Hello, I apologize for laboring the point, but what is the max static RPM on your H36 / Limbach 2000 / Hoffman H0-V62 prop? Do all of you reach consistently way above 2500 RPM?
Best regards Jarek On Wed, 1 Jan 2020 at 12:28, Jarek Steliga <[email protected]> wrote: > Hello Rob, > > Thank you for your reply and all the best in the New Year! > > Yes, I have synchronized the carbs with vacuum gauges. The readings were > pretty consistent throughout the range of throttle opening. However I > noticed how throttle butterflies will not track together as they open wide. > They are both fully closed at idle but aren't aligned at full throttle. > Should this worry me even if both sides seem to be synchronized when it > comes to the vacuum values? > > > Best regards > Jarek > > On Sun, 29 Dec 2019 at 22:45, Rob Thompson <[email protected]> > wrote: > >> Have you synchronised the carbs to make sure the throttle butterflies are >> tracking together with a full range of movement? >> regards >> Rob >> >> Rob Thompson >> 0429 493 828 >> >> >> >> On Mon, Dec 30, 2019 at 6:05 AM Jarek Steliga <[email protected]> >> wrote: >> >>> >>> Ian, >>> >>> Thank you. I will definitely look at both plungers. >>> >>> Best regards >>> Jarek >>> >>> On Thu, 26 Dec 2019 at 00:00, Ian Mc Phee <[email protected]> wrote: >>> >>>> I go on colour (av gas for testing for colour), CHT (do all 4 >>>> digitally) and maximum deviation is 8deg C but often ass low as 5 deg C >>>> and EGT with a cheap dual analogue and it is of limited use. >>>> >>>> I seem to remember the bottom jet and needle controls fuel at 80% power >>>> to full power and below that is the top jet controls fuel for cruise etc. >>>> >>>> I am more familiar with Bing's these days but the CD150 is similar. 8 >>>> do know if there is any sucking of air inlet manifold it effects both sides >>>> and not just the side of the leak. >>>> >>>> A bit of an aside but been having issues going onto full power on take >>>> off and if done real slow over 15 seconds no issues. Do it over 5 sec >>>> engine would not go full revs at first till you had just broken ground. I >>>> even added extra spring to bring it better to full throttle. Then suggested >>>> to me as was not running rich it was a pin hole in diaphragm but was >>>> perfect BUT on second carb I noticed some scour marks on engine side of the >>>> plunger with the needle. I polished the aluminium first with emery then >>>> worked up with 400, 600 and 1200 wet and dry. Totally fixed. Plunger was >>>> binding or sticking on its way up. So simple to fix. This has been creeping >>>> up on me over 9 months. >>>> >>>> >>>> Ian McPhee >>>> +61 428847642 >>>> Box 657 Byron Bay NSW 2481 Australia >>>> >>>> >>>> >>>> >>>> >>>> On Thu, 26 Dec. 2019, 09:01 Jarek Steliga, <[email protected]> >>>> wrote: >>>> >>>>> Hello Martin, >>>>> >>>>> I did the very opposite thing! Suspecting that it was the insufficient >>>>> supply of fuel that caused the problem, I lifted the metereing needles all >>>>> the way up from neutral (flush). This manoeuvre changed nothing except >>>>> (predictably) making the plugs even blacker. The CHT behave normally. I am >>>>> afraid the snag lies elsewhere, but many thanks for your suggestion. >>>>> >>>>> >>>>> Regards >>>>> Jarek >>>>> >>>>> >>>>> >>>>> On Wed, 25 Dec 2019 at 22:30, Martyn Cook <[email protected]> wrote: >>>>> >>>>>> Hi Jarek >>>>>> >>>>>> Maybe now that you have blocked the air leaks around the throttle >>>>>> shaft the engine is running a little rich? That would certainly reduce >>>>>> your peak rpm. >>>>>> >>>>>> I have found getting the mixture correct on each side to be a bit >>>>>> tricky. I adjusted the mixture on mine a bit at a time, watching the >>>>>> degree of "blackness" on the spark plugs, plus the CHT behaviour. But I >>>>>> was taking it for a flight then adjusting when back on the ground. >>>>>> >>>>>> Maybe others know of a way to get the mixture setting correct on the >>>>>> ground? >>>>>> >>>>>> Kindest regards >>>>>> Martyn >>>>>> >>>>>> -- >>>>>> >>>>>> >>>>>> >>>>>> On 26/12/19 9:37 AM, Jarek Steliga wrote: >>>>>> >>>>>> >>>>>> >>>>>> Hello everyone, >>>>>> >>>>>> I have replaced the throttle shafts and the throttle plates. >>>>>> Fortunately it looks like no rebushing will be necessary. The engine >>>>>> became >>>>>> far more stable now and responds precisely to throttle control inputs. >>>>>> Clearly the badly worn out throttle shaft was (at least partly) where the >>>>>> shoe pinched. However, strangely enough, the engine will not rev up >>>>>> beyond >>>>>> static 2500 RPM. See the attached video. I am faced with yet another >>>>>> conundrum. >>>>>> max static RPM 2500.3gp >>>>>> <https://drive.google.com/file/d/17rdy2gc83H4FCpMXqlTOlBn-KBV8kVJA/view?usp=drive_web> >>>>>> Also the engine will not respond to throttle control beyond ca 4 cm >>>>>> before the max power position. >>>>>> >>>>>> I am not sure if it's safe for me to attempt a take off as before the >>>>>> throttle repair, the engine had reved up to static 2600 / 2700. >>>>>> >>>>>> I am looking forward to your thoughts. >>>>>> >>>>>> Best regards >>>>>> Jarek >>>>>> >>>>>> >>>>>> >>>>>> >>>>>>
