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Search: Posts Made By: BillL
Forum: Safety Today, 05:11 PM
Replies: 58
Views: 4,635
Posted By BillL
Don't know about an aluminum design Rock, and I...

Don't know about an aluminum design Rock, and I don't know that a carbon part could even be made that would be 1. equal aerodynamically, 2. lower in mass, 3. stiffer in every mode, and 4. lighter in...
Forum: Traditional Aircraft Engines Today, 01:06 PM
Replies: 30
Views: 1,660
Posted By BillL
David, good the hear of the success - yea you...

David, good the hear of the success - yea you have to lift and go back and forth. I experimented 40 yrs ago and that works best.

High confidence that you will get good readings after a flight hour...
Forum: Safety Today, 10:00 AM
Replies: 58
Views: 4,635
Posted By BillL
The 7 Short (aka 8) rudder is smaller, lighter,...

The 7 Short (aka 8) rudder is smaller, lighter, and CG closer to the pivot than the 7Tall/9 rudder.


29671
Area and weights not including fiberglass. Area is from spar rivet line aft.

Thanks...
Forum: Safety Today, 06:23 AM
Replies: 58
Views: 4,635
Posted By BillL
Education Please

Could you help the flutter-ignorant engineers with some understanding please. I thought that decreasing mass, moment, and increasing stiffness of a flight control would always extend the flutter...
Forum: Safety Yesterday, 07:11 PM
Replies: 58
Views: 4,635
Posted By BillL
I bet some would if it was lighter (like the 8),...

I bet some would if it was lighter (like the 8), carbon fiber, stronger/stiffer in torsion and bending. Then counterweight factor could be better. Reno/racers might want it.

Can this be done in...
Forum: Safety Yesterday, 05:05 PM
Replies: 58
Views: 4,635
Posted By BillL
Clarification

The original 7 release came with the same-as-the-8 rudder also the same as counterweighted 6 rudder with .020 skin. Let's call it the 7Short. The vertical on the 7 does not change with the rudder. I...
Forum: Traditional Aircraft Engines Yesterday, 04:26 PM
Replies: 44
Sticky: ENGINE COOLING
Views: 38,023
Posted By BillL
Bad Bill . . . . :o

Excellent, I fixated on the differential and missed the big red label "upper vs static" :o

Looks pretty stable over the speed range.
Forum: Traditional Aircraft Engines Yesterday, 04:01 PM
Replies: 44
Sticky: ENGINE COOLING
Views: 38,023
Posted By BillL
Sorry a little confused.

I am missing something, Pete. The chart says pressure differential - is that upper to lower or upper to static?

Maybe a terminology thing. I would call upper pressure referencing static port...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) Yesterday, 06:40 AM
Replies: 10
Views: 778
Posted By BillL
Result of policy without understanding. It is...

Result of policy without understanding. It is hard (impossible) to remove intelligence from everything we do.
Forum: RV Building Tips/Techniques 08-16-2022, 02:50 PM
Replies: 7
Views: 458
Posted By BillL
Posted before

https://vansairforce.net/community/showthread.php?t=23674
Forum: Traditional Aircraft Engines 08-16-2022, 05:44 AM
Replies: 44
Sticky: ENGINE COOLING
Views: 38,023
Posted By BillL
Great start with data!

Pete, please do plot the upper plenum pressure vs airspeed to assess the recovery. Just shooting from the hip(looking at your data), and your comment about leakage, it seems that the by pass leakage...
Forum: RV Ongoing Maintenance Issues 08-15-2022, 04:17 PM
Replies: 12
Views: 372
Posted By BillL
It sounds like you concluded that you have a...

It sounds like you concluded that you have a static leak. I would agree. My 1/16 NPT fittings leaked on the back of the various instruments. And in all isolating and checking, i failed to solidly...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 08-15-2022, 12:34 PM
Replies: 4
Views: 987
Posted By BillL
Hmmm, same here. No access.

Hmmm, same here. No access.
Forum: RV General Discussion/News 08-15-2022, 12:26 PM
Replies: 22
Views: 1,554
Posted By BillL
I have been using 130-140 kts, and (yes) use wing...

I have been using 130-140 kts, and (yes) use wing tip & ground references.

But I'm certainly no expert and could be all wrong.
Forum: Traditional Aircraft Engines 08-15-2022, 07:37 AM
Replies: 6
Views: 316
Posted By BillL
It appears you have had some cylinder rust...

It appears you have had some cylinder rust events. At least one.

One exhaust valve appears to have hot range about 150 deg of the perimeter - a look at that specific area is warranted.

I can not...
Forum: Electrical Systems 08-14-2022, 09:56 AM
Replies: 8
Views: 406
Posted By BillL
Agree with your sound thinking. I have shunt in...

Agree with your sound thinking.

I have shunt in the battery-to-system there for two reasons: 1. The amp shunt will tell me what all the system demands are. 2. When an alternator fails, then I can...
Forum: Traditional Aircraft Engines 08-14-2022, 07:57 AM
Replies: 30
Views: 1,660
Posted By BillL
Don't be sloppy.

It is surgical procedure . . as stated - use compound sparingly, do not drop in the cylinder and clean^3. Too much and as the valve seats and rotates it will make pearls of compound. You can feel the...
Forum: RV Building Tips/Techniques 08-14-2022, 07:46 AM
Replies: 17
Views: 3,880
Posted By BillL
Can not compete for best way, but someone...

Can not compete for best way, but someone recommended super glue to stick the washer stacks together. It works great but only useful after you know the correct spacing.

Also, they make a fancy...
Forum: RV General Discussion/News 08-13-2022, 10:05 AM
Replies: 14
Views: 1,332
Posted By BillL
If it was me . . .

If you had the rocker off, or ensured there was lash and tapped the valve and still leaked and triple checked to ensure it is this valve leaking.

Then "if it was me" I would - remove the rockers,...
Forum: Electrical Systems 08-12-2022, 08:52 PM
Replies: 11
Views: 1,410
Posted By BillL
Alex, it could be the terminals. Fretting has...

Alex, it could be the terminals. Fretting has been known to increase resistance causing this very condition, higher than normal voltage....
Forum: RV-14 08-12-2022, 08:26 AM
Replies: 10
Views: 1,175
Posted By BillL
What does Vans use for the prototypes?

What does Vans use for the prototypes?
Forum: RV-7/7A 08-12-2022, 08:21 AM
Replies: 4
Views: 251
Posted By BillL
Try this before going to the heat gun. Not sure...

Try this before going to the heat gun. Not sure if it works, but if the surface is not continuous anymore - - - maybe.


Take two full sheets of paper towel, lay on and area and wet with mineral...
Forum: Fiberglass 08-12-2022, 06:15 AM
Replies: 26
Views: 1,323
Posted By BillL
Design consideration

Beware that if you make a beautiful wrap around the leading edge that the back leg that drops down around the torque tube has to have enough gap to push the fairing forward for removal. I did this...
Forum: Fiberglass 08-11-2022, 02:34 PM
Replies: 11
Views: 758
Posted By BillL
Lots of good epoxy resins - - different...

Lots of good epoxy resins - - different properties though. I use West unless I need something it does not do (properties). I have used some of the following. Not nearly all they offer!!

Resin...
Forum: Traditional Aircraft Engines 08-11-2022, 07:12 AM
Replies: 38
Views: 1,851
Posted By BillL
READ THE BOOK!!

I just had this situation. It is likely too rich - NOOO THAT IS CRAZY, RIGHT!!

No - here is what happens - if it is waaay too rich, then pulling back (mix) can reach cutoff before it leans enough...
Forum: Tools 08-10-2022, 03:03 PM
Replies: 48
Views: 3,225
Posted By BillL
My wheels are good, but no lifting is not working...

My wheels are good, but no lifting is not working for this old guy.

If it were automotive, the original DogBone (http://www.bonecreeper.com) is one of the best, it will roll without resistance over...
Forum: Safety 08-10-2022, 12:49 PM
Replies: 6
Views: 759
Posted By BillL
Thumbs up I'm a believer . . .

;) .

https://vansairforce.net/community/showpost.php?p=1311833&postcount=23
Forum: Fiberglass 08-09-2022, 04:24 PM
Replies: 26
Views: 1,323
Posted By BillL
Paul, that part is made with the mold on the...

Paul, that part is made with the mold on the outer surface, but it is the inner surface that controls the fit. Mine fit badly too (circa 2003 part) and before making mods, I sanded all the inner...
Forum: Traditional Aircraft Engines 08-09-2022, 02:22 PM
Replies: 120
Views: 15,627
Posted By BillL
Thanks for more info & request

Paul, since you will be getting all the bases covered for an article, can you include any tests that have been run for collapse of the element at high capacities. I have seen posted a collapsed...
Forum: Traditional Aircraft Engines 08-09-2022, 07:19 AM
Replies: 120
Views: 15,627
Posted By BillL
Thanks, Dan, I did not see that in the Tempest...

Thanks, Dan, I did not see that in the Tempest docs.

That opening pressure is what I figured it might be, maybe less since Tempest claims their filters meet the Continental spec implying it is...
Forum: RV-4 08-08-2022, 08:53 PM
Replies: 14
Views: 2,179
Posted By BillL
Suggest you get a design recommendation from...

Suggest you get a design recommendation from Vans. It is just a super stiff structure right up to the point that part of the rail is cut and left with an opportunity for unexpected loading. Clearly...
Forum: Traditional Aircraft Engines 08-08-2022, 06:52 PM
Replies: 14
Views: 662
Posted By BillL
I don't see that the OP has stated what starting...

I don't see that the OP has stated what starting battery chemistry is installed. A LiFePO battery will draw quite high amps after a start and could result in high alternator torque.

BTW - belts are...
Forum: Traditional Aircraft Engines 08-07-2022, 08:51 AM
Replies: 120
Views: 15,627
Posted By BillL
The internal pressure bypass for the 108 has been...

The internal pressure bypass for the 108 has been said by Tempest to be 12-14 psi. Do we know the bypass pressure at which the Lycoming base opens (110)?

The reason asked is to get confirmation...
Forum: Safety 08-06-2022, 03:42 PM
Replies: 34
Views: 2,631
Posted By BillL
We can not forget the rudder stops too. They...

We can not forget the rudder stops too. They revert to the original design. Ugh - more paint.
Forum: Safety 08-06-2022, 03:22 PM
Replies: 34
Views: 2,631
Posted By BillL
Same situation, hanging in the basement. If you...

Same situation, hanging in the basement. If you do I will. :D
Forum: Trip Write-ups 08-06-2022, 10:38 AM
Replies: 8
Views: 1,350
Posted By BillL
Nothing special? HA!

Well said Smokey. . . . I believe that is the differentiator that will make the RV15 a huge success.
Forum: RV General Discussion/News 08-06-2022, 10:11 AM
Replies: 53
Views: 8,144
Posted By BillL
There may be more facts to accompany this photo. . .

before we draw conclusions. IIRC, A while back (as posted on VAF w/video) an airshow pilot in a row of 8's with full flaps (simultaneously) did a start, run-up and smoke on the line. With full...
Forum: Safety 08-06-2022, 09:58 AM
Replies: 34
Views: 2,631
Posted By BillL
The 7 tall/9 rudder is 936 in^2 without the glass...

The 7 tall/9 rudder is 936 in^2 without the glass ends. The center of the area is 12" from the pivot line. .016" skin.

The 7-short aka 8 rudder is 718 in^2 w/o glass ends. .020" skin
Forum: Places To Fly...Things to See...Things to Eat 08-05-2022, 04:37 PM
Replies: 21
Views: 1,322
Posted By BillL
Personally

I learned to fly out of Brookley field (formerly AFB), sure would like to see/tour Airbus if that is available.
Forum: Safety 08-05-2022, 08:29 AM
Replies: 34
Views: 2,631
Posted By BillL
Steve made a nice silent video and he installed...

Steve made a nice silent video and he installed the elevator lock in 30 seconds. One side was rope only, the other contained a bungee with a short rope loop, just enough for installation.
Forum: Safety 08-05-2022, 07:29 AM
Replies: 34
Views: 2,631
Posted By BillL
Digging a little deeper.

What would be the tension on a rudder cable with a 90 ft-lb torque? 360#? The Gustbuster guy calculated 90lb for the tall 7/9 rudder is that in the ball park?

What torque on the rudder horn is...
Forum: RV General Discussion/News 08-04-2022, 03:23 PM
Replies: 53
Views: 8,144
Posted By BillL
Really sorry to hear that Jim. I was sent to 27...

Really sorry to hear that Jim. I was sent to 27 too (Tuesday) and exited on the left. But really wondered what lay in wait in that grass. I'll bet the mowers know where the "stuff" is located.

On...
Forum: Safety 08-04-2022, 02:45 PM
Replies: 91
Views: 10,743
Posted By BillL
Sounds like field validation.

Short of a lazy susan on top of a truck (60 mph) rotating with a rudder held by this gust lock, that is a good endorsement!
Forum: Safety 08-04-2022, 07:20 AM
Replies: 91
Views: 10,743
Posted By BillL
Does this happen every year or just even years?

Steve Melton (now anonymous) offers a printed set of gust locks that holds the TE and anchors to the elevator locks with ropes employing a short shock cord.

Did anyone have one of these (or...
Forum: Midwest 08-04-2022, 07:01 AM
Replies: 3
Views: 404
Posted By BillL
You might call Nick Scholte, he is an approved...

You might call Nick Scholte, he is an approved Vans transition instructor and IAC Aerobatics instructor too. Located at Morris,IL (C09) not too far from you. He is available in evenings, but pretty...
Forum: RV General Discussion/News 08-03-2022, 03:00 PM
Replies: 15
Views: 1,567
Posted By BillL
Talking Indeed!:D:

Indeed!:D:
Forum: RV General Discussion/News 08-02-2022, 08:57 PM
Replies: 8
Views: 1,491
Posted By BillL
I thought I missed something . . . .

I got pass through w/o rocking this year and I was totally confused . . . I thought missed something I went back and tracked my route via FlightAware, and watched/listened to my cockpit video. They...
Forum: RV General Discussion/News 08-02-2022, 06:19 AM
Replies: 12
Views: 1,604
Posted By BillL
Maybe a unique "RV Arrival" profile.

Funny comments, but seriously, mixing RV with cessna's and cubs could be improved. An RV corridor might help the landing phase would be the same. It would seem that consistent speeds and like...
Forum: RV Building Tips/Techniques 08-02-2022, 06:07 AM
Replies: 5
Views: 524
Posted By BillL
If you have a pneumatic squeezer install to full...

If you have a pneumatic squeezer install to full diameter flat sets, they are slightly crowned already. Use that to squeeze the flange to flatten and stretch it. The sets will slightly extrude the...
Forum: Painting your RV 08-01-2022, 05:34 PM
Replies: 5
Views: 688
Posted By BillL
According to the SDS (MSDS) it is methylene...

According to the SDS (MSDS) it is methylene chloride, methanol, and mineral spirits. I would not worry about inherent corrosion due to the ingredients.

Some paint removers do use caustic chemicals...
Forum: RV General Discussion/News 07-31-2022, 12:46 PM
Replies: 14
Views: 1,251
Posted By BillL
If this starter has a piggyback solenoid then I...

If this starter has a piggyback solenoid then I would look to that first. Long story, but it was the starter solenoid, cracked solder joint inherent to the skytec solenoid design.

What B&C starter...
Forum: RV-7/7A 07-31-2022, 08:45 AM
Replies: 5
Views: 524
Posted By BillL
Suggestion before calling done.

I left my tips until later and concluded it would have been better to have it done well before the final assembly. Fill rivet gaps, center holes of pull rivets and finish all the balancing with tips...
Forum: Traditional Aircraft Engines 07-31-2022, 05:52 AM
Replies: 18
Views: 1,588
Posted By BillL
Having been a mechanic and engine design&test...

Having been a mechanic and engine design&test engineer I would say the precision of the test repeatability may be in question but not the usefulness. It does take a measure of perspective and...
Forum: RV General Discussion/News 07-30-2022, 10:46 AM
Replies: 14
Views: 2,194
Posted By BillL
Purchase quantity not the problem . . . it is production.

If everyone bought for 2 yrs, it would not change a thing, production rate would not need to change - - if everybody suddenly buys all at once -now we have a problem. A nice lady stopped by my hangar...
Forum: RV-15 07-28-2022, 06:47 PM
Replies: 457
Views: 92,474
Posted By BillL
+1 My wife is not able to get in/out of any...

+1 My wife is not able to get in/out of any existing RV. I am excited for the very reasons above. Being an RV it will be efficient, safe, fun to fly and have all the advantages of an "experimental"....
Forum: RV Ongoing Maintenance Issues 07-28-2022, 11:25 AM
Replies: 65
Views: 11,285
Posted By BillL
Regarding the OP 14 rudder . . .

Hard to really say, but I believe the gust lock has some spring and slop. This allowed it to swing back and forth; the movement tended to push the lock closer to the pivot giving greater angle of...
Forum: RV-10 07-28-2022, 11:17 AM
Replies: 7
Views: 764
Posted By BillL
Disconnected thoughts.

Is it possible there is a higher frequency dynamic and the electronics has an aliasing capture issue? The fuel flow does not seem to change. PostEdit - -A damping orifice should fix that re Brians...
Forum: Traditional Aircraft Engines 07-27-2022, 03:03 PM
Replies: 18
Views: 1,588
Posted By BillL
Definitely not a transient issue.

Assuming you have definitely verified it is exhaust leaking- tube up exhaust and listening to tube. . . .

Looks like you are moving to the next stage(s). Visual inspection of open and closed valve....
Forum: RV-8/8A 07-27-2022, 06:44 AM
Replies: 37
Views: 2,608
Posted By BillL
yep - -And stiffness of the structure and/or...

yep - -And stiffness of the structure and/or backplate.
Forum: Traditional Aircraft Engines 07-27-2022, 06:39 AM
Replies: 18
Views: 1,588
Posted By BillL
350 hrs is in range for a possible valve...

350 hrs is in range for a possible valve sticking, but I think (hoping) Lyc has solved that with the M1B. Honestly I would go run it for 30-60 min at high power lean cruise and be careful on the full...
Forum: RV-7/7A 07-27-2022, 06:25 AM
Replies: 12
Views: 1,348
Posted By BillL
One thing affects others.

Several things going on there.

1. Builder X probably installed that piece either because the glass was goofed, or because they could not get the glass on/off because of the tail spring. Depending...
Forum: Tools 07-27-2022, 05:44 AM
Replies: 13
Views: 1,214
Posted By BillL
Agree w/Steve - more like MAC than Snap-On....

Agree w/Steve - more like MAC than Snap-On. Rugged, get the job done, some fall short.
Forum: Midwest 07-27-2022, 05:40 AM
Replies: 111
Views: 31,316
Posted By BillL
Tuesday Visit

I make a day of Tuesday from 7am Ripon arrival to a 6:45PM departure. I took my neighbor for the day, a first time for him! [Departed home 5am, arrived 8:50pm.]

RV15 - the pulled rivets are prime...
Forum: RV-15 07-27-2022, 05:07 AM
Replies: 8
Views: 2,549
Posted By BillL
Very fine article Paul. It really covers so many...

Very fine article Paul. It really covers so many questions.

I saw it in the raw yesterday and attended the first forum. The airplane aside I was really impressed with the RV15 Technical Team, the...
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