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skippydiesel

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Posts posted by skippydiesel

    Hose Fitting

    in Engines and Props

    Posted

    29 minutes ago, Blueadventures said:

    I posted a few times that Flylight in Uk sell 17mm I.D. Silicone  4 ply hose full set including clamps for 912 and 2 meters hose and a 90 degree about 80£

    Well there you go - must of missed that. Will get a price and compare with RoTax AU supplied 17mm ID coolant hose. Thanks

     

    Found it! https://www.shop.flylight.co.uk/engine-service-parts-72-c.asp

     

    Straight  17 mm ID silicone hose $28.50 per M (will need 3M)

    90 Elbow 17 mm ID silicone hose $23.75 each (will need one on standard configuration)

    • Subtotal $109.25

    Above as a kit is now $151.98 but includes hose clamps which can be purchased locally (ie a saving)

     

    Then the cruncher DELIVERY ?? - in common with the USA, Pommy delivery is almost exclusively courier and very costly?

     

    (RoTAX Au starting to look like it may be competitive - will get a price during the week)

    Hose Fitting

    in Engines and Props

    Posted

    50 minutes ago, Blueadventures said:

    I have 25mm silicone hose; only use 4 ply.  No issue with it last 2 years.

    Thanks Blue - my question is not about using silicon hose as such  but about using 5/8" (16mm) ID hose pushed onto 17mm OD spigot/barb. (I assume your 25mm ID is going on to 25mm OD spigot).

     

    From earlier post:

    My questions are;

    • Will the Gates silicon 5/8" hose fit, without damage,  on to a 17mm OD spigot/barb?
    • Are there other factors that I should consider?

    The reason for my question is the lack of straight (as in not shape molded) 17 mm ID coolant hose, on the open market - You can purchase it from RoTAX at an exorbitant price.

    RAAus access to class C and D airspace.

    in Governing Bodies

    Posted

    13 hours ago, Area-51 said:

    Comes back to the type equipment  installed; certified or not certified; there will be no concessions offered to Ra aircraft wanting to enter Charlie, parallel minimum GA requirements will need to align.

    So you agree, the entry criteria is likely to focus on equipment carried ( ie com, transponder, etc) rather than build type.

    Hose Fitting

    in Engines and Props

    Posted

    Update: It seems that Mackay (Australian manufacturer of automotive hoses, amongst other things) make a wide range of 17 mm ID molded hoses - the above question is now moot  but I would would still be intersted in the experience of anyone fitting silicone hose to a larger OD spigot.

    Started a spare parts list

    in Aircraft General Discussion

    Posted

    Back to 17mm ID Coolant Hose:

     

    Mackay PN CH4195 17mm ID x 430mm Long.  $11-$27 various vendors in Au

     

    While you are checking this out - have a look at  Mackay Catalogue, you may never have to purchase from RoTAX again.

    Heater hose 17mm ID, pages 44-45.

    Radiator Hose 24-25mm ID, Page 53-55 

     https://mackayrubber.com/pdf/hose_ID_listing.pdf

     

    For list of Australian sellers see bottom of page https://www.mackayrubber.com.au/automotive

    • Informative 1

    Hose Fitting

    in Engines and Props

    Posted

    While I am fanatical about using the correct size (ID) of hose relative to its spigot (OD) I recognise that sometimes a smaller ID hose may do the job just as well.

     

    (NOTE: I said smaller ID - never use a larger ID hose, it is almost guaranteed to leak and be insecure on the spigot/barb)

     

    EG Rotax specify that 17mm ID coolant hose. A little over 2m in length is required for most 912 engines. 17mm ID is awfully hard to come by, unless you purchase from Rotax, at an exorbitant cost.

     

    The well known/respected brand Gates, only do 17 mm in some preformed/shaped hoses - you would have to purchase several to achieve the 2m + required a potentially  a costly exercise.

     

    Gates do supply silicone coolant hose  in ID 5/8" (15.875mm). 

     

    I am under the impression that silicon hose is considerably more flexible (stretchy) than the usual "rubber" hose.

     

    My questions are;

     

    • Will the Gates silicon 5/8" hose fit, without damage,  on to a 17mm OD spigot/barb?
    • Are there other factors that I should consider?

    Small plane missing Victoria 18/09/22

    in Aircraft Incidents and Accidents

    Posted

    Currently trying to get a straight, low km,  1999, Suzuki SV 650 S back in to good working order.

    Pig of thing to work on, compared with the bikes of the pre 1980. It's just a fun project/ challenge to do, no intention of riding it (other than a test ride on our very quiet semi rural dead end street).

    Will offer it to you guys once, all the nigeling little problems of years of neglect have all been sorted and its registered again.

    • Like 1

    Oil filter wrench for Rotax 912 filters.

    in Aircraft General Discussion

    Posted

    2 hours ago, turboplanner said:

    Out of date now, too many people were getting the filters off so the engine designers mounted them upright, but under the vehicle near the sump, so you need two; one which loosens the filter from the top, which also needs a knuckle joint to get under some electronics and one to spin the filter on its top from underneath.

    So far this filter remover has not failed me - mowers, cars, generators, tractors - all done!

     

    The beauty of it is the "strap" is some sort of spring steel, with raised dimples for added grip. The strap is very thin, so access has never been an issue and the tightening mechanism easy to manipulate, even in difficult access situations, to get a good grip. I even managed to do a filter on a Suzuki Vitara - the worst access I have ever come across.

     

    Anyhow access to aircraft filters is easy, due to being able to remove the body (cowling) so I am not sure what you are referring to.

    Started a spare parts list

    in Aircraft General Discussion

    Posted

    In hoses my focus has been finding suitable substitutes for oil & radiator - I have forgotten about the 17mm ID coolant hoses.

     

    Seems that there is nothing available (except from Rotax) in straight hose BUT you can purchase the following molded/shaped hose in 16.5 & 17 mm ID which can then be cut to the required lengths.

    Note: Most installations will require a little over 2m in total, you will have to purchase more than one of the preformed hoses, so be sure to compare the total price with Rotax supply.

     

    02-1579  16.5mm

    02- 1249 16.5mm

    02-0912 16.5mm  x 755 mm long

    02-1415 17.00mm x 280mm long (see below)

    Gates Heater Hose - 02-1415

     

    Gates Silicone comes in ID 16mm (5/8) straight & formed. Silicone hose is usually super stretchy, so I assume  16mm will push on to a 17mm spigot/barb. 

     

    https://www.gatesaustralia.com.au/-/media/files/gates-au/heavy-duty/application-data-sheets/heavyduty-product-range--silicone-coolant-hose.pdf

    • Informative 1

    Pipistrel on Fuel Vaporisation

    in Aircraft General Discussion

    Posted

    Below is an excerpt from a letter circulated by Pipistrel & published by RAA in its recent news letter (see full letter)  PVS-2304_2024-Circular_letter.pdf (raaus.com.au)

     

    "Date: 23th April 2024 Subject: Vapor lock preventive actions, applicable to all Pipistrel aircraft equipped with Rotax 912, 912 iS and 914 engine types

     

    NOTE: Steps specified below act as additional content to the existing procedures outlined in the applicable aircraft flight manual.

     

    BEFORE FLIGHT:

    • If temperatures rise in the area of run-up, it is advised to increase RPM above idle in order to force more air through the engine compartment, which will maximize the cooling.

    • If aircraft is equipped with auxiliary/booster fuel pump, pay attention to its sound – any significant “non-standard” deviation in pitch of the sound could indicate presence of the trapped vapor.

    • After takeoff, reduce climb angle to increase airflow through the engine compartment, which will maximize the cooling.

    AFTER FLIGHT:

    • If situation permits, park the aircraft with nose pointing into the wind.

    • Before shutdown, let the engine cool down at idling.

    • Keep the doors opened – this will allow heat to escape from the cabin, which is especially beneficial at configurations with fuselage tank installed."

     

    Not having access to the Pipistrel "flight manual" I don't know what additional information it may containe on the subject/management of fuel vaporisation - I am concerned that the above letter does not go nearly far enough in that it has failed to refer to:

     

    • the main/most likely time for this phenomena to occur, is on the ground, after flight, on a hot day 
    • opening any inspection doors/hatches to allow the hot air from heat soaked engine to escape more readily.
    • fuel pressure indicators (other than a vague reference to boost pump, if fitted, sound)
    • hot starting problems
    • the assistance a correctly fitted return fuel line will give in helping to minimise/alleviate this problem.
    • the safety implications in not having a boost pump.
    • the need  to run the boost pump until posative/acceptable fuel pressure is achieved - this may include during attempted start.
    • extended run up time, to not only assess the engines condition but to further aid in clearing fuel vapour from the system.
    • having a "plan" should the engine not deliver full power/die on take-off/climb out.

     

    The advice to :

    "..........let the engine cool down at idling." may not be good , in that most aircraft will taxi, inducing a flow of air through the cowling/cooling systems befor shut down. Further engine running while aircraft is stationary may only exacerbate the heating of fuel lines, leading to a greater chance of vaporisation. I would recomend stopping the engine as soon as aircraft has parked.

    Keep the doors opened – this will allow heat to escape from the cabin, which is especially beneficial at configurations with fuselage tank installed." will do no harm , it sounds like BS to me. While it is desirable to keep all onboard fuel cool, the fuel stored in the tank(s)will not be influenced by the heat from the engine, which is the main generator of the problem, often referred to as "vapour lock"

    RAAus access to class C and D airspace.

    in Governing Bodies

    Posted

    Looks hopeful.

     

    I realise that only a small percentage of RAA pilots will want to take advantage of entry to controlled air space (CTA) BUT for this few it's not just a convenience, it's also a safety matter. 

    Large sections of the Australian eastern seabird has become CTA, forcing transitioning RAA pilots in to sometimes scarry low level transit lanes or flying around CTA over large areas of "Tiger Country".

    This has always been a far more important privilege to try for than the doubtful benefits of the empire building Group G achievement.

    • Agree 1
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