 12:23:43 PM   
rglass1144


 

Posts: 175
Joined: 10/24/2003
From: Burnsville, MN, USA
Status: offline 		Bill Baxter

I recently purchased the Fuji 64A and I noticed that the photo of the engine was a little different than the actual engine itself. I am refering to the coil fixing plate. It looks in the photo that the coil fixing plate is bolted to the crankcase and the cyclinder. On the motor itself there is no bolt through the coil fixing plate into the cyclinder. Which one is old and which one is new and what was the reason for the change?
Also what should the gap be between the flywheel and the coil ?

Thank you
Bob

(in reply to Capt. Crackup)
       Post #: 14