danny_galaga

I have this tacho in my plane. Rotax 912 specific.

http://www.aviasport.com/Pagina_348.aspx

I must have run it close to an hour by now on the ground. The hour meter is supposed to measure time when the engine is over 1800 rpm. Because I haven't fine tuned the throttle assemblies yet most of the time it's never below 1800 rpm. But it seems to have stopped at 00:22. (I just realised that's in minutes, not 1/10 hours) .  The tacho seems to read rpm reliably.

Anyone have one of these tachos? Am I having a brain fart and not doing something correctly? I didn't think there was anything to do 🤔

On 10/11/2023 at 6:46 AM, turboplanner said:

Yes, but they can start earlier due to this general funding.

An interesting boost for "Flying Car" projects in reviving the use of hydrogen. Not only will it power the car, but it will lift itself (c).

It's going to be  liquid hydrogen, that means it'll be heavier than air.

The tiger has those pressure activated slats too. Dunno if the gypsy does 

15 hours ago, Blueadventures said:

A guess is maybe a fuel line leak or ruptured fuel tank that leaked fuel into cabin area and ignition on impact???  Don't know just a guess as the discussion is about the fire damage and how it occurred.

That was my thought too. Just the right circumstances that the fuel continued to flow while burning in the cabin. A giant kerosene lamp. 

Just googled. Extreme heat due fire can release oxygen in ammonium nitrate, resulting in explosion, like in Beirut. I stand corrected on that front.

Still as you've pointed out, this wasn't an explosion.

1 minute ago, facthunter said:

ammonium Nitrate is a strong oxidiser and will explode with oil or organic matter.   Nev

Doesn't it need a supersonic shock wave to knock the oxygen molecule lose though? Hence it's use as a plastic explosive? Potassium nitrate oxygen molecule is ready to strip off with just heat. 

Dunno if ammonium nitrate would burn. Could be wrong. Potassium nitrate is used by farmers too, that will oxidise aluminium and steel nicely, turned the whole thing into one giant flare. Potassium nitrate, or potash is the oxidiser in black gunpowder and solid fuel rockets. Ammonium nitrate is used as a plastic explosive. Normally needs a shock wave to set it off. I believe American soldiers used to burn C4 as a camp fire fuel in Vietnam, it's that benign.

That's just speculation. I'm not sure there's a reason to carry lots of that in a plane, I would have thought you would normally truck it 

This guy flies a Yak 11, on a relatively low budget

https://www.flyingmag.com/the-intricacies-of-getting-ready-for-reno/

Wake was cancelled for the public because the grounds would be too soggy for all the expected cars. Family only. I think there will be one later for friends. But I happened to be at the field working on my plane at the southern end of the field, so got to see the planes flying from the field. First a jet did several low passes! I think an L-39. Also a Tiger Moth, I think one of the Moths Dave flew regularly. A Cessna Bird dog, Boeing Steerman and Phil's red STOL. 

I attended the funeral of Dave today. Some very moving eulogies from family and friends. Was wonderful to hear things about him he didn't feel the need to mention, like doing humanitarian work in Kurdistan in the 1990's, or teaching vocational skills in the prison system. 

He is missed by many people.

1 hour ago, facthunter said:

Some people get an obsessive compulsion for many things like looking for their Ancestors/ finding the holy grail. I'd like to build/fly a Bleriot XI.   Nev

Apparently the sonar image can distort such that the wings look like that. They will be sending a camera down next so we should soon know.

Are you not flying the same aircraft as GA in RPC?

14 minutes ago, Roundsounds said:

Reported as a a first solo and a C172 that’s been at Camden from new. 

Bugger 😔

Not everyone in our hobby uses Rotax. Even in ra Aus there are a few aircraft with continental or Lycoming engines. If they go to the 760 kg limit then there will be stacks more in the mix. 

And I did post this in the US/Canada section 😉

😲

Dan has a go on ms simulator afterwards. I won't spoil it 🙂

4 hours ago, turboplanner said:

What we are talking about at present is nothing to do with insurance, but has relevance to accidents similar to this one, so it's timely to address the issues.

It seems to me you could say the same things in every single ra Aus crash thread, so why not have a dedicated thread for that subject instead of starting the debate afresh in each crash thread? 

https://www.recreationalflying.com/forums/topic/39585-here-you-can-talk-about-insurance/#comment-558631

19 minutes ago, Thruster88 said:

Just received my rebate for uAvionix tailbeaconX transponder and AV30C control head/EFIS. Removed the Vac system completely and saved 4.5kg. Stil use SkyEcho2 for traffic in on the tablet. It can see the tailbeaconX so a constant verification that adsb out and in is working. The AV30 is a beautiful little EFIS for those that like a traditional 6 pack, gives redundancy of airspeed and alt.

 

Still a few months left to get a rebate.

Damn  that's quite a weight savings 😲

BLA82 is right, we are getting way off track. I'm guilty of that too. There are a number of us here that knew one or both pilots personally.

I myself am disheartened enough it's giving me pause to give up altogether.

Dave wouldn't want anyone to stop flying though.

He would always ask me how I was going with my build. I was looking forward to the day I could say to him 'its done!' 

I can't tell him that now. But I wouldn't want to disappoint him by quitting now.

Sorry, you are of course right. I'm heading to Boonah tomorrow.

56 minutes ago, facthunter said:

IF you are spinning you WILL NOT Increase speed. It will stabilise somewhere near stall speed depending on where your Pitot is located. FLAT spins are the hardest to recover from.. You will only get into an inverted spin by putting the stick well forward. There's a lot to know about spinning and  you are NOT there. and I'm not going into it here in detail. I'll respond to specific questions on Principles. Spins are called AUTOROTATION. What the plane is doing is not directly what the controls position would normally have you doing.  Nev

Understand all that, and that it is not wise to be giving lessons on spins on a forum. You may have misunderstood what I was asking before. Markdun has mostly answered it. I was basically asking if a runaway trim could even cause a stall or spin when it is already all, or almost all UP. Before you even turn to base. In a sense, the only way is DOWN from there. 

And of course I only have my experience with the golf as a guide. The P92 may need hardly any up trim for all I know...

Yeah my only experience with electric trim is the golf, which is generally full up. For me I need it one led down from that. That's not much more up.

32 minutes ago, facthunter said:

 SPIRAL is about right. Spin Lets just say PLANES can be a lot different. Know the technique for the plane you're flying. Your spin recovery is way off so attend to that. The TWO  electric flap motors?? What about assymmetry?? It's lethal. and never  brought up with U/ls  The thing with the P92 is the high drag with lowering flap and how quickly the speed can drop off if you don't watch it and lower the nose or put on a bit of power. 

   ALSO you trim after you get the required pitch and speed to RELIEVE control forces. You don't fly on trim.

   If you're a bit fast the force required to lower the flap should alert you to the Fact. (Feel). You can also dump flap on the ground more quickly if that helps braking. Weight on wheels.  Nev

Right you are. I might have been thinking of a flat spin for power. Bear in mind I've never done one. I've thought about going up in a glider to do some spin training. Tonight I'll watch some training videos on spins to get my head right. 

About what I said about trim. I was probably being a bit perfunctory there about the procedure with the golf. I'm translating my muscle memory into words! First thing is close the throttle to idle, and the nose will drop. As you do this hold the trim up button. It takes a number of seconds so you should do it pretty much straight after shutting the throttle. Personally the main reason I don't like electric trim is this adjusting via 'timing' rather than by position. Especially planes like mine or the Savage Cub, you just push the trim lever instantly to the approximate position, then of course fine tune it by feel. 

And now you mention it, yes two flap motors would not be a good idea. Which still leads some of us to ask- why electric? My theory is it's easier to bolt an electric motor where you need and run electrical cables however you like, than to maybe have to design around some awkward geometry for control cables etc. 

Mind you, again looking at my plane, the trim is push/pull via Bowden cables so geometry isn't critical.