facthunter

Silly TO use it then,.. . Nev

Now it all will be done by Digital fakery so not as Impressive as THIS is.. View it if you can. Nev

It's NOT about the grinding technique or whether you are happy. with your motorbike forls. It's about Hydrogen embrittlement. How does the Brains trust here think THAT Issue should be handled?. This IS important because unless the problem has miraculously vanished chroming bit's of load carrying structure on Aircraft that fly, is a no no Unless they are Post plating heat treated and It's done properly. It's little different in principle to heat treating other alloys. It either meets the spec or it's not legal(or safe) Nev

Not to actually achieve tightening them. Just to Look as if it would. Nev

No . they are supposed to be angled so as to tighten them Nev

Those Big metal domes in the middle of intersections were known as SILENT COPS Repairing the ALLOY sumps of diesel trucks after they got "dinged" made me good money .. Same as Lawnmower alloy bases . A real good money earner. Nev

GWH did you even try to check up anything before you wrote that your man is an expert and that Hydrogen embrittlement is not an issue? If he hasn't taken the trouble to do a bit of research HE"S NOT an expert. Welding wet or stripping plating or even electroless plating can cause embrittlement Hydrogen in storage under pressure causes it in pipes and containing vessels This IS a safety matter regardless of whether some one you know doesn't bother about it. CASA had an extensive article on it. What you have said is irresponsible. I hope you can see that. Now i'm going to get another bloody argument that shouldn't be happening. Nev

I flew a BRAND NEW on it about '64 and the NEW smell inside was something to remember. Also that one is never going to fly better than it does then. Nev

Chroming stuff can cause Hydrogen Embrittlement. Don't do it on load carrying parts unless treated properly post plating (and not long after). Nev

How closely did you look into the construction. What's a new C172 worth?

I didn't go the RC way. The costs were approaching that of a real tigermoth from Fawcet at Camden if I recall correctly. They had them with a NEW engine or with hours to run at about 1/2 the figure Nev

They KNOW where you live. Nev

I think we have less and less people who are interested in detail. We used to have people here who designed and built Planes and would talk to us. Now "where the fugarethey" Hands up those who built model planes. Where have we come from and are going to? Trouble is we are in the air and share it and it that's not well done everything else is of no consequence. You will most likely have a big scare and decide to do something else. Probably weather elated because there's a lot of that to spread around.. Then it gets BACK to why am I spending all this dough when it's NOT really THAT much fun.. IF none of this is relevant to your circumstances FINE and Bully for You. (remember that one.? If you do you're probably. too old to be flying. . Climbing mountains skiing robbing banks selling your body etc And there you have it. Nev

brendan I have been documenting it....HERE I don't think it will fly. nev

Your finger or you head.? GEEZ space this is depressing . aero motors have to be able to take full power, first time. Friction takes away power and makes heat. You are actually getting a lot out of your Plane . Nev

I've observed instances of uneven compressions with the 912s after using Leaded fuel and in every case it came back Ok after about 2 tanks. of Mogas. Don't bother with Leak down tests It can be felt when burping the oil back IF you are used to the normal/right feel. If you are as fussy as, you take the heads off and reseat the valves but NOT pulling engines apart UNLESS you must is best.. This is not new information. Nothing has changed in the last 20+ years. IF it further deteriorates after returning to mogas. get onto it. Rotax 4 stroke Heads are NOT a problematic item generally. Judgements have to be made in these things on a balance of informed possibilities. On other occasions I've said don't ignore a new vibration feel of engine beat etc find out what it is and I've said engines don't fix themselves. WE are changing a causal factor by eliminating it and having a good chance of success. Nev

The LOWER spark plugs will often show the effects of TEL build up first . with 4 stroke FLAT type motors. If in a hurry the mechanic checks them FIRST. There's also ground running procedures where you can clear the fouled plugs by leaning the mixture at a relatively low power setting say1800 rpm for a Lycoming. Do it into wind if possible More likely with planes that do a lot of taxiing' with a rich mixture. Yes I reckon Lead would Pug up 2 stroke rings. The oils are matched/ formulated to running piston temps though and that's going to vary. Build up on the Crown can be dust, carbon Lead and almost any sort of thing including oil additives and metal wear particles. Some friction modifiers short out spark plugs More likely where the motor is one that uses a lot of oil.. Nev

Yeah, it's a bit hard on people coming the other way. Nev

Rotaxs's don't like 100 LL They run the heads too cool for the lead to flow but I reckon ONE part tank full won't damage it. Incidentally, Lead doesn't help GUIDES unless it was a real old thing that runs really hot made last in the 20's. Nev

Probably time expired. Like we are. Your motor could run on LPG. or even town Gas. I don't really know what NATURALGAS is but that must be the best IF it's NATURAL. Nev

Welding under water is something else.. nev

Tight for the first Five Hours? Maybe Dog works in mysterious ways after all? Nev

Eastern Victoria has certainly had a time of it. Nev

It's ALWAYS your choice. ASHES to ashes and dust to dust and all that. You might last for longer than you think . There's a bit of an art in keeping old motors going. Not a lot of expense. Nev

I wouldn't give you a "Guarantee" on the weather ANYWHERE.. If you ask the locals (You have some here) and watch BOM for a while you should be able to get a good indication of developing systems and plan accordingly. "Ordinary" but flyable with a good instructor is fine. He well earn his "Meagre" money and you will get an EXPERIENCE. I recall one time at Lethbridge,I was UP with a pretty good student and it was his OWN aircraft. He said "I don't seem to be getting the Hang of it so well TODAY. I said WELL LOOK... WE are the ONLY ones flying. All the OTHERS are in the clubhouse. so obviously the conditions are NOT ideal. so don't expect too much. Nev