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Post by Garf on Apr 13, 2010 12:50:39 GMT -7
I HATE to have something like this beat me. I put 4 tanks thru the engine today. It sounds pretty good, but it always did on the bench. Now to put it on a plane and see what happens.
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Post by Garf on Jun 21, 2010 12:44:18 GMT -7
I put the Brodak 40 on the new Fronkensteen 3. The LA 46 that was on it ran dead steady, so it has a solid base. If it won't run steady this time, that's it.
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Post by Garf on Jun 27, 2010 14:14:55 GMT -7
I put up 4 flights on the Brodak 40 today. No sign of the main problem that I have had with this thing. It still tends to run cold when run without a muffler, but that's manageable.
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Post by Garf on Jul 5, 2010 13:10:49 GMT -7
Put up 2 more flights on the Brodak 40 today. So far it is flawless.
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Post by jehold66203 on Jul 8, 2010 20:31:07 GMT -7
Sounds like you are getting it broke in. I have the EVO .36 that I am having problems with. It doesn't like the tongue muffler. Also using the tall insert that has the smallest hole. Have it on the ARF Nobler in which I had to add some lead to the tail to get it to turn. Haven't told you that Arctic Fox designed by Leo Mehl is no more. Had finally got the problems cured with the B-40 and it was flying great. First flight in Topeka contest I did the inverted pullout for the reverse wingover. The plane went about ten feet and took a nose dive. The wing was being stripped unil a quart can of Brodak clear fell off the shelf and landed dead center of the wing. By the way the Thunderbolt is ready for its first flights. Have fun, DOC Holliday
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Post by Garf on Jul 9, 2010 12:39:08 GMT -7
Sounds like your luck's not much better than mine. The Brodak is looking good, but I'm still not totally convinced. I cured my EVO 36 by drilling the large venturi thru and installing a Super Tigre NVA. Runs good this way.
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Post by Garf on Mar 16, 2011 15:44:07 GMT -7
So much for having the Brodak 40 straightened out. I installed it on a T-bird and decided to use the muffler. It went lean, bound up, and wouldn't hold a setting. Remove the muffler and it went back to "normal". I will try to fly it without the muffler and see what happens. UPDATE: I changed my mind due to the nearness of the "Golden Oldies" contest at the field of dreams. I installed a FP 35 with muffler but might have to add some lead to allow it to turn. We'll see.
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Post by Garf on Mar 28, 2011 17:56:30 GMT -7
The FP 35 wouldn't stay running at all. I might have a bad tank. The FP 35 is starting to lose compression, so I pulled it and after a little rework, I reinstalled the Brodak 40. The muffler was creating a bind in the engine when tightened. The muffler flange was rough as a corn cob. No longer. Now to test run it. UPDATE: After a ground run, although there was no bind, it wouldn't hold a setting. Most likely a bad tank. More surgery.
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Post by chuckfeldman on May 5, 2011 6:37:08 GMT -7
Garf,
I think you are your own worst enemy. Not trying to be unkind to you but I have read this entire post. you seem to experiment to much. I recommend that you establish a stand fuel. IE Sig 10 nitro 20 % oiL half castor half synthetic. Never us RC fuel Never put 100% castor fuel in a modern engine. Do not use fuel filters in or on your plane. Filter the fuel on you filling equipment. Use Sig number three plugs no others. When mounting a muffler never tighten it down hard. Just snug it on. Fuel tanks and fuel lines need to pressure tested using a fuel syringe filled with air. Do this by taking your feed line connected back to the tank and connect you syringe to the other tube. How push the plunger in and Watch the tank expand and get ridged. Keeping the pressure on put the tank under water. Look for bubbles. Test stands are hard to get set up right. Seems you have to stand there and adjust the needle to hold a steady setting. I use one but do not like to. OK sorry if I stepped on your toes. P;ease forgive me. I hope to meet you at a Florida contest some day.
Chuck Feldman
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Post by Garf on May 5, 2011 7:53:33 GMT -7
First, I believe in filters. Yes, cheap filters can cause more trouble than they cure. Spend some money for good filters. I mix my own fuel. The fuel for the ABC and AAC engines is pretty much standard. For a long while I used 5/15/5 Nitro/castor/klotz, then I went to 5/10/10 Nitro/castor/klotz. If you fail to tighten the mufflers down, you WILL be looking for it in the grass. All my other engines that use mufflers have had no trouble with them. Tanks, ABSOLUTELY, pressure test tanks under water, PLUS, pressurise the entire system on the aircraft. I have found several leaking lines that way. Plugs? there are a lot of good plugs out there. I like the OS 4 cycle and the Fireball hot and the Thunderbolt R/C
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Post by Garf on May 7, 2011 16:53:26 GMT -7
I hope to meet you at a Florida contest some day. Chuck Feldman I was at the last 2 St Augustine contests at the field of dreams, the KOI and the Golden Oldies.
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Post by Garf on May 30, 2011 18:16:50 GMT -7
;D I sometimes question my own sanity, but, I am going to try the Brodak 40 on the "new" profile Nobler made from the remains of the first NoblARF that I destroyed. On paper, it should be a perfect combination. It seems to me like the engine is cursed.
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Post by Garf on Jun 2, 2011 18:06:05 GMT -7
I decided to bench run the Brodak 40 before I put it on the Profile NoblARF. First I installed a new plug I got from England. It ran great, but it usually did on the ground.
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Post by Garf on Jun 8, 2011 16:18:04 GMT -7
I mounted the Brodak on the Profile Nobler. I test ran it today. It would not hold a setting. It would go lean, I open the needle to no effect, it would suddenly go rich and quit. Restart, get a setting, run a minute, go rich and quit. Filter is clean. This is with muffler installed. I will try to fly it without the muffler.
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Post by Garf on Jun 12, 2011 20:07:41 GMT -7
I flew the Brodak 40 today without the muffler. It ran a steady flight with only the usual leaning out near the end of the flight. There's something about the muffler that the engine doesn't like. Later, I might try a different muffler on it.
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Post by Garf on Jun 19, 2011 13:00:00 GMT -7
I put up 4 flights on the Brodak 40 today. It ran perfectly except for the usual leaning out at the end of the flight. I switched to uniflo for the last flight. It helped slightly. I need to shim the rear end of the tank out a little and see what happens.
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Post by Garf on Jun 26, 2011 11:56:20 GMT -7
I put up 4 more flights on the Brodak today starting with 15% nitro fuel. On the ground, the setting started a steady 2 cycle with a hint of a rich break. After launch, it stood that way for a few laps, then went slightly rich and stood there for the rest of the flight until almost empty, then went dead lean. Power level was way up. I tried the 5% nitro on the last flight. I think it needs 10% nitro fuel.
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Post by Garf on Jul 24, 2011 16:11:25 GMT -7
Although the engine is running better, I am not happy with it. It is now back in its box till further notice.
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Post by jehold66203 on Aug 11, 2011 8:32:11 GMT -7
You have had so much troube with that B-40 I am surprised you haven't canned it. Mine is in the nose of lthe King Sweep which I need to get back out. Wing is so stiff I can't get the major warp out. By the way I run my B-40 with Top Flite 11-4, Excalber 10% fuel and uniflow tank with a tongue muffler that Brodak sells. I have an OS LA 40 I might trade for your B-40.
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Post by Garf on Jan 19, 2012 20:55:44 GMT -7
I currently have the B 40 on the NoblARF #2 with a Thunder Tiger 11-4.5 prop. I have a strap-on muffler on it. It seems to be doing fairly well.
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