RE: BME 115 Any Field Reports?  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Gas Engines >> RE: BME 115 Any Field Reports?
Page: <<   < prev  2 3 [4] 5 6 7 8 9 10 11   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: BME 115 Any Field Reports? - 4/8/2007 5:51:00 AM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Pontiac40

You'll need 3-1/2" to 3-3/4" bolts to make the lengths work if you use a wood standoff. My 4" bolts are about 1/2" too long, even allowing for 1/4" of excess to pass through the nut and washer.

Comp Arf U.K has some photos on how to make a removable tank tray. The stock version pretty near prohibits removing thr rudder servos if you use the stock rudder tray. If you can come up with some 6 to 9 ounce carbon fiber and some good laminating epoxy I came up with a neat little bracket for mounting switches, Matchboxes and stuff. No screws going through the fuselage or internal parts. I imagine it could be done with fiberglass mat as well.

Kraczy,

That problem you are having seems pretty common for Falkon at the moment. You may want to consider getting a CH and retiming the engine to use it. Keith can give you the wiring color codes to cross over from the Falkon sensor to the CH. I have them too if you need them. The sensor you have can remain in place, but the wiring has to cahnge.

< Message edited by Silversurfer -- 4/8/2007 5:54:30 AM >

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to Pontiac_40)
       Post #: 76

RE: BME 115 Any Field Reports? - 4/8/2007 10:44:51 PM   
Pontiac_40


 

Posts: 117
Joined: 4/25/2002
From: Fairfax, VA, USA
Status: offline 		SS thanks for the info, that's exactly what I will be doing with the gas tank tray. Where did you get the 3.5-4.0 inch bolts? I looked all over Lowes's nuts and bolts section and could not find anything that long. What diameter size are you going with for mounting the motor?

_____________________________

Fly and let fly

(in reply to Tired Old Man)
       Post #: 77

RE: BME 115 Any Field Reports? - 4/8/2007 11:22:18 PM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		http://www.microfastener.com I'm using a 10-32 x 4". Fender washers and lock nuts inside the firewall.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to Pontiac_40)
       Post #: 78

RE: BME 115 Any Field Reports? - 4/11/2007 6:30:12 PM   
Pontiac_40


 

Posts: 117
Joined: 4/25/2002
From: Fairfax, VA, USA
Status: offline 		SS, do you think 10x32 is enough, even if they are 3.5"-4" long?

_____________________________

Fly and let fly

(in reply to Tired Old Man)
       Post #: 79

RE: BME 115 Any Field Reports? - 4/11/2007 8:54:35 PM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Yes. If the bolt is supported by another form or structure there's no problem. I know of one 115 that's using 4-1/2" 10-32 bolts with no issues whatsoever. That one gets pushed a little hard from time to time. That's one of the reasons that I use wood standoffs that connect two mounting locations. Less twist. A big issue with single point standoffs is that they don't lend any support to a neighboring standoff and permit higher twisting loads. That's also one of the reasons you'll see larger bolts used in 100cc plus engines thn they really need.

Build a raised house on stilts at 4 corners. Make the stilts 6' tall. Don't tie the cornes together anyplace but the base of the house and the ground. In a good wind it's easy for the house to try to roate with the wind direction. Now tie those stilts together with diagonal braces. Twisting forces are better resisted. Now tie the stilts together with an "X" brace from corner to corner. Twisting force has even greater resistance.

You're not concerned about the bolt being stretched in it's length. That takes more force than our engines are delivering. However we are very concerned with twisting of those same bolts due to engine torque. Long, single leg standoffs are not a good thing regardless of bolt diameters.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to Pontiac_40)
       Post #: 80

RE: BME 115 Any Field Reports? - 4/11/2007 10:25:50 PM   
krayzc-RCU



Posts: 5970
Joined: 3/26/2002
From: Kannapolis, NC, USA
Status: offline 		Silversurfer
Keith at BME is sending me out a new ignition, i hope this doesn't become the trend talk at you soon as i can get that baby in there so i can fire this baby up

_____________________________

smooth as silk!

(in reply to Tired Old Man)
       Post #: 81

RE: BME 115 Any Field Reports? - 4/12/2007 2:01:53 AM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		I believe that's why you'll find that the Falkon's are going the way of the Dodo at BME and that CH is coming back. Good intents and distributor promises haven't made the product work any better. Will the price change? I don't know, but I doubt it. Will ignition reliability improve? Tremendously. Of that I have no doubt.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to krayzc-RCU)
       Post #: 82

RE: BME 115 Any Field Reports? - 4/12/2007 2:33:20 AM   
AmpAce


 

Posts: 76
Joined: 5/22/2006
From: Flyer's Paradise, USA
Status: offline 		Silversurfer,

So you know when they will switch back to CH? I'm planning on ordering an engine from them, and just as well wait until the CH is back on line with them.

Thanks for the update!

AmpAce

(in reply to Tired Old Man)
       Post #: 83

RE: BME 115 Any Field Reports? - 4/12/2007 6:08:27 AM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Give him a call. It may well be now.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to AmpAce)
       Post #: 84

RE: BME 115 Any Field Reports? - 4/12/2007 6:24:21 AM   
AmpAce


 

Posts: 76
Joined: 5/22/2006
From: Flyer's Paradise, USA
Status: offline 		SS,

I just now sent him an e-mail. Also asked about supply and demand and turnaround time for an order.

I'm not in a big hurry to get the engine, but don't want to be on the long end of an extended back-order situation, either!

Have you heard any bona fide running/tuning reports about the 115 Gen II engine with the shorter carb isolator block and carb? Keith says the Gen II is much easier to tune, and runs better.

AmpAce

< Message edited by AmpAce -- 4/12/2007 6:26:54 AM >

(in reply to Tired Old Man)
       Post #: 85

RE: BME 115 Any Field Reports? - 4/12/2007 2:45:41 PM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Not yet, but there should be a lot more info in a couple of days. It's the middle of the week and most people don't do a lot of engine stuff until the weekends. The first version is easy to work with. The only issue was that there were some difficult carbs on a few. Even those run very strong but left you with a rich middle.

It's still Gen I, but a different carb. The shorter reed block is only for visual appearances to make everyone happy.

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to AmpAce)
       Post #: 86

RE: BME 115 Any Field Reports? - 4/12/2007 3:39:48 PM   
AmpAce


 

Posts: 76
Joined: 5/22/2006
From: Flyer's Paradise, USA
Status: offline 		SS,

Interesting! The other day, in response to an e-mail about the longer isolator block, Keith called it a Gen II engine, and said it tuned and ran much better than the Gen I. Probably just sales hype.

Thanks for all of the info, and keep it coming, when you find out more!

AmpAce

(in reply to Tired Old Man)
       Post #: 87

RE: BME 115 Any Field Reports? - 4/12/2007 4:22:57 PM   
RTK


 

Posts: 3953
Joined: 4/20/2003
From: CENTRAL , CA, USA
Status: offline 		I think that had more to do with the carb than the block, I could be wrong. If time permits I will give mine a good abusing this weekend.

(in reply to AmpAce)
       Post #: 88

RE: BME 115 Any Field Reports? - 4/12/2007 4:42:06 PM   
Tired Old Man


 

Posts: 11533
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		'Bout time you finally chimed in. Be careful with that abuse that it doesn't turn into a "self" thing

_____________________________

If you can''''t fix it with a hammer, you have an electrical problem.

(in reply to RTK)
       Post #: 89

RE: BME 115 Any Field Reports? - 4/12/2007 4:56:17 PM   
RTK


 

Posts: 3953
Joined: 4/20/2003
From: CENTRAL , CA, USA
Status: offline 		Not enough time for self-abusing Gonna put in a 70 hour week, decided to take an extra day off.

< Message edited by RTK -- 4/12/2007 4:58:05 PM >

(in reply to Tired Old Man)
       Post #: 90

RE: BME 115 Any Field Reports? - 4/12/2007 4:57:29 PM