Rob, Thank you Regards Jarek On Sun, 10 Jan 2021 at 22:14, Rob Thompson <[email protected]> wrote:
> Non Genuine means means a part which does not come from Limbach with a > *release > form*. > Yes many limbach parts are just off the shelf parts re branded "Limbach". > Some parts are made in special production runs by companies like Mahle and > Bosche. > In Australia, to drill extra spark plug holes we would require an > engineering approval. > regards > Rob > > Rob Thompson > 0429 493 828 > > > > On Mon, Jan 11, 2021 at 5:37 AM Jarek Steliga <[email protected]> > wrote: > >> >> >> Rob, >> >> What does 'non genuine heads' mean to you? >> From the very beginning, Limbach has been using only VW and Porsche >> serial products. >> >> The Limbach cylinder head is part of the series production of plants that >> continue the production of spare parts. >> >> Limbach has never produced cylinder heads in-house !! >> I think there are mechanics who have already repaired such an engine and >> know all the technical data of the Limbach L2000 engine. >> >> Ps. If I take off my certified cylinder head and drill holes for the >> second magneto set, then what would you say to that, Rob? >> >> Do you also think that the Limbach plant produces its own valves? Or >> maybe nuts and bolts ???, they are also certified for these parts? >> >> Regards >> Jarek >> >> >> >> >> >> ---------- Forwarded message --------- >> From: Jarek Steliga <[email protected]> >> Date: Sat, 9 Jan 2021 at 08:34 >> Subject: Re: [DOG mailing list] Backup electronic ignition on Limbach >> 2000 / Dimona >> To: Laurie Hoffman via dog <[email protected]> >> >> >> Thank you >> >> On Thu, 7 Jan 2021 at 23:58, Rob Thompson <[email protected]> >> wrote: >> >>> Limbach previously used TRW valves which are very common in VW rebuilds >>> but I think (but not sure) genuine VW uses Mahle. >>> >>> Limbach changed to a new type a few years ago which are not branded. The >>> stems are magnetic and the heads hardly magnetic at all. So the valve heads >>> must be a mostly stainless alloy. >>> >>> Problem with all stainless valves is that the stems have a habit of work >>> hardening and breaking. Particularly when used in combination with hard >>> seats. Many valve seats are stellite hard faced to cope with unleaded fuels. >>> >>> Sodium valves would be interesting to try but it still comes back to the >>> certified / non-certified engine issue. >>> >>> regards >>> Rob >>> >>> Rob Thompson >>> 0429 493 828 >>> >>> >>> >>> On Fri, Jan 8, 2021 at 9:35 AM Michael Stockhill <[email protected]> >>> wrote: >>> >>>> Does anyone have an opinion on stainless steel valves or other >>>> aftermarket stuff. Sodium cooled valves would certainly appeal to me. I had >>>> a 1972 VW camper with a later generation air cooled engine. It swallowed a >>>> valve at 40,000 miles. VW had a recall that changed out the solid valves >>>> for sodium...seemed to be a good fix at the time. >>>> >>>> Can we verify that the current Limbach valves are stock VW? >>>> >>>> Michael Stockhill >>>> >>>> On Thu, Jan 7, 2021, 1:44 PM Rob Thompson <[email protected]> >>>> wrote: >>>> >>>>> Hi Jarek, >>>>> *Before you change to non genuine heads please make sure you are fully >>>>> aware of the legal and insurance implications!* >>>>> >>>>> - You need to remove the old heads and measure the combustion chamber >>>>> volume. >>>>> See https://www.youtube.com/watch?v=yqAr4DUqEt4 >>>>> >>>>> - Measure the OD of the cylinder top flange. Sorry I can't remember >>>>> the figure. >>>>> >>>>> - Give those measurements to whoever is machining the heads. >>>>> >>>>> - Limbach heads have standard VW size valves and guides. They >>>>> previously used TRW valves but the current ones do not have any >>>>> identifying >>>>> marks. >>>>> >>>>> - I do not have any idea which are good brands. You would think that >>>>> Great Plains should be of reasonable quality. Check out the homebulders' >>>>> forums like this one >>>>> http://eaaforums.org/showthread.php?9071-VW-Aircraft-engines-Tell-me-about-your-experiences >>>>> >>>>> regards >>>>> Rob >>>>> >>>>> Rob Thompson >>>>> 0429 493 828 >>>>> >>>>> >>>>> >>>>> On Fri, Jan 8, 2021 at 7:44 AM Jarek Steliga <[email protected]> >>>>> wrote: >>>>> >>>>>> >>>>>> 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 <[email protected]> >>>>>> 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 <[email protected]> >>>>>> >>>>>> >>>>>> 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 <[email protected]> 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, <[email protected]> >>>>>>> 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 < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> Rob, >>>>>>>>> >>>>>>>>> Thank you. >>>>>>>>> >>>>>>>>> Regards >>>>>>>>> Jarek >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Sun, 3 Jan 2021 at 22:46, Rob Thompson <[email protected]> >>>>>>>>> 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 < >>>>>>>>>> [email protected]> 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 < >>>>>>>>>>> [email protected]> 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 < >>>>>>>>>>>> [email protected]> wrote: >>>>>>>>>>>> >>>>>>>>>>>>> Thanks, Rob, >>>>>>>>>>>>> >>>>>>>>>>>>> I knew that once. Sod old age. >>>>>>>>>>>>> >>>>>>>>>>>>> M >>>>>>>>>>>>> >>>>>>>>>>>>> On Sat, Jan 2, 2021, 5:27 PM Rob Thompson < >>>>>>>>>>>>> [email protected]> 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 >>>>>>>>>>>>>> [email protected]) >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> On Sun, Jan 3, 2021 at 12:05 PM Michael Stockhill < >>>>>>>>>>>>>> [email protected]> 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 < >>>>>>>>>>>>>>> [email protected]> 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 < >>>>>>>>>>>>>>>> [email protected]> 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 >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>
