OS 1.60 woes (with perry pump even)  
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
       


90 Degree Muffler Adapter
Seller:  RC Specialties
Details:   $17.95   |  7/13/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> OS 1.60 woes (with perry pump even)
Page: [1] 2 3 4 5   next >   >>  

Login
Message << Older Topic   Newer Topic >>
OS 1.60 woes (with perry pump even) - 12/27/2004 12:10:12 AM   
dlucas48



Posts: 56
Joined: 11/14/2002
From: Crosby, TX, USA
Status: offline 		Still trying to get a CONSISTENT run. I now have the perry vp-30 pump mounted per instructions. The adjustment screw is out 4-5 turns, as it came from the factory. This looks like a lot, at first I thought it was vibrating out, but it stays there. This gave a rich run as it was supposed to. My N.V. is now open 3/4 turn or so. Is this close to what you guys are seeing? Engine has a new liner, ring, head gasket. (Don't ask) A-5 plug, 15% nitro, 18% oil (80 syn/20 castor). 18-6W APC prop on a Chief Katana. Total fuel system changeout and checkout, from the clunk forward. Engine carefully broke-in. 1st flight set a tad rich, went well. 2nd, it seemed to start missing, and finally died. Still had more fuel left than the first flight ended with. Glo-plug lit ok afterwards. Man, this used to be one of my most reliable engines, and has been nothing but a battle since I put it in this plane. No logical reason-tank is placed correctly. My question, then is, should I increase pump pressure by screwing the adj. screw on the pump in? I'm gonna lose this nice plane on one of these dead sticks, one day. Help! I've read all the Katana and OS 1.60 posts, but no one that i saw mentioned how far out they were running the adj. screw.
       Post #: 1

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 1:20:57 AM   
Cyclic Hardover



Posts: 7190
Joined: 5/7/2002
From: New Mexico, USA
Status: offline 		One guy here has the 1.60 in the WM GS P-51 for a couple years. I have seen a few others here that run fine. All with no pumps or regulators. If its that much trouble I would return it to Hobby Services and let "Baxter" keep it and have him send you another one. Tghe first thing they routinely tell you to get out of replacing and engine is "you ran it too lean." That is when the conversation stops and go way way over their heads.

I have done this many times over the years. Once in a while I'll get a bad one or it goes bad after a couple months. I will exhaust my knowledge and the final test is to install another carb that i borrow from the same engine type that somebody is not using . If it still runs the same,get rid of it.

< Message edited by Snoop Doggy Bag -- 12/27/2004 1:27:25 AM >

_____________________________

Retired Army Aviator - Excuse Me! You sold me a hair with a cake around it!

(in reply to dlucas48)
       Post #: 2

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 1:32:26 AM   
dlucas48



Posts: 56
Joined: 11/14/2002
From: Crosby, TX, USA
Status: offline 		It was reliable for 2 yrs.-as usual for os. Iv'e even put ceramic bearings in it, it was such a great engine that I felt it was worth it. So, it's not a matter of OS messing up when it was made. I ust want to compare notes on pump and needle settings. Oh, and it has a new Bisson muffler (in stock form) on it. I left that out.

(in reply to Cyclic Hardover)
       Post #: 3

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 3:50:42 AM   
DLT


 

Posts: 442
Joined: 12/13/2001
From: Foley, AL, USA
Status: offline 		On my set up like yours my needle valve is out 1 and 3/4. On my 2 160's they like running a little on the rich side.

(in reply to dlucas48)
       Post #: 4

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 4:33:06 AM   
JoeAirPort



Posts: 6931
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: online 		I was pulling my hair out trying to get my Moki 1.80 with VP-30 to just keep running and transition once. It just would not throttle up and would just die after idling a few seconds. I finally turned that Perry pump in (CW) a bunch of turns until there were only three threads showing (made it richer). It started right up and after setting the high end and low end it runs like a top. Not sure why the factory setting was so far off from what my engine needed. I guess it makes sense since my engine was on the high end of the range to be used with that pump so the pump needed to be more rich. Always start with a rich setting on the pump, then lean as needed. I turned the VP-30 set screw in a little more while it was at full throttle and it really didn't have an effect on it so I backed it out to the "three threads" position again.

Can you elaborate a little more on how the engine runs at idle, transition, and full thottle?

Also that A5 plug is a really cold plug, are you sure you shouldn't go to a #8 or an A3?

http://www.osengines.com/accys/glowplugs.html

< Message edited by JoeAirPort -- 12/27/2004 4:39:06 AM >

_____________________________

Joe AP

(in reply to DLT)
       Post #: 5

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 5:23:41 AM   
Dan767



Posts: 481
Joined: 4/15/2003
From: Federal Way, WA, USA
Status: offline 		I'm not sure why you're using an A-5 plug. I'm using an A-8 with good results. I've used everything in mine (fuel wise) from 10% to 30% heli and no problems. If you've changed the line from the crankcase to the pump, you should have used Tygon and not glow fuel. The glow fuel line stretches and you lose a little pressure because the line expands. My pump is set near the middle of its range. I also found that I had to lean the idle mixture a considerable amount. It's been a great engine for me.

Attachments
Click to see fullsize image.
Click for fullsize


_____________________________

Dan
www.ctf.org www.caringbridge.org/visit/ashleyv Isaiah 40:31

(in reply to JoeAirPort)
       Post #: 6

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 11:11:12 AM   
Don M.



Posts: 1762
Joined: 3/2/2004
From: Halifax, NS, CANADA
Status: offline 		The A5 plug is fine. I switched from the A8 to the A5 in mine in order to get rid of the mid range "rattle" it did that with no other ill effects at all.

I have a V30 on mine and never touched the reg. screw, works fine. Is there a chance that the engine is overheating ???

_____________________________

I can only please 2 people every day and #2 just left.

(in reply to Dan767)
       Post #: 7

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 1:40:18 PM   
Cyclic Hardover



Posts: 7190
Joined: 5/7/2002
From: New Mexico, USA
Status: offline 		OKay , since it was reliable at one time, I will tell you this story, I rturned a ST 3500 once and a OS something tthat just would not idle or runwell at all after I had them for a while. When i sent them in, they determines it had a warped piston. How that happens is beyound me but it did. I had exhausted myself on them trying everything and thats what it was.

_____________________________

Retired Army Aviator - Excuse Me! You sold me a hair with a cake around it!

(in reply to Don M.)
       Post #: 8

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 3:56:57 PM   
dlucas48



Posts: 56
Joined: 11/14/2002
From: Crosby, TX, USA
Status: offline 		Thanks, all.
1. The tubing is the clear that came with it. Seems flimsier than aerotrend, but I used the clear that they sent (from crankcase to pump diaphragm.
2. I read on here to try the A5. It also helped mine with the mid-range rattle. I ran an A8 before.
3. OVERHEATING. Maybe! Although there looks to be plenty of openings, I'll try it w/o the cowl for a few flights and see.
4. 1 3/4 NV vs. my 3/4 NV setting. And screwing the pump adj. in makes the pump output higher. Maybe I should go outward (leaner). I wonder how long that screw is? They caution against backing it out too far and watching the spring fly away <G>.
5. That 18 x 6w really unloads in level flight. What would over-reving symptoms be-other than a thrown rod. Does that cause overheating?
6. On the ground, it ran great. Good idle, transition, and I set a slightly rich top-end. First flight went well in all throttle areas. It was the second flight when it started missing at 3/4 throttle and a few minutes later, it slowly died. Might have been overheated? What else would make an engine die, if it's got fuel and a good plug? I have not run it since that flight, compression seems ok, still.

(in reply to Cyclic Hardover)
       Post #: 9

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 4:19:00 PM   
JoeAirPort



Posts: 6931
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: online 		Any pic's of the Perry on your engine?

_____________________________

Joe AP

(in reply to dlucas48)
       Post #: 10

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 5:40:54 PM   
Dan767



Posts: 481
Joined: 4/15/2003
From: Federal Way, WA, USA
Status: offline 		Just for grins, I would be sure that your fuel is good. Mine has a tendency to not do well unless it's relatively fresh. Water tends to collect at the bottom of the fuel container....YMMV

_____________________________

Dan
www.ctf.org www.caringbridge.org/visit/ashleyv Isaiah 40:31

(in reply to JoeAirPort)
       Post #: 11

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 6:00:28 PM   
Schpankme



Posts: 267
Joined: 6/6/2004
From: Naperville, IL,
Status: offline 		dlucas48,

Here's a Prop Chart (Sea Leavel) for the OS 160 FX.*


__________
Schpankme

* Comment added that this Prop Chart is based at Sea level

Attachments
Click to see fullsize image.
Click for fullsize


< Message edited by Schpankme -- 12/29/2004 3:53:09 AM >

(in reply to dlucas48)
       Post #: 12

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 8:54:53 PM   
mrbigg



Posts: 2771
Joined: 10/30/2004
From: Streator, IL, USA
Status: online 		new piston and liner right? maybe not broken in all the way. mine took forever-a couple of gallons of fuel$$$$$. seems to run best on morgans 15%. my pump screw is turned pretty far in- maybe 2 to 3 threads out. main needle is 3/4 to 1 turn out.

_____________________________

PROVERBS 15:22 - Plans go wrong for lack of advice; many counselors bring success.

(in reply to Schpankme)
       Post #: 13

RE: OS 1.60 woes (with perry pump even) - 12/27/2004 8:59:28 PM   
JoeAirPort



Posts: 6931
Joined: 8/11/2003
From: Milwaukee, WI, USA
Status: online 		That exactly where my pump is set on my Moki 1.80 and it works great. I think he should richen up his pump to where ours are set. I already advised that earlier in the thread.

quote:

ORIGINAL: mrbigg

new piston and liner right? maybe not broken in all the way. mine took forever-a couple of gallons of fuel$$$$$. seems to run best on morgans 15%. my pump screw is turned pretty far in- maybe 2 to 3 threads out. main needle is 3/4 to 1 turn out.


_____________________________

Joe AP

(in reply to mrbigg)