skippydiesel

2 hours ago, Geoff_H said:

I await your advice on availability, let me know.  I will suspend my research.

Cheers PS I still have not found a property to store my current project

Geoff - it is still available but being honest (&  not seeing a likely candidate just at the moment) I am telling you it may not be for long.

2 hours ago, Thruster88 said:

Get the RV4 Skip, you won't regret it. You only live once. Of course you would have to embrace that prehistoric technology residing up front😂. Good thing about the RV's it will be worth more when you sell it in the future.  

I do love my Rotax - please dont ask me to list the reasons why.

The RV 4 - really gets along but 32 L/hr and the rest ++++ if its opened up, the noise, vibration and a stall speed (best not say as I cant figure out how its RAA registered). Tempted though. Cant do anything until out of CV19 lockdown - will this ever end?

6 hours ago, IBob said:

I can promise you it's not 'probably ineffective', Skippydiesel:
My tank breathers emerge under the wing, and I can vary the take from L vs R tank by cutting slightly different (forward facing) angles on them.

Interesting - how have you determined this?

5 hours ago, kgwilson said:

The reason they protrude a bit is so I can put the cover with the "Remove before flight" tag on easily. It is just a bit of pvc clear tube that fits over the aluminium breather to stop the bugs getting in. Also I reckon the airflow is a bit higher there. The 45 deg angle must create more positive pressure as the opening is double the area of the tube cut flat.

The point with exiting into a positive air pressure area, is that you dont have to try and "capture" the apparent wind by having potentially damageable/damaging pipes.

6 hours ago, Geoff_H said:

Skippy you don't seem too keen to sell. Maybe you will do it yourself!  When lockdown is finished I will contact you to see if you are still selling.  If so I will go to the Oaks.

Its like this Geoff -Over the last 18 moths + , I have researched about 12 LS class aircraft that "grabbed my fancy". Of these I contacted about 1/2 of the vendors. I actually "checked out" (went and had a look) at three. They were geographically distributed in south Qld / north NSW & very far south NSW. The closest, to me, was 4.5 hrs away. No small commitment in time & money.

All of the following had passed through the financials negotiation stage and a price agreed.

• One failed the flight test due to CO poisoning - I was just too crook to negotiate, after the 30 minute flight (could have been longer but I felt so crook)to discuss anything. On reflection this was probably the best potential purchase - the CO problem  turned out to be easily fixed. Such is life.
• The next - had my bags packed, maps drawn on, electronic Nav flight plan entered and the vendor emailed me to say he had changed his mind - bitterly disappointed.
• The last - all agreed but the "broker" insisted on a sales contract, absolving every one (including me) of any responsibility for every possible situation, including the discharge of the sales contract itself - I refused to sign. Tried to negotiate directly with owner, no doubt he had been influenced by broker and would not get involved - no sale. Regretful but I wonder,  what defect in the aircraft, might have been hidden/avoided by the sales contract - did I actually escape a possible "lemon".

So, we arrive at this day and I am beginning to think, - if I had just got on with fixing my Zephyr, I would now be enjoying its superlative flight characteristics once again.

Latest fantasy is an RV4 for sale in Vic. Always liked them. Have had two wonderful flight in the same. One, over Lake Okanagan, BC Canada - from 50 ft above lake surface to 4000ft and some gentle aerobatics. The other, at The Oaks, NSW, - pristine home built, piloted by builder - again gentle aerobatics (not so low) and flight up to about the same 4000ft.

So yes, if matters aircraft do not get resolved very soon, Zephyr will not be for sale.

6 hours ago, turboplanner said:

I just want to make it clear in the light of your post above that the lockdown decisions are made by the people appointed to make them, the Chief Health officers and NOT by the State Governments. The video certainly seems to have entertained some people, along with setting off an apparent grubby politician trend, but has very little to do with Australia.

As I said before Turbs me old mate - if you dont think the grubby hand of Government(s)/politicians, is not heavily influencing its public servants, in this case Chief Medical Officer(s),  its you that's dreaming. I wish you were right on this but unfortunately, near 30 years a public servant, has convinced me you are completely naive in your position/comments. Sorry!

Brilliant Jerry!!!!!!

16 hours ago, kgwilson said:

Venting via the cap a simple & cheap way to do it but won't create as much positive pressure as how I have vented mine. 

 

I installed 3 tanks in my aircraft and the vent on each (2 in wings & 1 in fuselage) exit the tank at the highest point and then go straight down through the bottom of the wing/fuselage about 25mm and are cut at a 45 deg angle into the airflow. This maintains a positive pressure in each tank. I have not bothered with a finger strainer & have not had issues with bugs. They are easily tested by creating a suction with the fuel cap off. The tank end and the exit end are 1/4" aluminium tube with clear plastic tube between each bit.

Excellent work - just being picky (cause I can);

• Why project more than a few mm below the aircraft "skin" ?

and

• Why bother with the aesthetically pleasing but probably ineffective, 45 degree angle into apparent wind?

At the end of the day - the system(s) that work will depend on the chemical composition of the adhesive.

The best removal process will always be:- If you dont have prior knowledge/expedience (of that material), start with the least likely to damage your aircraft (paint/fabric/structure) and you ( dermatitis/ allergy/ carcinogens) and after correct application (system/time) you fail,  progress to the next level and so on.

3 hours ago, derekliston said:

Neither of those, simply saying I am of no help because I have no idea of the efficacy or otherwise of your suggestion and no need to find out because what I have is, for my requirements, perfectly adequate. If I had any idea or suggestions I would tell you!

Its a perfectly viable option, used in many aircraft, with the added benefit of less chance of water egress. It also reduces/removes concerns about boundary lair / turbulence / chance of low pressure zone, impacting negatively, on your fuel delivery system.

4 hours ago, IBob said:

To add detail to that:

The vent is forward facing, but tucked behind the strut to avoid overpressurising the system, which would risk structural damage. And the tanks are then cross-vented to give equal pressure in each side, with the aim of delivering equally from each tank and avoiding transfer of fuel between tanks.

I would speculate that:

• the forward facing bit is just aesthetics - there would be no benefit in terms of pressure capture.
• behind the strut is probably more to do with A reduced chance of damage from passing skulls B reduced chance of damage to passing sculls.

The positive pressure will vary according to location and angle of attack - the shape of the breather will have little impact on the pressure entering the system.

Rubber/latex stick. Put this up erlier but it seemed to disappear:

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13 hours ago, derekliston said:

Neither on my part, just that I have no idea!

Are you seeking an explanation or just dismissing my suggestion ?.

OR

neither for or against apathy?

10 hours ago, onetrack said:

eBay is your best bet.

 

https://www.ebay.com.au/itm/303884344155

I find the powered ones just seem to crate a more dispersed mess.

13 hours ago, rhtrudder said:

Where can I get a rubber stick 

Art stores, some automotive paint places and high quality carpentry supplies

I am interested to know why know one has taken me up/to task, on venting into a high pressure area?

Is it lack of understanding or disagreement.

2 hours ago, derekliston said:

Probably is possible, but why would you?

Human frailty!

If it can be done wrong, someone sometime, will probably do so.

1 hour ago, rhtrudder said:

Tried citrus also carby and brake cleaner , surely there’s something that would dissolve the glue but not the paint

Did you try the rubber stick?? - that's what I used to remove the adhesive, when I replaced my fabric - works a treat but does require a bit of muscle power. The stick is a mechanical removal system - it seems to "grab" the adhesive , role/ball it up until it drops off - simple!

Isopropanol is the same alcohol used in most hand sanitisers, the skin wipe before you get the jab, etc - in hospitals & wipes its usually 70% or less. You can purchase 100% from cleaning product supply shops.

5 minutes ago, derekliston said:

Nothing fancy about my forward facing vents and they work quite satisfactorily!

Is it possiblew to put the cap on facing backwards - if so the possibility of venturi effect greatly heightened

Start with an eraser stick (I think its pure rubber or something) then the lest likely to do damage - as per JG3. If works great, if not try isopropanol, diesel,  petrol, then paint thinner ( 2 types)

2 hours ago, NT5224 said:

Thanks for the discussion folks but no clear response to my question.

 

Switching from forward facing air vents  to just open top ones, will that effect my fuel flow?

 

Cheers 

 

Alan

Probably not BUT as I said erlier you can have a positive pressure in your tank without exposing your system to the possibility of water egress. Just plumb your breather (s) into a high pressure area (underside of your fuselage/wing/wherever.

On my Zephyr I have combined both my main & auxiliary tank (both in fuselage) vent line into one. It goes up to the highest point, of the fuselage, does a loop and then straight down (a bulkhead), exiting into the hopefully high pressure air zone below the fuselage. Seem to work - never had a problem.

Sorry didnt address the Q - My point in the above description, is to demonstrate you dont need any fancy forward facing vents, you just need to vent into a high air pressure zone, to get positive pressure in your tank(s)

4 hours ago, Old Koreelah said:

 

 

Despite all that experience, some designers seem to get it right. I was amazed to see one European aircraft has a pinhole vent on the trailing edge of each wing

Yeah! The ones I know, of have wing tank vents on upper tip ,trailing edge of upturned (not quite winglets) wing tip. Puts the vent above the tank max fuel  level but would seem (to me) to be in low pressure zone. They work.

4 hours ago, Thruster88 said:

I don't see why not. It would require a LAME to issue a maintenance release just like any other certified VH aircraft. The LAME would go thru the logbook and rectify any deficiencies in the previous maintenance, this would happen anytime a LAME signs out a new to them aircraft regardless of its previous history.

Sooo! it behoves the owner to maintain the certification.

2 hours ago, Thruster88 said:

Certified status will not change if maintained by an L1 for private operations. If the aircraft was later returned to a RAAus flying school then an inspection and sign off by L2 would be required.  

Could it go back to VH certified ?