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 on: Yesterday at 12:41:17 PM 
Started by Matt Colan - Last post by peabody
The headers that Randy Smith sells will work, I believe...

 on: Yesterday at 12:23:04 PM 
Started by bob whitney - Last post by bob whitney
 stunt and scale flyers might want to take a look at the pull test post going on in the racing column under new moderater

 on: Yesterday at 12:20:06 PM 
Started by bob whitney - Last post by bob whitney

Bill i cant get it to work, what dose   /line length mean. 

it is hard to believe that i could hold on to a plane pulling 98 lbs in a pylon and as we can see the stunters and scale ships are being over pulled  ( again my words )

 on: Yesterday at 12:10:35 PM 
Started by Ty Marcucci - Last post by Tim Wescott

Whatever the current penalty is for clinging to the sleeve of a first responder and causing a death, or blocking the road with your car or whatever, that's what should happen when drones are involved.  And, probably, it's already applicable.

 on: Yesterday at 12:08:16 PM 
Started by Rusty Pieper - Last post by Tim Wescott
I'm unable to identify the I.C.s  Where is the source for Sky65116 and FF2317  ?


Google?  Sky is a new IC manufacturer, or at least a new name in the US.  The other chips look like RF2317.

 on: Yesterday at 12:08:04 PM 
Started by Matt Spencer - Last post by FLOYD CARTER
A little filing on the case can't really improve the weight that much.  The real weight reduction comes from:

1)  throw away the stock muffler

2)  grind metal off the cylinder head (although I haven't yet done that)

My ST51 came from Tommie Lay, so maybe I should leave it alone?


 on: Yesterday at 12:05:05 PM 
Started by bob whitney - Last post by BillLee
thanks Bill, for us dummys what would the pull be on a 60 oz plane at 160 mph ans a 60 oz plane at 50 mph , both on 65 ft lines

Bill, i know we are talking speed here but do u remember what the pull was on any of the ships ??


60 ounces at 160mph on 65' lines = 98.74 lbs

60 ounces at 50mph on 65' lines = 9.64 lbs

CF is a function of the speed squared. I.e., if the speed doubles, the CF quadruples. In your simple example, the ratio of the speeds is 3.2, which squared is 10.24.

98.7 = 9.6 x 10.2

 on: Yesterday at 12:01:31 PM 
Started by t michael jennings - Last post by t michael jennings

Replaced the OS Max 46LA with another OS Max 46LA.  Purchased two together last year.

Did not change the uniflow tank or the Crap Trap.  Did back flush and clean out the fuel tank.  Did back flush the Crap Trap.  Used the SIG fuel purchased in Apr 2015.

Started the engine with in 3 flips.  It flew 5.1 second lap time and engine did not flutter.

On the Problem engine, I removed the needle valve assembly.  Removed the needle.  Was able to look thru the needle valve throat.  It was not clogged (no obstruction).

Put the disassembled needle valve assembly in a container of lacquer thinner and agitated.  A black material appeared in the solution.  It seemed that there was an obstruction in the needle valve body opening to the ventura. 

Reasonable sure that that was the engine run issue.
Reassembled the engine and put some After Run oil in the engine.

Thank each of you for the timely info in running this issue down.

T Michael Jennings     Hoff
Knoxville, TN.

 on: Yesterday at 11:57:14 AM 
Started by Rusty Pieper - Last post by FLOYD CARTER
I'm unable to identify the I.C.s  Where is the source for Sky65116 and FF2317  ?


 on: Yesterday at 11:55:36 AM 
Started by Bob Hunt - Last post by Serge_Krauss
Thanks for that information, Bob (and John). This is a very interesting and significant thread!


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