Thanks again Kurt On Fri, Nov 3, 2023 at 2:13 PM Rob Thompson <[email protected]> wrote:
> - The Andair FS16 fuel shutoff valve (andair.co.uk/) is approved In > Australia. I guess (but don't know) that the approval trickled down from > EASA or FAA. These valves require a 1/8" NPT male to 14mm male adaptor. The > only adaptor I could get needed drilling out to ensure adequate flow. > - The undercarriage rod-ends are Hirschmann standard design > - UC straps - Diamond Aircraft would have a monopoly on these. > > No videos that I know of. > > regards > Rob > > Rob Thompson > 0429 493 828 > > > > On Sat, Nov 4, 2023 at 7:46 AM Kurt Redinbaugh <[email protected]> > wrote: > >> Hi Rob >> Thanks for your prompt responses and support! >> Have you a source for the time limited parts for the H-36, specifically >> the rod end bearings, fuel shut off valve and the landing gear bow brackets? >> A search for these part numbers on the net does not get any results for >> me. (Please excuse the poor sentence structure but you get the idea,,,) >> Has anyone done a YouTube of the 3000 hour inspection? >> Thanks again >> Kurt >> >> >> On Wed, Nov 1, 2023 at 5:32 PM Rob Thompson <[email protected]> >> wrote: >> >>> Attached is the 3000hour inspection schedule. Check that everything is >>> still current. >>> >>> In Australia our Gliding Federation (GFA) manages registrations so to do >>> a 3000 hourly you need to be a GFA authorised maintainer with a Survey >>> Rating from them. A GA maintainer can only do the inspection if the >>> aircraft is registered as a GA aircraft....which very few are. >>> regards >>> Rob >>> >>> Rob Thompson >>> 0429 493 828 >>> >>> >>> >>> On Thu, Nov 2, 2023 at 9:55 AM Kurt Redinbaugh <[email protected]> >>> wrote: >>> >>>> I fly #3660 in Nevada and am coming up on the 3000 hour inspection. I >>>> have not noticed the aileron issues noted but am concerned because this >>>> ship is tied down on the ramp with full covers during the summer months >>>> when we get temperatures over 100 degrees f. Your pictures of the bearing >>>> issues would be very helpful in determining the condition of the bearings >>>> in #3660. >>>> Who can I find that is qualified to perform the 3000 hour inspection? >>>> My A& P with IA is an instructor at Abaris Training here in Reno and >>>> consults with all the leading airframe manufacturers worldwide so I am >>>> comfortable that he understands composites. >>>> The nearest Limbach service center is in the UK. Who can I use to tear >>>> down and inspect my engine stateside? >>>> I did send the prop to Hoffmann for IRAN with satisfaction (expensive!) >>>> Thank you for your posts-they are always informative. >>>> Kurt >>>> >>>> On Mon, Oct 30, 2023 at 9:49 PM Ian WIlliams <[email protected]> wrote: >>>> >>>>> Hi All, >>>>> >>>>> I thought you all may be interested in the following >>>>> >>>>> >>>>> >>>>> 1. We have finally got our replacement prop from Hoffmann (10 >>>>> mths) and was rather expensive so when I was told a forklift fork had >>>>> gone >>>>> thru the box in transit my reaction was rather predictable. >>>>> Fortunately it >>>>> was not damaged >>>>> 2. Before this happened, I had contact with Airmaster props here >>>>> in New Zealand. They could produce a really nice little constant speed >>>>> prop (electrically operated) which would be a real plus for the L2000 >>>>> Dimona”s. However I got a call from the head honcho of NZ CAA >>>>> airworthiness >>>>> who totally rejected the idea. (being a type certified aircraft) Hence >>>>> the >>>>> Hoffmann prop. However now the Limbach engines no longer have EASA >>>>> approval, that may change the H36 type certificate to enable “special >>>>> Category” or even “experimental” so if there is anybody interested in >>>>> installing an Electric Airmaster prop that will fit on an L2000 Limbach >>>>> (correct rotation) let me know as I have organised 2 blades (Made by >>>>> Sensnich). >>>>> 3. I think the cracked ferrells of the props has been caused by >>>>> excessive temperature and humidity levels in our uninsulated, shingle >>>>> floor >>>>> and wet hangar over a long period of time. So I am thinking of a >>>>> controlled >>>>> heated insulated blanket over the prop and engine. Raychem Autotrace >>>>> heating cable seems a good suggestion or a slightly modified electric >>>>> blanket. >>>>> 4. Currently I have almost finished an annual inspection on H36 >>>>> S/No 3667 ZK-GPH It has been a real mission. I found a turnbuckle >>>>> fork >>>>> end of one of the thrust cables under the engine was broken .. and had >>>>> been >>>>> so for a long time so was held only by lock wire. Quite strong lock >>>>> wire I >>>>> reckon >>>>> 5. I have ferried it around NZ for subsequent owners and the >>>>> aileron control was unacceptably stiff, to a point of “sticking” when >>>>> operated. Making it a really unpleasant little rocket to fly. >>>>> >>>>> This H36 was not a Thai one, but was imported to NZ from Italy (tho >>>>> German registered D-KEBA) in 2010. However it does have the early >>>>> “aileron push rod in compression when both ailerons are forced upwards. >>>>> This was a design problem which was corrected with later serial No’s which >>>>> had the rods in a tension mode. The aileron bell crank for the older >>>>> Dimona’s is fabricated from tube while the later (tension) bellcranks are >>>>> made up of flat plate and there is only 3 bearing sets in the wings as >>>>> opposed to 5. >>>>> >>>>> >>>>> >>>>> Now for the jucy bit .. >>>>> >>>>> We made a detailed inspection of each of the 10 bearing sets (5 per >>>>> wing) with a small camera and found some of the bearing sets (3 ball >>>>> bearings pointing inwards on a 3 piece metal “holder”) mounted on wooden >>>>> mounts ie the control rod passed thru the bearing sets and through a >>>>> hole >>>>> in the mount. We found that some bearing sets were not installed dead >>>>> centre of the mounting bracket hole The over all clearance being about 1 >>>>> to 2 mm. >>>>> >>>>> The upward load on the ailerons of the H36 when doing say 90 Kts is >>>>> REALLY high. And I think is underestimated. Hence the compressive load >>>>> into the pushrods is also VERY high forcing the rod to bend like a snake. >>>>> Putting a high lateral load to each bearing set. >>>>> >>>>> So with misaligned bearing sets some of the bearings were not touching >>>>> the rod hence “rubbing” on the wooden bearing set mounts. So that is why >>>>> the ailerons were really stiff in flight but seemed OK on the ground >>>>> >>>>> >>>>> >>>>> To repair was a mission. We didn’t want to put holes in the wing so >>>>> designed a cutter system which we made from a short length of brass >>>>> turned it down to 18mm, put an 8mm thread in one end, rounded off the >>>>> other >>>>> end and drilled a hole thru the thing used a 6mm drill cut off and a >>>>> cutting edge ground so it protruded from the brass”slug” about 3 -4 mm. >>>>> we then used an old push rod with the “slug” on one end and a battery >>>>> drill >>>>> at the other and with great care, removed the mounting bracket material as >>>>> close as possible to the metal bearing fittings. >>>>> >>>>> >>>>> >>>>> So it still needs a test flight but problem solved. I think Hoffmann >>>>> has issues because prior to changing the push rod configuration, there >>>>> were >>>>> about 5 different variations of bearing sets in the wings. >>>>> >>>>> >>>>> >>>>> If any of you want to see some pictures of the procedure let me know. >>>>> >>>>> >>>>> >>>>> Our Dimona (ex Thai) bearing sets had a solid nylon outer including >>>>> the outer ball race, so we had no choice than to make big holes and >>>>> replace >>>>> them. As they all were seized Another Ex Thai (currently being >>>>> restored) >>>>> didn’t have ball type bearings, just Teflon (or nylon rings) S/no 3667 >>>>> fortunately had proper bearings (ie with a metal outside ball race) and a >>>>> nylon “tyre” against the push rod. >>>>> >>>>> >>>>> >>>>> So I thought you all may be interested. I am astounded that the >>>>> aircraft has been flying for over 40 years like this and would be >>>>> interested in your comments >>>>> >>>>> >>>>> >>>>> Best regards >>>>> >>>>> >>>>> >>>>> Ian Williams >>>>> >>>>> Drury >>>>> >>>>> Auckland >>>>> >>>>> New Zealand >>>>> >>>> >>> --------------------------------------------------------------------- >>> You are subscribed to the Dimona Owners Group mailing list. >>> This list is archived in public. http://waikeriegliding.com/dog/ >>> To unsubscribe, send email to: [email protected] >> >>
