When I was building a Sonerai II it said in the instruction manuel that to set and determine the fuel flow you need to figure the angle of the airplane in a steep climb out, than figure 150% of your normal fuel consumpation of your engine, Set your plane up in that configuration on the ground by blocking up the wheels and or digging a hole in the ground under the tail and disconnect your fuel line from the carb keeping at the same height as it would be, and drain a quart into a jar while timing how long it takes to fill up the jar and multiply it by how many quarts go into your estimated consumpation amount at the 150%. Thus verifying you have enough fuel flow for climbout. Hope I didnt confuse this to much. Ron Miller -----Original Message----- From: [EMAIL PROTECTED] <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>; [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: Friday, December 11, 1998 4:43 PM Subject: Re: Two-Pronged Advice
>An additional potential problem might be that the elevator travel is set too >high....... If the coupe has been converted to a D model, with the 85 hp >engine, the elevatyor travel must be set to max of 9 degrees up. If left at >13 deg,or maybe set higher - would the airplane -with the additional power >attain such a steep angle ???? > >I suspect there are many C models/ partially converted to D models - ie 1400 # >gross weight.... but never limited elevator travel. > >I'm guessing now - that with the additional power one MIGHT be able to attain >such a high climb angle as to affect the gravity flow from the cowl tank to >the carb....thus leaning the engine sufficiently to cause low power output, >and with full throttle max climb, if one raise the carb so high that the fuel >woulddn't flow then even in a glide, one might not have time enough to refill >the carb and float bowl, and lines and gascolater before making the off field >landing.... > >I have never calculated the angle where this would happen ...but suppose one >could with the mains on - say 12 inch blocks, then moving the tail down to >attain a very high angle of "climb"; moving the tail down until fuel stops >flowing to the carb....This would be fairly easy to do. > >Seems I do remember someone mentioning that they had replaced the fuel line >from the firewall to the gascolater, with a smaller diameter line than >specified , and the flow restriction at full power was sufficient to lean out >the engine so that it would only run at partial power.. > >On some cowl tanks, the feed lines are in fact adjustable in the tank..... >maybe if that type of cowl tank is installed, then the line is set too >high...... > > >Hope these thoughts help stimulate other thoughts and you find the >cause....the solution. Is somethi8ng floating around in the cowl tank to stop >up the outlet ???? > >Fly Safe - Have Fun > > >Regards, > >Harry >
<<attachment: winmail.dat>>
