MikeOH

OMG Say it isn't so!!

IMHO

I have a '70 F and installed the Tailbeacon in December 2019. 0.15AMU was insignificant to avoid the asymmetry that the wing tip install would have provided My A&P and I installed in an hour and I kept my old KT76 transponder. I did have to adjust the threshold to get good PARs. Other than that minor adjustment I've been very happy! Total cost with tax and install was under $2300. While I'm still bitter that I was forced by government edict to install an always on tracking device (I don't buy the 'anonymous' mode...if the Feds want to track you, they are going to), I'm pretty glad I waited to the last minute...it's staggering how much some early adopters paid

Other random thoughts... Did this problem just start, or is this a new install problem? (Sorry, if that's been covered) Does this happen everywhere? As in, at other airports, in the air, or just at your home airport? The fact that the #1 comm doesn't have the issue suggests (but does NOT prove) that the problem is either poor shielding (as Greg Baker suggests), or that it is internal to the unit itself.

At this point, I would pull the GNC300XL out of the panel and run it on the bench with an external power supply with only a speaker hooked up; no antenna or anything else but the speaker. That would prove if the GNC is the source, or if it is external interference.

Yes, that's where my G3 temp probe is located. The oil pressure sender was in the left front oil gallery; now it has a plug!

Was the PWM controller a TSO product? I'd be concerned about EMI interference with GPS nav/coms.

No, not really. I suspect it's always been going on and it hasn't become any worse. I was more concerned with low pressure (right around 60 psi), but that was addressed in February at my last annual; my A&P found that the G3 was picking up oil pressure at the FRONT of the engine rather than where the factory gauge picks up. He created a tee at the factory location and relocated the G3's sensor. Upped by 10 psi.

Bingo! What do those four small machine screws that hold the tie-down anchor mate with? Threaded holes in the aluminum spar? steel inserts in the aluminum spar? Or, a large, well engineered steel plate affixed to the spar? Strength of the tie-down anchor material may be a very distant second, or third place, in what gives first.

One more data point: My F has averaged about $15K annually for the three years I've owned. That's all in; hangar ($360/mo in southern California), annuals, maint., fuel/oil, databases, cleaning supplies, training (IPC & FRs)...I know it's a sin, but I have spreadsheet with EVERYTHING recorded. I know better than to post publically, but PM if you dare to take a look

I bought my F with a run-out engine....priced accordingly but figured I'd have to do an overhaul at any time, but it would be the way I wanted it done. Three years and coming up on three hundred hours later and compressions are all mid-70s, no leaks, runs great. I'm in no rush. I wouldn't spend any money on the engine; just price it right.

LOL! Exactly how I was going to approach this...but my wife wanted to go to dinner 2 hours ago...and we just got back

Oil .... vinegar. Army .... intelligence. Passive .... aggressive. Walking ..... dead Sweet ..... sorrow. Justifying the cost of .... airplanes

And, absent some valid statistical data on exactly how many epidemiologists agree, and to what degree (and, not just hand-picked politically correct ones), I'll posit that the exact shade of gray is not so easy to know with certainty.

Hmm, lacking actual supporting data makes "seems like a reasonable proxy" not a whole lot different from "educated guess." Almost up there with "follow the science."

Not trying to evade; I PAID my tax to Kalifornia. I see no need to 'prove my innocence' to other states that seem to think they are entitled to more pounds of my flesh

@GEE-BEE I have been very happy with your baffle kit I bought three years ago. Part of what you sent was a set of blue silicone rocker-box gaskets...which I've not yet needed to install! Would they be with the fiberglass? (Not sure you've changed materials since then)

As a pragmatic, practicing, engineer...NOT a theoretical physicist, I'm going to worry about this when I believe that the weight shown on the W&B for my 50 year old airplane is accurate to 10 lbs

I really want to laugh, .... but, as a Kalifornia resident I know only too well how true your statement is

Hmm, I've never had a problem with rocker box leaks in over three years of ownership, but I now think I know why others do....35 in-lbs is just under 3 ft-lbs, which is NOT much! I strongly suspect most are waaay overtightened and the cover/gasket distorts and a leak ensues. Followed by MORE tightening to 'stop' the leak.

Gee, I feel so much better <major sarcasm for the sleepy reader>

@A64Pilot Try going to settings, general, keyboard, and turn off smart punctuation. No guarantee given what you're paying me

Thanks for the honest post!

Perhaps. I had thought that flush rivets maintain laminar flow farther back on the wing. So, I suppose a rough surface could destroy laminar flow prematurely causing increased drag. Wax away!