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  • July 03, 2025, 07:42:49 AM

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81
Open Forum / Re: Weather
« Last post by Dave_Trible on July 01, 2025, 08:40:47 AM »
Quote from: Steve Dwyer on July 01, 2025, 08:08:58 AM
Weather changes here in the northeast has appreciably affected our lives especially available flying days. The proximity of the great lakes has always been the culprit for unsettling weather, but I recall the summer as a kid we had endless warm sunny days with an occasional thunderstorm followed by the usual rainbow. Now days more frequent precipitation almost every day and high wind and overcast seem to be the new norm along with a mix of record-breaking temperatures exceeding anything previous. Of course, there is much posted regarding the effect of these climate changes we have no control over; the unfortunate part is we have an ever-shrinking window to do what we enjoy most.

Steve
Also true here in the center of the country.   I remember many days in April and May that we had really nice flying weather.   Now it's quite windy and sometimes days on end of rain up until just about right now in late June or early July that it settles into maybe 60-70% decent flyable days.  For us its more like a season shift since we can still keep flying past Thanksgiving many times-even flown on Christmas Eve a couple times recently.   In the earlier days we were done in October.    One really different thing is what I call 'wind events'   The wind will blow gales non-stop for four or five days straight, then die out.    This is something I've only recalled seeing in the last five years or so here.   There was a new twist this year.   The same time frame of four or five days with dead air-treacherously dead or variable wind.  Fly at your own substantial risk.  I know a lot of this is about the jet stream.   It hovers just about overhead here but of course sways north and south and that has a huge bearing on what we will see.

Dave
82
Open Forum / Weather
« Last post by Steve Dwyer on July 01, 2025, 08:08:58 AM »
Weather changes here in the northeast has appreciably affected our lives especially available flying days. The proximity of the great lakes has always been the culprit for unsettling weather, but I recall the summer as a kid we had endless warm sunny days with an occasional thunderstorm followed by the usual rainbow. Now days more frequent precipitation almost every day and high wind and overcast seem to be the new norm along with a mix of record-breaking temperatures exceeding anything previous. Of course, there is much posted regarding the effect of these climate changes we have no control over; the unfortunate part is we have an ever-shrinking window to do what we enjoy most.

Steve
83
Open Forum / Re: Similar Terminology
« Last post by John Park on July 01, 2025, 07:53:52 AM »
Quote from: Ken Culbertson on June 29, 2025, 08:35:22 AM
Why would they call it a "dead stick" when the stick becomes easier to move and it is not the stick that is dead?  Unless of course you lost hydraulics, but then you would probably have a "bad yoke".  H^^

Ken
Absolutely - I can't make any sense of it either!
84
Building techniques / Re: Control throw measurement.
« Last post by Ken Culbertson on July 01, 2025, 07:16:14 AM »
I may have to go to the dog house after this but I am bothered that we appear to be applying a symmetrical solution to an asymmetrical problem again.  What we are after is a plane that turns at the same rate inside and out.  Even an inline will have some preference in how it turns inside vs outside from nothing more than it's design.  Even planes of the same design differ.  The most effective trim is the angle of the bellcrank to the fuselage centerline.  It is the only change inside the plane that will result in uneven movement of the control surfaces from even inputs from the handle.  It is also the one element of the controls that we have to preset using our current designs.  The last three planes I have built have Mark Wood's flap control box which allows you to easily change the flap pushrod length.  On the last one, the inline twin, I discovered quite by accident how effective that change was in evening turn rates.  In my opinion if you really want equal handle movement to produce equal turn rates you have to consider the plane's natural tendencies and bellcrank/fuselage angle.

Ken
85
3D Printing and Vinyl Cutting / I made a Gasket.
« Last post by kevin king on July 01, 2025, 04:53:35 AM »
I made a paper backplate gasket yesterday on my vinyl cutter. It worked well😊
86
Open Forum / Re: PA65 NEW AAC piston/liner/rod/pin sets.
« Last post by Brian Gardner on July 01, 2025, 01:24:55 AM »
I've not taken it as discouragement at all Brett.

Quote from: Brett Buck on June 30, 2025, 11:15:43 PM
          And just to be clear, I think what you are offering is excellent, and I am sure if you did make them. everyone would get a top-quality result. So I am not at all trying to discourage you from trying.

      Brett
87
Building techniques / Re: Control throw measurement.
« Last post by Howard Rush on July 01, 2025, 12:02:32 AM »
Quote from: Brett Buck on June 30, 2025, 02:25:21 PM
You want to measure at a variety of up or down leadout movements and make sure the rate of movement is the same both ways, the rate of flap to elevator movement is the same both ways, and the flap to elevator ratio is what you expected

That’s one way to go about it.
88
Open Forum / Re: PA65 NEW AAC piston/liner/rod/pin sets.
« Last post by Brett Buck on June 30, 2025, 11:15:43 PM »
Quote from: Brian Gardner on June 30, 2025, 10:44:33 PM
Yes, I agree with all your points Brett,

It is all very subjective as to which size to choose to do.

I was specifically asked to do the 65 initially because some perceive this to be the best running version - whilst others would prefer the 75 because it was the latest and greatest of the lineage. I'm happy to do any of the displacements if the volume is there for cost effective production runs.

Some have requested I do it "while I'm still around" so they can buy spares for the future - rather than wait until they need them and I may no longer be around.

So if people for example want the 61 done because there are more out there in circulation/older/and getting closer to replacements I'm happy to oblige. It's all customer driven.

          And just to be clear, I think what you are offering is excellent, and I am sure if you did make them. everyone would get a top-quality result. So I am not at all trying to discourage you from trying.

      Brett
89
Engine set up tips / Re: Half of muffler comes off B 40
« Last post by Dan McEntee on June 30, 2025, 10:51:07 PM »
  Just a dab of loctite and a second jam nut should secure things well enough. Fly a few flights and check it to be sure.
  Type at you later,
   Dan McEntee
90
Open Forum / Re: PA65 NEW AAC piston/liner/rod/pin sets.
« Last post by Brian Gardner on June 30, 2025, 10:44:33 PM »
Yes, I agree with all your points Brett,

It is all very subjective as to which size to choose to do.

I was specifically asked to do the 65 initially because some perceive this to be the best running version - whilst others would prefer the 75 because it was the latest and greatest of the lineage. I'm happy to do any of the displacements if the volume is there for cost effective production runs.

Some have requested I do it "while I'm still around" so they can buy spares for the future - rather than wait until they need them and I may no longer be around.

So if people for example want the 61 done because there are more out there in circulation/older/and getting closer to replacements I'm happy to oblige. It's all customer driven.

Brian
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