Rob you forgot to mention that on two of those occasions when we had prop work done, that there were other faults also.The blades looked like they had been refinished by someone who had never spray painted before. At least once there was an issue with seal installation with grease being sprayed everywhere on use.Laurie
Sent from Yahoo7 Mail on Android On Sun, 23 Jul, 2017 at 6:16 am, Ian Williams<ag...@xtra.co.nz> wrote: Hi Rob,Can you explain the difference in TBO between the BT and T blades ? I thought both were the same.Best regardsIan Williams Sent from my iPad On 22/07/2017, at 7:51 PM, Rob Thompson <post...@hotmail.com> wrote: I just heard that GFA has adopted the CASA rules on overhauling propellers. See http://services.casa.gov.au/airworth/airwd/ADfiles/equip/prop/PROP-001.pdf This means that as soon as it is documented in the system there is no longer a calendar time for overhauls. Ian McPhee has been dealing with Prop Care (www.propcare.com.au) in Brisbane for Hoffman overhauls and hopefully they will be soon doing work on Hoffman props. We are continuing to have a nightmare run with Eric at Australian Air Props at Bankstown. 3 times in the past 2 years our prop has come back to us with problems. OnceWAY out of balance then next time set much too coarse and only pulling 2000 at full power. Then recently he sent it back to us with the counterweights set incorrectly and the rpm was fluctuating on run up and early take off roll. Add to that he charges a fortune because he knows that the only other option in Australia is to send the props to Germany. Up near $4000 now for about 10-15 hours work. Fingers crossed that the Brisbane mob will be able to do them. Rob Thompson0429 493 828 From: dog@lists.riverland.net.au <dog@lists.riverland.net.au> on behalf of Michael Stockhill <sto...@gmail.com> Sent: Monday, 17 July 2017 4:23 AM To: dog@lists.riverland.net.au; Laurie Hoffman Subject: Re: [DOG mailing list] H36 Ignition Switch (and brakes) For what it is worth, the mag switches on my Aztec with similar magnetos are rated at 6 amps 125V a.c./dc. The p lead grounds the primary coil. I found one source that says the primary coil puts out about 150 volts. The secondary coil puts out 10-15000 Volts. 40 amp or even 20 amp rated switch looks like overkill for whatever reason. Maybe consevative because we only get one of them. Michael On Jul 15, 2017 1:29 AM, "Laurie Hoffman via dog" <dog@lists.riverland.net.au> wrote: Hi Tom and Mike, Rob and I have the wreck of an H36 from which we have salvaged many parts for our functioning H36, especially the L2400 which we had top overhauled. Tom, I gritted my teeth and dived back into the wreck to recover the ignition switch and a panel switch. The wreck is already well dismantled however I still had a cow of a job getting access to the switches and removing these. I dread to think how much time it would take to install a new switch in the original position in a complete panel. My strong recommendation is that if you have an ignition switch failure seriously consider installing a new switch in another location on the panel, simply reroute the wiring from the old to the new and then cover up the old switch and placard the new. Although psychically the switch toggles and bodies appear the same, the switches have a very different rating. The panel switch is rated 15A while the ignition switch is rated 40A! The link that you posted to a new switch I just noticed is only rated 20A. Maybe something like this one Tom.... Longacre 45423 40 Amp Weatherproof Toggle switch #1731 | eBay | | | | $ 22.95 | | | | | | | Longacre 45423 40 Amp Weatherproof Toggle switch #1731 | eBay Longacre 45423 40 Amp Weatherproof Toggle switch #1731 in | eBay! | | | | In Oz I have found Narva (driving light manufacturers) switches which look suitable. Heavy duty and this one rated at 50A for 12v. Heavy Duty - Products - Narva | | | Heavy Duty - Products - Narva | | | The wreck is a Mk2 by the way while our operational H36 is a Mk1 so if anyone needs a good Mk2 wing or two, let us know! Re hydraulic fluid, we use only OM16 which I gather is equivalent to 5606. Best Regards Laurie From: Michael Stockhill <sto...@gmail.com> To: dog@lists.riverland.net.au Sent: Saturday, 15 July 2017, 10:13 Subject: Re: [DOG mailing list] H36 Ignition Switch (and brakes) Hi Tom et al I think I found that the MS O rings are okay. Mine were fine through two rebuilds (preventative maintenance each time I put on new tires) over 16 years. Mike On Jul 14, 2017 10:01 AM, "Tom Preisser" <t...@ecoflight.com> wrote: Hi Laurie, I have what I believe to be an ignition switch in my spares. Can't be positive without digging behind the panel to look at my installed switch, but you can check your removed switch against it. The spec is MS 35058-22 http://www.bandc.aero/ toggleswitch-MS35058-22.aspx And I think it could be a different spec to the other fuel pump, etc switches (beefier), given that it has a separate entry than the 15A switches in the old H36 parts manual (with part numbers no longer valid for Diamond)... BTW on brakes (and thanks Mike for your advice)... just now installing a new caliper piston which makes the O ring fit much better in the cylinder (seems I had to take off too much corroded material from the groove of the original installed one, so it no longer sealed tightly)... For those of you running DOT3 fluid, I have obtained some EPDM O-rings to use rather than the BNR (nitrile) MS-28775-218 O-rings supplied to me by Diamond (which they may have sent probably because the HK36 and DA20 use 5606 aviation brake fluid). See this RAS thread for the details on why BNR is not suitable for DOT3...https://groups.google.com/ forum/#!topic/rec.aviation. soaring/4MiwHrkryFg And I talked to a lady who has worked at Cleveland Brakes for decades, and she gasped!! when I said that Hoffmann used DOT3. She says Cleveland only recommends aviation brake fluid - but I'm sticking with DOT3 as per the US type certificate! Cheers, Tom On Thu, Jul 13, 2017 at 7:26 PM, Laurie Hoffman via dog <dog@lists.riverland.net.au> wrote: Hi All, After extensive investigation into intermittent electrical problems eventually developing into a situation where the motor had to be shut down in flight due to rough running, it appears that the culprit is the ignition switch. Physically, the switch appears identical to the other original panel toggle switches operating fuel pump, avionics, strobe etc. Does anyone know if they are the same switch and also is there anyone out there in DOG land who might have specs for the switches? Best Regards Laurie From: Greg Wilson <g...@gregwilson.id.au> To: dog@lists.riverland.net.au Sent: Sunday, 18 June 2017, 8:10 Subject: [DOG mailing list] Easy fit ADSB These are a very easy install and cheap too. https://www.recreationalflying .com/threads/wow-these-are-goo d-looking-gadjets.161803/ Greg Wilson ------------------------------ ------------------------------ --------- You are subscribed to the Dimona Owners Group mailing list. To unsubscribe, send email to: dog-unsubscribe@lists. riverland.net.au
