alf jessup

Scott,

I guess i wasnt thinking when i said about the shadowing effect with the kingpost being there as I am topless now and dont have the kingpost or wires to worry about, but mind you when I had my old set up on the ST3 wing i had no shadowing effect on mine as the long aerial was pointing up off the top of the kingpost factory mounting bracket and the rubber diapole one was pointing down.

McGuyver

My next step if this set up i used didnt work satifactory was going to be the v rabbit aerial like you have as I have heard they are quite good.

Cheers

Alf

John, hence my use of the '~' symbol.........

All I can say is that the most common engines in the world in aircraft, aka the Lycoming and Continentals don't run a gearbox and they don't rev at 5,800rpm! They chug along at a low rpm well within their limits and they practically last forever.

 

Brent,

 

Very true about the lyc's and continentals.

 

Cars dont run direct drives and neither do bikes and they can rev out to upwards of 18000 rpm and they have gearboxes, have water cooling with plenty of hoses and they dont wear out all that often.

 

I used to see the difference between water cooled and air cooled bikes when i had them over the years, the air cooled ones all used to loose there crispness over a period of time due to the expansion and contraction of the cylinders, where as the liquid cooled ones had a more uniform temprature rage all the time and lasted much longer

 

What we have in the 912 is a very proven engine over a very long time.

 

I am sure the Jab's will prove themselves over time as they are relativley new on the scene and might i say are going a might fine job.

 

Yes I know I am comparing car engines to aircraft ones but all in all they all are a just a peice of metal with lots of moving bits to create some form of momentum for us to harness.

 

Cheers

 

Alf

Scott,

I dont seem to be suffering anymore shadowing since i moved the antenna from the strut to the keel and I am betting you will have the same result.

Cheers

Alf

Scott,

Looks good mate, short and stubby so it shouldnt be an issue i dont think with a prop strike, hope you happy with your reception.

BTW i am using a microair 760 with my set up and it has proven to work fine, i still havent put on the fibreglass aerial that came with the strutt mount kit, I had it on the strutt but it didnt work as good as the original wire one i had when it was on the strutt..

Cheers

Alf

I think from what i have been told Hotham (Dinner Plain ) is something like $75 to land on in fees, so that works out to 75 cents a meter if your going to use 100 meters, me I would use full flap and ask for a price per meter and get off and stop asap, if not just use 1/4 throttle and get your moneys worth of their bitumen.

126.75 i think is the frequency and over 4000+ amsl.

Nice looking runway also, i have flown over it quite a number of times heading to Porepunkah and back

Cheers

Alf

Mike,

Also forgot to mention in my last post it could have also had some ice build up in the intake area which could have broken off and went through the carby.

Alf

Mike,

Sounds to me like a serious dose of carby ice, probably broke off the butterfly and deadened a cylinder for a few seconds, chunks of ice have been know to hit the plug tips and close the gaps.

I'm guess it was carb ice but that is only my opinion.

I have heard of a 6 cylinder Jab motor at my local getting carby ice on taxi and I'm guessing it happens to the 4 cylinder ones also

Cheers

Alf

Pete,

Just go buy some good quality tie wire and a set of tie wire pliers, cant remember what gauge it is but will look at mine when i'm next out at the airfield and let you know.

Cheers

Alf

Scott

It's all trial and error and i am sure you will work it out fine and i am also sure you and the boys up there will be far happier with the performance of the radios with this set up than with them set up on the strutt.

Cheers

Alf

Scott,

On mine the bottom rubber duckie can get to 1mm from the prop tip at its lowest point (bar fully forward) but that is only if you bend the rubber duckie back towards the prop tip hence that is why i angled it slightly forward.

If you go straight down like in your one it will be close to the prop arc and about an inch or more below the tip with a great possibility of being sucked into the prop.

With mine as soon as the bar comes off the front strut the duckie is well above the tip of the prop.

The only reason i put a bit of sash cord from the lower part of the flexible duckie to the keel wires at the rear was, 1. a bit of redundancy in the off chance the prop could suck the flexible part of the duckie back into the 1mm tip of the prop when the duckie is at its lowest point (control bar fully forward (not at all likely to happen) and 2, it will stop the antenna from undoing and would also prevent it going through the prop if it did some how happen to fall off.

I put a little thought into it before i made it.

Cheers

Alf

I can resend you the photos when i get back home if you wish to relook at them

Scott,

Should work fine mate, one thing for sure is it will work 10 times better than on the strut and that i will have a small wager on lol.

Cheers

Alf

Ray / Scott,

Just wondering if you have made up and tried out the keel block for the aerial and what your results have been if you have, me I am very happy now with mine.

Would be interested to hear from you.

Cheers

Alf

While attempting to remove left carby bowl on a friends 912 to check and fill the bowl as it hadn't been started in 3 months I put the very slightest upward pressure on the carby and the rubber flange pulled out from the mounting plate to the manifold.

Very surprised by the amount of pressure i applied to the carby while trying to get the bowl clip off for it to do this.

The machine has only done 160hrs TT, luckily for me I had 2 spares as i changed mine out recently just for the sake of changing them.

Could have been a fault with this flange as I have appleid far more pressure to mine and never had a problem, the rubber that failed still looked looked brand new.

Puzzling !!!!!

Cheers

Alf

Oh by the way all to you ga pilot licence holders out there i'm not intending to bag you all out i am just trying to say we are not all perfect and Mr Nan narrow mind needs to open his eyes and get off his pedestal and maybe get contact lenses so he doesnt have to look down his nose over his glasses at us mere mortals who fly other aircraft that dont have VH on the side or wings.

Alf

Geez Doug,

How come at my airfield it's always the ga trained pilot flying in that hasn't looked at his ersa that does his circut in the wrong direction or does the flyby down the centre of the runway at 500 ft with a tear drop turn past the end of the runway then lands or the cessna from moorabbin that makes no inbound calls at a aerodrome near me then enters circut without a call and then flys his final 20ft underneath a trike who has made all appropriate calls and is on final about 60 ft up and then doesnt even realise what he had done wrong (mind you they were not good speakers of english), yep if that is what they teach you no wonder every one is deserting the hi cost aviation sector.

Have a look in your own nest before crapping in ours.

Recreationonal training is as good as the person that is teaching it as is yours.

Cheers

One of these untrained flyers

Bass,

I put about 200 ml of water in a glass jar and mark the jar at the water level, then add about 500 / 600 ml of fuel into the jar and shake the bejeezus out of it and then let it settle for 5 or so minutes, if the water level rises above the mark the fuel has ethanol in it.

That is what and how i have been shown to detect ethanol in fuel.

Cheers

Alf

Fuel only from the same major retailer and own test conducted at intervals for ethanol for this service station i use, 2 x 20 lt plastic fuel containers and Mr funnel when fueling the trike.

Never a drop of fuel ever been in the tank without going through the funnel and fuel tank always topped of completely full prior to coming offshore to work for 2 weeks.

And fuel tank drain after every fill and prior to next daily flight even if no fuel was added.

Alf

Mark,

Drop the carby bowls off (check and see if there is anything in the bowls) and give the float needles a tap as could possibly be a bit of crud holding the float needle open causing the carby to flood at idle revs.

Even with the bowls off and ignition switches off pull the motor through a few times as this will flush the float needles out.

Thats what is sounds like to me.

I'll give you a call from work when i get out there Tuesday.

Cheers

Alf

Ray & Scott,

I just been flying and didnt take my camera, I am just heading to watch my son play footy then off to Melbourne to take my mum down for her herart surgery tomorrow,

Will be back later tonight so will try and get some photos of it tomorrowe( monday) before i head offshore for my 2 weeks.

Cheers

Alf

Ray,

You have tundra tyres and I dont, anyway i fixed the problem and the radio works 5 times better now that with the airborne strut set up.

I got a block of nylon about 4 inches long machined up exactly the the same as the keel extension post where it goes into the keel.

It is held in place by the pin that holds the keel extension when inserted into the keel, I also tapered it down about 10mm towards the rear which bought the small aerial away from the prop and ran with the original cabling that use to run up to the kingpost.

The antenna is now away from from the electronic interference aroung the engine and now there is also no shadowing.

It cost me 60 bucks to get a machine shop to make it and it is the best 60 bucks I have spent.

I will try and get a couple of photos of it tomorrow and send them to you, trust me it is a far better set up than on the strut (atleast it is for me)

Reception and transmit is crystal clear now.

Cheers

Alf

Im not happy at all with the reception and transmitting of the new aerial on the undercarridge strutt as when I transmit it effects my skydat by shooting the egt's off the scale and making the alarm flash on while the button is pressed, i think the power generated by the radio coming out of the antenna is radiating to the instrument module box on the top of the engine.

I might turn over the antenna so the long one is on the bottom but i will have to use my old wire one as I can bend it to shape so it does not hit the ground as the new fiberglass one will be too long.

McGuyver do you have any details on this mounting out of the keel tube extension, do you cut down an extension tube so it does not stick out as far, also would you clamp it or drill out the extension tube, I am also gathering this would only be suitable for the V rabbit aerial.

My new aerial that i got with the sst wing works nothing like my old one ontop of the kingpost on the ST3 wing, frankly i think it was a waste of money.

Cheers

Alf

Welcome back were you Ben Hidin.

Cheers

Alf

I think all the decisions made were good ones as they are all here still to talk about it, we all at sometime in our flying career will get caught out by the weather, I have and have survived the experience and made me a little wiser.

I have never taken off when conditions have been not favourable but have looked at forecasts and trusted them only to be caught out by the unexpected not forecast situation.

we will never live in a perfect aviation world but as long as we learn from our experiences and take it onboard we may just live to fly another day like these guys have.

I say if you keep tempting fate one day it will bite you.

Cheers

Alf

My condolences to the wife and familys and passengers family.

If you continue to play with fire eventually you will get burnt if your lucky, in aviation you dont get too many chances.

Watching the video I was amazed the poor fellow lasted this long, not condoning his piloting skills in any way which he seemed to have, Just condoning his lateral thinking in doing it in this type of aircraft and let alone with friends in it.

Yeah looks great for all your friends to see you doing these awesome manovers but do it my yourself as you have the life of your friends in your hands, so all out there before you decide to beat it up have a think about the concequenses as you don't get any deader the death itself.

Fly safe and let us all learn something from this unfortunate accident.

Alf

Hi Ray,

Well time will tell on the strut as of this morning i removed the old one I had on the kingpost from the strut where I had it installed while waiting for the new on to arrive,

Only have a short lenght of cable now instead of 4 meters coiled up with this new one.

All I am waiting on now is the weather to calm down as it is blowing it's butt off here and the SST is itching to go flying, hmm maybe that is me itching to go.

I will let you know the results as soon as I can get airborne.

Cheers

Alf