skippydiesel

2 hours ago, Blueadventures said:

Alloy heads so alloy, plus manufacturer of Skyranger provide a set of two alloy pipes so you just need the join hoses.  Other manufactures should do the same as it over time saves cost of the long runs of hose required 5 yearly and no hoses to flop around where ever not supported.   I have images of the pipes in the Nynja thread. 

Alloy heads & alloy pipes but are they the same mix of alloy??? Even welding stainless steel with the correct rods can sufficiently change the mix to accelerate electrolysis.

I managed a fisheries reserch station years ago - amazing how electrolysis can "eat" ferrous metals & aluminium (alloy) boats. Even impellers on pumps just disintegrate after a few months. As far as practical we moved to plastics to reduce the cost of electrolysis.

Sure, the coolant we use in engines are supposed to prevent electrolysis but why make its job harder?

2 hours ago, Blueadventures said:

Re 'B' agree and with home made in s/s best to place a few low height weld bumps to prevent slippage.    I myself now buy (pay the bit extra) for purpose made alloy joiners that have groves to prevent slippage.  Cheers

Why alloy? - just sets your engine  up for a potential corrosion/electrolysis situation. Keep the number of different metals, in contact with the coolant,  to the minimum. All the more so when Gates make a range of "plastic" joiners designed for the environment/job?

2 hours ago, cscotthendry said:

When I did my rubber replacement, I took my existing hoses to all the auto parts stores to try and match them. I still ended up buying a couple of hoses I didn't use. The retailers are usually pretty good at taking them back if you haven't modified them.
For Rotax engined planes, you might have to
A) buy OEM hoses from the manufacturer or
B) make a new setup with pieces of hose and home made joiners made from lengths of 25 mm tubing.
Plumbing anything, but especially airplane coolant systems is the worst task you can take on. Nuthin' fits nuthin'!

One big point ;

Item B - I strongly suggest you do not go down this rout. Gates make very good 'plastic" light weight,  hose connecters, in diameters suitable for your hose (as mentioned previously ). These connecters are designed for high temperature fluids & hose security. 

We are talking aeroplanes here - not ground based equipment/vehicles. 

For many Rotax 9/radiator set ups it is nearly impossible to purchase a single hose connection for each of upper & lower (minimum 4 joins). Most often one hose must have a joiner (6 joins) often both (8 joins). Each join is a potential failure point - keep the number to the absolute minimum for your application.

https://www.gates.com/us/en/fluid-power/engine-hose/coolant-hose.html

https://www.gates.com/us/en/knowledge-center/resource-library/product-catalogs.html

Gates Automotive Catalogue (pdf) - https://www.gatesaustralia.com.au/~/media/files/gates-au/automotive/catalogues/hose-application-catalogue-aus-nz-january-2018.pdf

Gives you shapes & dimension.

For ID 25mm, elbows -  try Holden Drover (Suzuki Sierra) Page 107 Part Nos 02-1011, 02-1012, 20-1013

Not sure now, but it was possible fairly recently to get a Gates catalogue on line.

3 hours ago, BirdDog said:

Hey Skippy.

 

Spent another hour in there with them this morning, and again left empty handed.  No.  Never mentioned an aircraft.  They basically told me that unless I know the exact Gates part, they can't help me.   So I would have to sift through the catalogue and then give them a part, and they can order it in.  Best they can do.

 

We put a gauge on the hose this morning - 21mm (but slightly expanded because of the nipple) I am going to cut this one in half and measure it where the nipple has not stretched the tube.

 

Coolant bowl (or whatever its called) is what the radiator cap screws on to.

Inexplicably Rotax call this the expansion tank - Rotax 9's dont have an expansion tank.

Did you try for a Holden Gemini radiator hose?

On 03/04/2022 at 9:31 AM, BirdDog said:

 

I called both Repco and Supercheap. Both said they don't have anything appropriate - hence why I came here.

 

The search results I got on the forum where quite old, so I asked the question.

 

I use the Constant Tension clamps.  They hold niceley, and I have a hose cutter too.  Great tool to have.

 

 

Don't tell me - You let slip the hose is for an aircraft ??????

I have a 30 year relationship with my local Repco - the last of the origination service people (Dave) is terrific. Don't know what I will do when he retires. Font of knowledge. On the rare occasion, doesnt know, he will find out for you, even if it doesnt result in a sale for him.

Believe me,  Repco have the Gates agency, so they will have or be able to get, what you want. May be try another Repco store. If they ask whats it for - tell them its for a pump (true an air pump) you are building/repairing/servicing/whatever just not an aircraft (until you have built a relationship)

On 03/04/2022 at 9:56 AM, BirdDog said:

 

Yeah man!!  Mine appear to be all 19mm ID.  

 

When did Rotax go to 19mm ID radiator hose? - mine is 25mm (1")

On 03/04/2022 at 9:27 AM, BirdDog said:

 

Hi Pluessy,

 

I need two lengths about 30cm long or so, from the radiator (with the 90 degree) and then one small bit that goes from the coolant bowl to the thermostat. 

What is a "coolant bowl" ?

Paying (some) ridiculous fees to land/use what were public airfields is but a symptom of a greater malaise.

It seems to me that Australia had the potential to steer a rational (ha!) course between the socialist welfare state (high taxation) and conservative economic rationalism (user pays & high taxation). What we have instead is a dogs breakfast where there is little or no understanding of economic/social synergy and the concepts of stand alone/ user pays pretty much rules the day. A demonstrably failed philosophy.

The most extreme example of user pays, is the good old USA. What a social & economic disaster it is - do we really aspire to this sort of nightmare?. The huge population (that is a market unto itself as well as the World) is the only thing that stops the USA disintegrating (it will happen one day).

Some of the Scandinavian countries (many similarities with Australia - small population, hostile land mass, etc) demonstrate the success of the socialist welfare state (may be a bit too lefty, not sure I want to go there either)

There must be a better way, where those in power do not sell off our/public assets, for a quick cash grab and then force us to pay again, to use those same assets we have already & continue to pay for through multiple levies .

I have no objection to paying landing fees to privately owned airfields or even a fee to public airfields, that recognises the difference in utilisation (wear/tare/space/ services/etc) between a sub 600kg aircraft, - 6 tonne -  40 tonne plus. If its going to be user pays, charge a fee commensurate with the utilisation.

Rant over.

59 minutes ago, djpacro said:

Moorabbin simply had enough of RAA pilots avoiding payments and I can understand that having read a large number of online posts from pilots who avoid paying any landing fee whatsoever. 

 

Me thinks you not only exaggerate horribl (the number),  you also oversimplify the reasoning - all any of us (I suspect you included) want is to be treated consistently fairly - is this too much to ask/expect from our public entities (private & public)?????

This topic has been exhaustively discussed in the past.

I use Gates hose, supplied by Repco.

Every application is different however you might find that Holden Gemini (pre bent 90 degrees) hose will do the job for you. 

You will almost certainly have to trim to fit whatever hoses you purchase. Get a proper hose cutter to do a neat/accurate job -something like this cheap one does a great job (a little silicon on the blade helps).

I also purchased Gates radiator hose joiners (through Repco)

GATES Part # 28603

{1/2" - 1/2" Plastic Hose Connector}
Category: Hose Straight Connector

GATES Part # 28623

{1/2" Elbow Plastic Hose Connector}
Category: Hose Elbow Connector

Be sure to use the correct hose clamps. Smooth edges and surface worm drive - not the serrated drive jobs OR invest in  (Norma Constant Tension) but you will need the applicator pliers to go with them.

No experience, just repeating conventional wisdom - Blade number should be kept to a minimum for best weight, aerodynamic efficiency and cost. 

Consideration for more blades - Propeller clearance ie two blades can not be optimum length  length due to clearance (ground/airframe) restrictions for HP available - Aesthetic/Fashion pressures

There is evidence that more than two blades may, during take off, deliver greater initial acceleration. There is little if any evidence to suggest this continues beyond initial ground role.  Countering this is the evidence of reduced aerodynamic efficiency and weight that will negatively impact on the aircrafts flight "envelope"

Some suggestion of smoother operation/noise due to more frequent & smaller "pulses" from the propeller however this perception may be as much to do with the airframe to prop relationship, as blade numbers.

A ground adjustable two blade propeller, optimised for climb, is likely to deliver the best result but may not meet your aesthetic expectations.

I used Toledo D Sub crimpers - worked a treat for a one aircraft job. From memory $70 new. Make sure you select the correct  tool for the wire gauge  - See IBobs comments above.

From memory Toledo do three D-Sib type connectors. The smallest are probably what you need - Try Toledo D Sub Crimpers 31024 wire size range AWG 26-20,

Had quit a few "views" but no reply's -  "Pitch Paddle" is what Whirlwind call their ply wood devise that facilitates the use of standard digital and/or bubble propeller pitch angle protractors.

Something like this is needed when checking/adjusting Whirlwind props as they are convex  (closest description I came up with for their aerofoil shape) on both sides. Most props have a flat section that allows the protractor to be pressed or clamped to the back side of the blade.

I may have misread/understood  - has not the stall speed (45 knots) been left as is for the time being. Effectively preventing many heavier aircraft from joining RAA. Sure this will be reviewed but how long will the process actually take?

WANTED! - Whirlwind  Pitch Paddle adapter OR plans on how to make one.

18 hours ago, spacesailor said:

It Will get worse, when Badgery creek starts up.

Their flight is path over Prospect Reservoir area.

That's were we sit here & watch the light planes pass over. On their way to Bankstown airport .

Lots of houses being sold here since in was shown were the flight path would cover. 

spacesailor

Yes! Even now, due to CTA & Tiger Country, there is no really safe exit from the Sydney Basin, unless you are heading south. The commissioning of Badgerys Creek will, I am sure only exacerbate the dangers for light aircraft operations.

"Lots of houses being sold here since in was shown were the flight path would cover." 

The idea that aircraft operations will bring intolerable noise and danger is deeply entrenched in the population (thanks in large part to scaremongering politicians). The facts, diametrically opposite to the fearmongering,  around around large aircraft noise & safety standards are just not vote getters.

15 hours ago, APenNameAndThatA said:

That is fascinating. I wonder if technically it is therefore illegal to fly the Univat (? spelling) (University of Queensland to Mt Gravatt) VFR corridor. You have to fly at 1000 ft, and it's right beside the CBD. I don't think this matter passes skippy's common sense test, but. I have never read those regs and this is probs why. 

I would make the same observation about the Light Aircraft Corridors that give access for aircraft wishing to travel between Sydney SW to NE (Hunter Valley) crossing a large swath of Sydney at very low level (CTA above) - I have been a frequent user but always concerned about the limited options available to me in the event of a forced landing. Common sense would have me flying at a much higher altitude than that available or alternatively providing a more westerly light aircraft corridor (through military air space)

1 hour ago, kgwilson said:

Their service and delivery is quick but their cost for freight to me straight up the Pacific highway at $40.00 compared to $13.00 from Flightstore was the difference.

Thanks - Good to know.

I have found Skyfuel  (nation wide distribution) to be very professional @  https://www.skyfuel.com.au/product/aeroshell-oil-sport-plus-4/

37 minutes ago, danny_galaga said:

They started off in WA. they came to Darwin JUST before cyclone Tracey which I theorise would have really increased their fortunes. The store I worked at in Darwin I believe was the first Bunnings outside of WA

I live , therefore I learn 

On 09/03/2022 at 7:59 PM, ClintonB said:

I’ve done it in Hawaii, but when you are the only one in a car park moving, it gets confusing with no one to follow. 
l.

Bragger!  not just in Hawaii but in a car park too . I take it the non movers were waiting for your lead, local customs can be confusing.

Hi Rob,

Would you be interested in an unused, complete,  Sonex Mk1 Rotax 912 engine frame/bed adapter?

On 15/03/2022 at 3:07 PM, danny_galaga said:

When I worked for Bunnings in the mid 90's a couple of Americans came in. They were buying up all the metric told they could find- tape measures rulers etc. They told me they were on a fact finding mission. Of course they could have just gone to Canada but I guess the mission either coincided with other work out else it was just a junket 😄

Bunnings were around in the mid 90's ????

Thanks DeanT - I have gone for the epoxy/lead shot option.