Hello again, I'm just wondering if Great Plains will be able to make exactly the same copies of the Limbach's head on the four points of the spark plug. I have already contacted the Limbach company and in response I received these words: "We do not provide any technical data and parameters regarding the construction of Limbach L2000 heads" In this case, making a copy of the heads is problematic. Does anyone know the technical data of the Limbach head. 1. Head bore for 90mm MAHLE 90ZN4 cylinder. 2.Combustion chamber size. 3. inlet valves diameter. 4. diameter of exhaust valves. 5. type of valves, what is the diameter of the stem. 6.Type of valve guides. 7. What manufacturer of heads to use to copy the Limbach head. There are Brazilian, Mexican and even Chinese heads ..., the latter apparently turn out to be very solid in the opinions of car mechanics, but I guess what matters to us is the opinion of aviation mechanics.
Regards Jarek . ---------- Forwarded message --------- From: Jarek Steliga <jarekstel...@gmail.com> Date: Tue, 5 Jan 2021 at 20:47 Subject: Re: [DOG mailing list] Backup electronic ignition on Limbach 2000 / Dimona To: Laurie Hoffman via dog <dog@lists.riverland.net.au> Rob, Ian, Thank you. I live in Poland and have my Dimona registered here. We have been governed by EASA for quite some time. Regards Jarek On Tue, 5 Jan 2021 at 09:05, Ian Mc Phee <mrsoar...@gmail.com> wrote: > The great planes heads may need machining to match the Limbach. Also there > is, a, Limbach SB re matching heads to cylinders. About 20 years, ago > Limbach introduced marks on cylinders, and heads and you need to look at > char to check what goes, with what. > > Personally I would give sr no of engine to Limbach and they will make up a > dual port head and more recently they have improved the underside of thrir > heads and a little more metal. Yes will cost more. The coils are as used > on Honda, Gull Wing motorbike from guess 80s. > > I do know of a, L2400 engine that got Sauer to make special heads for the > Limbach as Sauer had much more finning on heads, than Lim ach were using. > The engine ran for 10 to 12years, perfectly but then they were > "discovered" and owner was grounded for think 18 months. . The owner got > Mike Byrne's to to the EO to fit the heads and is all legal. > > Ian McPhee > +61 428847642 > Box 657 Byron Bay NSW 2481 Australia > > On Tue, 5 Jan. 2021, 10:06 Rob Thompson, <amessageto...@gmail.com> wrote: > >> If you buy the Great Plains cylinder heads, they will machine them to the >> right cylinder size but you will have to adjust the size of the combustion >> chamber to get the correct compression ratio. >> *Please Note: I have not used these Great Plains heads and in most >> countries you will have to get "Experimental" registration approval to >> legally use them. * >> regards >> Rob >> >> Rob Thompson >> 0429 493 828 >> >> >> >> On Tue, Jan 5, 2021 at 7:11 AM Jarek Steliga <jarekstel...@gmail.com> >> wrote: >> >>> Rob, >>> >>> Thank you. >>> >>> Regards >>> Jarek >>> >>> >>> >>> On Sun, 3 Jan 2021 at 22:46, Rob Thompson <amessageto...@gmail.com> >>> wrote: >>> >>>> Hi Jarek, >>>> The rules and regulations are supposed to stop people doing stupid >>>> things but they also stop people doing sensible things. >>>> >>>> Great Plains Aircraft sell dual ignition heads.... >>>> http://www.greatplainsas.com/sccylheads.html >>>> >>>> If you buy these you can always put your Limbach heads back on if you >>>> want to turn it back into a "certified" motor. >>>> >>>> >>>> regards >>>> Rob >>>> >>>> Rob Thompson >>>> 0429 493 828 >>>> >>>> >>>> On Mon, Jan 4, 2021 at 7:18 AM Jarek Steliga <jarekstel...@gmail.com> >>>> wrote: >>>> >>>>> Rob, >>>>> >>>>> Question is, is it better to have a certified Limbach engine (which >>>>> has not been modernized for 50 years), or to introduce a second ignition >>>>> system and be 99% sure that in a critical situation it will save your >>>>> life. >>>>> It is strange that such an engine was certified at the time. >>>>> There is no problem with drilling, as you can see. There are already >>>>> plants that do it on request, but only in the US. >>>>> It is strange that Peter Limbach himself or his successors have not >>>>> introduced this system to their product so far. >>>>> >>>>> Generally, SLICK has a mandatory service of 250h / 2 years, but mine >>>>> was about 40h / 2 years old and the rotor had to be replaced, the engine >>>>> had already been working badly, so having a secondary ignition system you >>>>> can feel more confident by 99%. >>>>> >>>>> >>>>> Regards >>>>> Jarek >>>>> >>>>> >>>>> >>>>> >>>>> On Sun, 3 Jan 2021 at 18:11, Jarek Steliga <jarekstel...@gmail.com> >>>>> wrote: >>>>> >>>>>> Thank you. Looks like none of these has ever been tried by members of >>>>>> this mailing list. >>>>>> >>>>>> Regards >>>>>> Jarek >>>>>> >>>>>> >>>>>> >>>>>> On Sun, 3 Jan 2021 at 04:19, Michael Stockhill <sto...@gmail.com> >>>>>> wrote: >>>>>> >>>>>>> Thanks, Rob, >>>>>>> >>>>>>> I knew that once. Sod old age. >>>>>>> >>>>>>> M >>>>>>> >>>>>>> On Sat, Jan 2, 2021, 5:27 PM Rob Thompson <amessageto...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>>> Limbach requires a 250 hour magneto inspection on >>>>>>>> single ignition motors. >>>>>>>> >>>>>>>> https://limflug.de/en/support/downloads.php?type=technicalBulletins&id=905.700.020.305.pdf&action=download >>>>>>>> >>>>>>>> regards >>>>>>>> Rob >>>>>>>> >>>>>>>> Rob Thompson >>>>>>>> 0429 493 828 >>>>>>>> (Please note that my new email address is amessageto...@gmail.com) >>>>>>>> >>>>>>>> >>>>>>>> On Sun, Jan 3, 2021 at 12:05 PM Michael Stockhill <sto...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> While most mags have a 500 hour inspection interval, with the >>>>>>>>> Limbach mag being direct drive, and firing with wasted spark, I >>>>>>>>> believe it >>>>>>>>> has some interesting environmental issues. It turns much faster than >>>>>>>>> other >>>>>>>>> applications and fires more frequently. After seeing my last mag at >>>>>>>>> 250 >>>>>>>>> hours, internally it looked more like a 500 hour mag to me. Hence, I >>>>>>>>> have >>>>>>>>> decided on that inspection/overhaul interval. Having only one is a >>>>>>>>> good >>>>>>>>> incentive. >>>>>>>>> >>>>>>>>> Does anyone else have any observations or thoughts on this? >>>>>>>>> >>>>>>>>> Michael Stockhill >>>>>>>>> Polson, MT >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Sat, Jan 2, 2021, 4:31 PM Rob Thompson <amessageto...@gmail.com> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> There are a number of secondary ignition systems designed for >>>>>>>>>> Aero VW motors. See http://www.greatplainsas.com/scsecign.html >>>>>>>>>> The electronics are easy and cheap. >>>>>>>>>> The difficult bit is that you have to drill the bottom spark plug >>>>>>>>>> holes precisely so that you can get a wrench between the pushrod >>>>>>>>>> tubes. If >>>>>>>>>> you go ahead, get your engineering company to practice on an old set >>>>>>>>>> of >>>>>>>>>> heads. >>>>>>>>>> This modification will turn your Limbach L2000 into an >>>>>>>>>> uncertified motor unless you can get a suitable engineering approval. >>>>>>>>>> regards >>>>>>>>>> Rob >>>>>>>>>> >>>>>>>>>> Rob Thompson >>>>>>>>>> 0429 493 828 >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Sat, Jan 2, 2021 at 11:36 PM Jarek Steliga < >>>>>>>>>> jarekstel...@gmail.com> wrote: >>>>>>>>>> >>>>>>>>>>> Hello and all the best in 2021! >>>>>>>>>>> >>>>>>>>>>> Dimona with the Limbach L2000 engine does not have a second >>>>>>>>>>> ignition system, because the manufacturer of these engines for >>>>>>>>>>> unknown >>>>>>>>>>> reasons did not introduce such a safety system into production. >>>>>>>>>>> Do you believe a modification now is possible? Or maybe some of >>>>>>>>>>> you have already made such a modification with a Limbach L2000 >>>>>>>>>>> engine >>>>>>>>>>> equipped with one SLICK 4330 type magneto in your bird. >>>>>>>>>>> In the US it is a popular solution and even all companies offer >>>>>>>>>>> ready-made kits for such modification, which is definitely >>>>>>>>>>> additional >>>>>>>>>>> safety during the flight. >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> https://www.kitplanes.com/electronic-ignitions-2/ >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> Best regards >>>>>>>>>>> Jarek >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>
