jeffcb52

Hi all,I found that my Altimeter has been tampered with. It now reads around 3500 ft at my airfield (125 ft)

Seems that someone possibly a child has wound the knob passed the stop. Not at this airfield.

 

I guess that the only way to calibrate again is to take the readings from another plane and set the alt with the QNH

 

Is this my best method? as very costly to send away and they may not inspect due to not being an approved brand.

 

I did set the taf QNH and airport height the other day but yeaterday it was about 70 ft out using QNH again.

 

Regards,

 

Phil.

I was referring to the ssensor for a carby ice detector, not a temperature measuring device. The probe has an LED which shines onto a sensor. Ice forms on the probe before the carby butterfly and gives a warning. Seems to work well.

regards

Jeff

Dear Garry,

Without going to the hangar and having a look, I think I have a fibreglass elbow between the carby and the scat hose carrying air to the carby. We welded a nut with the correct thread onto a small plate and fibreglassed it onto the side of the fibreglass elbow thingy. Sensor screws into nut. Has been there for 5 years and works well.

Regards

Jeff

Danny,

It's possible the difference is due to your engine having hydraulic lifters. I would happily wear the expense if it worked.

Good to meet you last Sunday.

Regards

Jeff

I just replaced the Shell W100 plus I have been using in my J200 3300 (solid lifters, coarse heads) with Exxon Elite 20W-50, and my judgement is that oil temp is unchanged.

It's expensive too.

Jeff

As I replied previously, send me your email address and I'll email a couple to you. Can't seem to make them upload here

Jeff

I have a lot of trouble with oil leaking from under the mechanical fuel pump gaskets/spacer.

I am diligent about tightening, use loctite etc.

The problem seems to be that over time the plastic spacer deforms and allows everything to come loose. Repeated tightening to stop the oil seeps eventually cracks the spacer across the bolt hole, causing a much more serious oil leak.

Anyone else had the problem?

I am wondering whether an aluminium spacer would solve the problem, or would that cause some other problem.

Regards

Jeff

Repair with a layer or two of kevlar is easy and good.

Jeff

Ian,

I cut some squares or circles of fibreglass a few millimetres thick and glued them on the inside of each existing hole with epoxy and floc. Clamp overnight with a spring clamp and redrill hole the next day to the appropriate size for the self tappers. The extra meat for the screw to bite into has worked well. They stay tight and are amazingly cheap.

Regards

Jeff

I have over 400 hours in a Jabiru powered Lightwing and agree totally with NigelB. You run out of rudder authority at some stage before the tail is down. Only a problem in cross winds. I learnt to land wheeler style in a Thruster with Tony Hayes, so I am familiar with wheelers and find them very easy in the Lightwing if there is not too much crosswind. However I usually do three pointers.

Regards

Jeff

Ian,

I bought a new spring form Jabiru and it is considerably stronger than the original.

Regards

Jeff

I don't think a gentle bending of the cable increases the friction too much. It comes from the rubber boots at each end of the cable (removing them helps), but mainly from the internal resistance of those servos which do not have an electromagnetic clutch to disengage when a/p is not in use. The bigger the servo the greater the residual torque. Bigger servos are heavier and longer and take more room to mount-not a problem if mounted in the rear of plane.

One of the great benefits of a digital a/p such as a TruTrak is having its own attitude sensors. It is a whole separate attitude system independent of any other attitude instrument, and is therefore another level of redundancy.

If you attach an a/p to an existing efis, then one failure leaves you completely vulnerable. You might save $1-2,00, but it is a compromise.

Jeff

AP servo photos

photo of servos

I have sent J430 a few photos. Hopefully he can post them on the site. I don't know how to do it .

Regards

Jeff

Dear J430

I have a trutrak a/p in my J200. Started off with small servos but had to upgrade to size C on ailerons and HT (I think) gearbox servo (with electromagnetic clutch) on the elevator. The latter is $1000 more expensive, from memory, but has the advantage of no residual friction when disconnected. The normal C servo on my ailerons has noticeable residual drag, which takes even more feel out of the controls.

However it is a brilliant device.

Jeff

Have a look at www.gpsoz.com.au. They have what you are looking for. I have one on a Garmin 196. Works fine but does not seem to be any better than the Avmap aerial mounted inside the windscreen, or for that matter it does not seem noticeably superior to the built in aerial in a Garmin GPS 12 I previously used. Aircraft is a Jabiru.

Regards

Jeff

Clemair,

Sorry I haven't looked at this page for ages. I use a Garmin 196 to provide the gps info to the JPI 450. I think any gps nmea info would work. The tricky bit is in setup. Don't select any of the gps's offered. Just select the option which you think is not going to give gps info (from memory it might be 0). Lo and behold your gps info goes into the JPI to give you fuel required to the next waypoint etc. Must admit I don't use this info as much as I thought I would. However having both fuel flow and one of the other functions available simultaneously is good.

I always still check my fuel "gauges" in the wing roots every half hour (have reminders set into gps setup) to make sure it all looks about right , in case there is a leak or a cap comes off.

Also have a float switch in the header tank connect to a red light and a loud buzzer which goes off when 2 L has gone out of header tank.

Hope this helps.

Jeff

Clemair,

I have use a fuel mizer in my J200 and it was good. Accurate once calibrated.

I replaced it with a JPI 450 which has the advantage of connecting to the gps, as well as showing fuel flow at the same time as the other normal totals shown by mizer.

The first JPI went mad and was replaced under warranty. New one works well. Once again it all about calibration, and working from the total which is reset at each filling of the tanks.

Regards

Jeff

In case anyone is interested I have purchased the metal backing plate from Ian (it's on the Avmap website) and it is a neat and secure fit onto the back of the Avmap. It still locks with double click velcro, but because the plate is rigid it is a good fit. Plate has 6 threaded holes to allow mounting onto something else. Way better than trying to secure the plastic leg mount to a bracket. Cheap too @$20-30.

Regards

Jeff

I am also trying to attach a headset to an Icom A20 in order to have it as a back up.

Activating the PTT switch on the plug setup I made will generate a reply from the aerodrome response unit (or whatever it is called), but speech is not transmitted and is accompanied by a squeal. I have been told it is only transmitting a carrier wave.

I have tried installing a capacitor and resistor as per some diagrams off the net, but to no avail. I purchased a PTT setup for an Icom A20 from Aircraft Spruce, but it has no plug for the headset mic lead. Very useful.

I would be delighted if someone could draw a laymans diagram on how to remove the squeal and allow speech through the heaset mic. I can solder and do have a selection of capacitors and resistors.

Regards

Jeff

Geoffreywh,

This is good news. Could you email those files to me so I can try again.

email is [email protected]

regards

Jeff

Geoffreywh,

I think those files must each be linked to a specific compact flash card number.

I imagine you have to supply Avmap with the number off your compact flash card in order to be sent a file which will work in your gps. Otherwise we could all have free updates. I wonder if the new updated cartography which has been mentioned is now available? Let us know how you get on.

regards

Jeff

Chris,

I do have an Avmap 1V mounted in a Jabiru J200 with a normal dash. I made a bracket and mounted it between the door and the dash panel. It overlaps the dash panel a bit but is a great position to read it. Glare is a problem but have made an aweful looking plastic shroud held on with velcro to shade it. Works OK. It is mounted in vertical orientation, which is better for track up mode anyway. One thing to be aware of is that the Avmap does not seem to have a means of fastening to anything except with the dual click velcro strips on its back. This is only just good enough, and can be dislodged reasonably easily when it is mounted in vertical orientation. I have a couple of strong elastic straps to help, which of course adds to the overall chic of the entire installation.

Regards

Jeff

Bushpilot,

My AVmap is an EKP 1V. Not the pro model.

Regards

Jeff

John,

Thanks for the files. They don't work on my gps and having seen your original email plus what Rebecca of EDMO sent me it is clear they are linked to the number of a specific compact flash card.

I am going to hold off sending in the free update voucher, as apparently upgraded terrestrial cartography is to be included in a couple of months.

Regards

Jeff