-
Posts
658 -
Joined
-
Last visited
-
Days Won
1
Content Type
Profiles
Forums
Gallery
Downloads
Blogs
Events
Store
Aircraft
Resources
Tutorials
Articles
Classifieds
Movies
Books
Community Map
Quizzes
Posts posted by Keenaviator
-
-
I worked on ensuring a good pressure differential between the top and bottom of the motor. I shifted the oil cooler off the sump and fitted a larger Serck cooler with AN6 fittings (fitted larger fittings to the oil cooler adapter to improve flow) at the rear of the engine on the airframe instead of the engine so it is not subjected to as much vibration. This oil cooler has a naca duct with a 2" scat hose leading to it (air flow controlled by a butterfly valve that can be adjusted by the pilot). Next I reduced the size of the old oil cooler air inlet beneath the spinner (bottom of cylinders) by about 80% and fitted a close fitting duct to the sump to direct some air through the cooling fins cast into it. - this meets neatly with the air inlet below the spinner. I closed up the holes in the Jabiru cylinder cooling ducts (couldn't see much point in giving air another option other than through the cooling fins) that allow a small amount of air to bleed into the area between the top cowl and inner of part of the cylinders and crank case. I'm very happy with the results. Flying today in cool conditions around 15C at 2500' CHT was around 90C and oil temp 80C with the air shut off from the oil cooler. I opened the air valve and a short time later I saw the oil temp coming down further; closed it and it settled at 80C. Laurie.
- 1
-
Very pleased with the way this machine has turned out. It flies straight and engine temps and pressures excellent - the under cowl mods work a treat. It's running a bit rich (exhaust pretty dark and a slight miss at WOT above 2500' that gets worse with carby heat as expected - will investigate jetting/needle position). It glides very nicely too with those long wings. Sink rate at MTOW about 400 fpm (engine off with CFI for company). Cheers, Laurie
-
I'm sure you can Nev but the skid ball would be useless. Trikes are a bit weird in that you don't fly by attitude since you are dangling around below the wing as opposed to being part of it in 3 axis. Laurie
-
Not in a trike. LaurieYou could have a stop watch and rate turn needle (with slip indicator). Good old fashioned instrument to fly by. Nev -
[medio=full]448[/medio]
- 6
-
Do Jabiru cylinders break? LaurieDafydd said " you cannot bore out a Nikasil barrel to the next oversize, as you can with a plain steel barrel" .................... Mainly True................. But this statement is dodgy on two counts....one being that nobody bores out Nikasil barrels anyway, and why should they? It's simple enough to de-electroplate the barrel, repair any damage in the alloy and replate. I have had it done. The second is "as you can with a plain steel barrel" Good luck with boring a Jabiru barrel 20thou oversize. If they break at full size, they may break quicker with a thinner wall?.....By all means try to replace the steel barrel with an alternative, please..... -
All that was done is getting a non amphibious float plane back into the air after maintenance. They were not doing it as a stunt or thrills. Laurie
-
Just ignorance. Laurie
-
Welcome and also be careful if there are any fruit bat culls being carried out! Laurie
-
I noticed while building my Jabiru UL450 that the wings were absolutely straight - no washout. The rigging of the flaps appears to be how Jabiru get the centre section of the wing to stall before the tips. The flaps are rigged a couple of degrees down while the ailerons are set at zero degrees. They are also quite specific in the rigging of the elevator, 18 degrees up and 6 down (limiting power to achieve very high angles of attack?). Do you have any experience with these Dafydd? Laurie
-
Collective! My Cessna 150A tail dragger had this and it was very handy. LaurieA bit of thread drift, but I liked flying the Piper Archer and Savage Cub because they both have manual flaps. Both use a lever like a hand break (for those who don't know), heaps better than electric IMO. It makes it easier and a lot quicker to remove the flap on the ground to get weight on wheels. -
Good stuff Mark! Half your luck. Laurie
-
So you go wee wee wee wee all the way home?
-
I've heard of the inside of the fuel line being shaved when installing onto a spigot on one of the many fittings. Sounds like you fuel flow is being restricted somewhere. Also ensure there are no kinks in the lines. Laurie
-
Mine was a first start after 14 years. Second blade after mags turned on and yes, well inhibited. Laurie.
-
Yep, well done Bob. I reckon I have some idea of how you are feeling at the moment too as I'm waiting for my registration to come from RAAus.....Fantastic Bob! Well done. When is the first flight?Cheers, Laurie
P.S. I've just started some leave so real keen now to get the little rectangular bit of plastic (reg card) and get on with it. 25 hours within a 40nm radius of YLTV.
-
My understanding is that intersecting angles less than 90 degrees should have a fillet to reduce drag whereas intersecting angles greater than 90 degrees don't need it. Laurie
-
The reg number preceded by the letter N could be a clue as to where it is. That and the accent. Laurie ;)
- 1
-
I've put a cold start kit on my NOS 2200A because it has the early lower power black starter motor which used to really struggle in cool weather. It certainly works.
- 2
- 1
-
Are you sure? Who says you have to speed? Give me as many speed checks as you like. There are too many variables with a ramp check including the experience of the enforcers.Rather a sweeping statement and a bit of an insult! I'm not sure if CASA is there with a budget to fill.I can understand the angst if you are rushing to the loo after a long flight.I am driving so I will be at the mercy of NSW's finest for about 10 hours. A ramp check as opposed to a speed check would be a pleasure.
- 1
-
We're a soft target. LaurieGeoffreywh - In answer to your question I'm not afraid of them, it's just the fact that they feel they need to be there. It seems to me they've been far too heavy handed where RAA is concerned. Slowly but surely they are imposing themselves more and more on us as GA numbers dwindle. Got to have someone to bully. -
Can someone who is running a Camit engine give some feedback as to how they are going? Laurie
- 3
-
I did it in May 2006. It was done clockwise and had a great run of weather. Laurie
-
I reckon one or more of these would be handy. Not too dear either. Laurie
Video: First Solo Flight Jabiru UL 450
in Aviation Videos
Posted