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Search: Posts Made By: blaplante
Forum: RV Building Tips/Techniques 08-10-2022, 08:45 PM
Replies: 9
Views: 583
Posted By blaplante
My quadrant is mounted on the panel. No center...

My quadrant is mounted on the panel. No center post for me.
Forum: RV Building Tips/Techniques 08-10-2022, 05:19 PM
Replies: 9
Views: 583
Posted By blaplante
I actually took a Cherokee quadrant and made it...

I actually took a Cherokee quadrant and made it work. Had to fab some parts, shorten the arms, and I think I modified it so the cable exit angle was better. Sorry I've forgotten all the details. I...
Forum: RV-12/RV-12iS 08-10-2022, 05:12 PM
Replies: 5
Views: 454
Posted By blaplante
OKB jump traffic & pattern

Beware of two things at OKB:

VERY noise sensitive. You are expected to fly to the I5/coast before turning crosswind when departing 25. Similarly base for 07 is way out there.

right downwind for...
Forum: Traditional Aircraft Engines 08-09-2022, 05:39 PM
Replies: 5
Views: 251
Posted By blaplante
I should be able to help you out. I have a Catto,...

I should be able to help you out.
I have a Catto, and an (I) O-320-H2AD

First thing, I need TAS not IAS. If you don't have a Dynon or something that calculates TAS, then we need actual GS on a 3...
Forum: Traditional Aircraft Engines 08-08-2022, 05:31 PM
Replies: 17
Views: 1,345
Posted By blaplante
Ah, been there. Note the black shiny patches on...

Ah, been there. Note the black shiny patches on the exhaust valve seat area. You should have a nice constant ring, not a bunch of non-interconnected patches. That is lead build up on the exhaust...
Forum: Traditional Aircraft Engines 08-08-2022, 10:28 AM
Replies: 10
Views: 266
Posted By blaplante
To be clear - balanced injectors has nothing to...

To be clear - balanced injectors has nothing to do with CHT.
It is EGT... BUT you aren't looking for equal EGT temps... rather that ALL cylinders hit their peak at the same point in leaning. So 1...
Forum: RV General Discussion/News 08-08-2022, 07:46 AM
Replies: 8
MPG
Views: 725
Posted By blaplante
Google Maps says Raton to St. Johns is 421 miles...

Google Maps says Raton to St. Johns is 421 miles (or 484 NM), so distance covered is substantially shorter. Most of the route is interstate: I-25 and I-40. The one bit that is unfair is that St....
Forum: Traditional Aircraft Engines 08-08-2022, 07:37 AM
Replies: 10
Views: 266
Posted By blaplante
Could be a partially blocked injector or 'spider'...

Could be a partially blocked injector or 'spider' port.
Do a flow test. [4 small bottles for the lines to squirt into]
Should be information around somewhere ex Airflow Performance website on how to...
Forum: RV General Discussion/News 08-07-2022, 04:36 PM
Replies: 8
MPG
Views: 725
Posted By blaplante
I think engine time is tach time, which is based...

I think engine time is tach time, which is based on RPM, so running less RPM on your fixed pitch won't actually cause more engine hours for a given flight. At least that's my understanding.
Forum: RV General Discussion/News 08-07-2022, 12:48 PM
Replies: 3
Views: 344
Posted By blaplante
Which/what CNC

It is one of these https://www.youtube.com/watch?v=nobExDW7gEk
Tormach PCNC 1100 (I think an earlier model)
So 3 axis / mill / router type.

So no 90 degree inside corners due to the bit diameter. ...
Forum: RV General Discussion/News 08-07-2022, 10:58 AM
Replies: 8
MPG
Views: 725
Posted By blaplante
MPG

Given current fuel prices (and a retirement income), I did some more experimentation with LOP operation on my cross country flying (MN to CA). Yesterday flew from KRTN via KLVS, OTO, to KSJN. Flew...
Forum: RV General Discussion/News 08-07-2022, 09:17 AM
Replies: 3
Views: 344
Posted By blaplante
Some CNC ideas?

My nephew has gotten a pretty capable CNC machine... it can cut stainless. Which got me thinking that there must be lots of small things he could make small runs of that would be useful for our...
Forum: Electrical Systems 07-23-2022, 09:12 PM
Replies: 12
Views: 856
Posted By blaplante
Free opinion, worth what it cost you.... I think...

Free opinion, worth what it cost you....
I think soldering them will be really difficult. So I'd discard that idea.

I think I'd use a hydraulic crimper, crimp on terminal ends (4 pieces) and bolt...
Forum: RV Ongoing Maintenance Issues 07-22-2022, 11:47 AM
Replies: 10
Views: 907
Posted By blaplante
Did you recheck the breakout force? A fish scale...

Did you recheck the breakout force? A fish scale works, I use a luggage scale that holds the peak reading. Check to the left and to the right.
Forum: Traditional Aircraft Engines 07-18-2022, 10:19 AM
Replies: 74
Views: 4,590
Posted By blaplante
Same altitude... MSL or DA? And somehow from my...

Same altitude... MSL or DA?
And somehow from my testing I suspect flying same DA at wildly different temperatures won't be comparable. Just my hunch.
Forum: RV-6/6A 07-16-2022, 09:07 AM
Replies: 10
Views: 1,142
Posted By blaplante
That's a good starting point. The bible is...

That's a good starting point.
The bible is actually the Lycoming operators manual.

https://www.google.com/search?client=opera&q=lycoming+o-360+operator%27s+manual&sourceid=opera&ie=UTF-8&oe=UTF-8
Forum: RV General Discussion/News 07-12-2022, 04:22 PM
Replies: 37
Views: 3,314
Posted By blaplante
Another idea: Lightweight Flywheel? Not a cheap...

Another idea: Lightweight Flywheel?
Not a cheap option. Can save a pound.

Note that the Dynon D3 uses GPS for altitude and airspeed. If the main purpose is as a attitude gyro in a crunch (and you...
Forum: RV General Discussion/News 07-12-2022, 08:55 AM
Replies: 37
Views: 3,314
Posted By blaplante
Electric Gyros are suprisingly heavy. You could...

Electric Gyros are suprisingly heavy. You could put in a dynon D3 and drop around 2 pounds.

My PC680 box is steel. Surprised yours is aluminum.

Whelen Strobe packs vary a good bit in weight. I...
Forum: Electrical Systems 07-11-2022, 09:15 PM
Replies: 4
Views: 543
Posted By blaplante
Mouser!

https://www.mouser.com/c/electromechanical/audio-devices/piezo-buzzers-audio-indicators/?q=sonalert

You can filter by dB, voltage, etc.
Note that aircraft "12 volts" is actually 14 or so when...
Forum: RV General Discussion/News 07-11-2022, 09:10 PM
Replies: 37
Views: 3,314
Posted By blaplante
Gyros?

Do you have conventional gyro instruments? They are surprisingly heavy. Something like a Garmin G5 or Dynon D10a / D6 can shed a few pounds.

Sound deadening material can really add up quick as...
Forum: RV General Discussion/News 07-08-2022, 09:37 AM
Replies: 31
Views: 2,706
Posted By blaplante
I used 1/4 turn Skybolt or equiv. on the upper...

I used 1/4 turn Skybolt or equiv. on the upper firewall. Pleased with that. Later retrofitted them in on the bottom at the firewall. Should have done that originally as the hinges didn't last long...
Forum: VAF Classifieds (posts in here deleted after 30 days) 07-06-2022, 07:34 AM
Replies: 3
Views: 879
Posted By blaplante
Sent you a PM.

Sent you a PM.
Forum: Traditional Aircraft Engines 06-26-2022, 09:00 PM
Replies: 13
Views: 1,556
Posted By blaplante
#3 is a classic. 1- Do you have the 'washer...

#3 is a classic.

1- Do you have the 'washer trick' installed?
2- Check at the base of the #3 cylinder where it joins the aft baffle. Frequently overlooked is a tab that is supposed to be bent to...
Forum: RV-9/9A 06-25-2022, 10:43 PM
Replies: 44
Views: 3,841
Posted By blaplante
That's correct, Van's recommends 160HP or less in...

That's correct, Van's recommends 160HP or less in the 9.

Real men put 200+ HP in 'em. Cause it's EXPERIMENTAL and ya can do anything ya want! After all we're sure there's plenty of design margin...
Forum: RV-6/6A 06-25-2022, 06:58 PM
Replies: 7
Views: 572
Posted By blaplante
Also, way back when, Van's sent the gear legs...

Also, way back when, Van's sent the gear legs UNDRILLED. I think I have 2 of those in the crate somewhere.
Forum: Traditional Aircraft Engines 06-23-2022, 04:42 PM
Replies: 26
Views: 2,609
Posted By blaplante
I think most of us start off with bold ideas of...

I think most of us start off with bold ideas of not gluing (w/RTV) our baffles to the engine, but quickly practicality and reality sinks in. And I'm a guy that made my VS top fairing removable,...
Forum: RV-8/8A 06-20-2022, 05:06 PM
Replies: 20
Views: 1,994
Posted By blaplante
Well, ya, that's not going to help!!! A multi...

Well, ya, that's not going to help!!! A multi square inch leak from the upper (high pressure) to lower cowl. I am surprised you can maintain any decent CHT at all.
Forum: Alternative Engines 06-19-2022, 11:52 AM
Replies: 68
Views: 10,633
Posted By blaplante
Reduction Drive?

Is the reduction drive from Yamaha? Is it designed for the thrust load?
Forum: RV Ongoing Maintenance Issues 06-18-2022, 08:08 AM
Replies: 10
Views: 1,392
Posted By blaplante
Hoses... https://www.aopa.org/news-and-media/all-...

Hoses...

https://www.aopa.org/news-and-media/all-news/2018/august/09/aircraft-hoses
Forum: RV General Discussion/News 06-18-2022, 08:04 AM
Replies: 15
Views: 1,677
Posted By blaplante
I 3d printed mine. Another justification for the...

I 3d printed mine. Another justification for the machine!
Forum: RV-7/7A 06-17-2022, 05:36 PM
Replies: 1
Views: 338
Posted By blaplante
Trim the fairing so it does go up that far. The...

Trim the fairing so it does go up that far. The NG leg fairing really only needs to get up to the level of the bottom of the lower cowl.
And the NG leg fairing is supposed to have a hose clamp...
Forum: RV General Discussion/News 06-06-2022, 08:37 AM
Replies: 17
Views: 1,862
Posted By blaplante
One thing not mentioned which might be applicable...

One thing not mentioned which might be applicable --- Lycon does cylinder work that would add about 20 HP to a stock engine via porting. So it is possible to take a 160 HP O-320 and get more HP out...
Forum: RV Ongoing Maintenance Issues 06-04-2022, 09:15 PM
Replies: 23
Views: 11,922
Posted By blaplante
hence why my tip has nutplates and is...

hence why my tip has nutplates and is removable.
think about maintenance when building!
Forum: Engine Monitors 05-23-2022, 06:23 PM
Replies: 6
Views: 616
Posted By blaplante
Very interesting Steve, thanks for sharing.

Very interesting Steve, thanks for sharing.
Forum: Engine Monitors 05-22-2022, 01:36 PM
Replies: 6
Views: 616
Posted By blaplante
I'm pretty sure the VDO probes aren't...

I'm pretty sure the VDO probes aren't thermocouples.
Forum: RV General Discussion/News 05-20-2022, 10:29 AM
Replies: 22
Views: 2,666
Posted By blaplante
A coordinated steep turn shouldn't matter to...

A coordinated steep turn shouldn't matter to float type senders as the fuel shouldn't move outboard in a coordinated turn.

Capacitive senders OTOH, I'm less sure about. Recently doing a calibration...
Forum: RV General Discussion/News 05-18-2022, 10:44 PM
Replies: 46
Views: 5,767
Posted By blaplante
Early morning (like EARLY!) and near sunset are...

Early morning (like EARLY!) and near sunset are great times to fly. The turbulence dies down, the temps are better, and the view is even prettier.
Forum: RV Building Tips/Techniques 05-18-2022, 10:40 PM
Replies: 33
Views: 3,571
Posted By blaplante
I added a stainless panel, with fiberfrax under...

I added a stainless panel, with fiberfrax under it, to the area aft of the cowl, on the underside of the aluminum floor.

So, while we're at it, time to get all that foam rubber off the floor. And...
Forum: RV-9/9A 05-18-2022, 12:06 PM
Replies: 13
Views: 2,368
Posted By blaplante
And...

And I guess we'll never know!
Forum: RV General Discussion/News 05-17-2022, 10:06 PM
Replies: 22
Views: 2,666
Posted By blaplante
Fast Filling & not full

I stopped for fuel in SD a while back. Noted that my bill was less than expected. Checked caps for security and sumped the tanks. Figured out why the bill oddity on start up... they didn't fill...
Forum: Engine Monitors 05-17-2022, 05:08 PM
Replies: 6
Views: 616
Posted By blaplante
Oil Temp Thermocouple Fault - reading high?

I'll fess up, I'm a EEng, and I'm not sure how this could happen, but maybe someone here knows.

Is it possible for a thermocouple sensor to fail / intermittent in a way where it reads HIGH? I know...
Forum: Midwest 05-15-2022, 11:40 AM
Replies: 0
Views: 182
Posted By blaplante
Looking for A&P for Annual near Detroit Lakes MN

Looking for A&P for Annual near Detroit Lakes MN for an RV6. Asking for a buddy. Timeframe would be late June.

Thank you.
Forum: Traditional Aircraft Engines 05-15-2022, 11:35 AM
Replies: 4
Views: 1,097
Posted By blaplante
Alterate?

Yes, I have some info which I can share via private messaging.
Forum: Traditional Aircraft Engines 05-04-2022, 10:47 AM
Replies: 5
Views: 1,137
Posted By blaplante
Looking forward to your measurment! And also...

Looking forward to your measurment!
And also thanks for the education on the flange size. I wasn't aware of that!
Forum: RV Ongoing Maintenance Issues 05-03-2022, 03:28 PM
Replies: 23
Views: 2,456
Posted By blaplante
Carb or Injection? Check the p-lead wiring that...

Carb or Injection?

Check the p-lead wiring that there isn't rubbing / short say on the firewall pass-thru and elsewhere.
Forum: RV Ongoing Maintenance Issues 05-03-2022, 12:15 PM
Replies: 23
Views: 2,456
Posted By blaplante
Hours in service on the mag?

Hours in service on the mag?
Forum: Glass Cockpit 05-03-2022, 09:10 AM
Replies: 17
Views: 2,013
Posted By blaplante
And Ditto for the D10a ... I'd love to upgrade...

And Ditto for the D10a ... I'd love to upgrade that display. No high bright option but if I knew the standard display part number I might find a solution.
Forum: Traditional Aircraft Engines 05-02-2022, 05:44 PM
Replies: 5
Views: 1,137
Posted By blaplante
Curious too

Some time back I bought some exhaust wrap - to put on my intakes. Typical Jegs / Summit stuff. Never got around to installing it.

Many will say it makes no difference because of the small amount...
Forum: RV General Discussion/News 05-01-2022, 08:17 AM
Replies: 37
Views: 4,098
Posted By blaplante
50 ROP

Oh, 50 ROP. Check out https://www.avweb.com/ownership/the-savvy-aviator-59-egt-cht-and-leaning/

Summary - The advice is to run 100 ROP if you are running ROP.
Curious how much that would help you.
Forum: RV General Discussion/News 04-30-2022, 10:46 PM
Replies: 37
Views: 4,098
Posted By blaplante
OK, I had an optical illusion when I looked at...

OK, I had an optical illusion when I looked at the temp sensor pic. However... you are also measuring how much the air was warmed by the exhaust pipes / headers.

#4 is the hottest cylinder, so...
Forum: RV General Discussion/News 04-30-2022, 04:59 PM
Replies: 37
Views: 4,098
Posted By blaplante
Radiant Heat?

Oh, isn't that temperature bulb going to get radiant heat from the exhaust pipe? I think you need to shield it so it can't see the IR radiation.
Forum: RV General Discussion/News 04-30-2022, 04:54 PM
Replies: 37
Views: 4,098
Posted By blaplante
Today's results?

Were today's results with or without the deflectors on the front cylinders?

How many HP is this engine supposedly?
Forum: Glass Cockpit 04-29-2022, 08:42 AM
Replies: 11
Views: 1,255
Posted By blaplante
I put mine in the outer portion of the NACA air...

I put mine in the outer portion of the NACA air vent. Not ideal for several reasons:
the sides of the cowl leak some and so it will read high by a bit, and it is exposed to sunlight which can also...
Forum: RV General Discussion/News 04-28-2022, 09:59 PM
Replies: 28
Views: 2,597
Posted By blaplante
another angle

Look at this another way.
Typically you'll hit WOT and 75% power at around 7500' DAlt.

If you have an effective ram air inlet, you can still make 75% power at a yet higher altitude, where you'd have...
Forum: RV Building Tips/Techniques 04-28-2022, 08:51 PM
Replies: 21
Views: 1,968
Posted By blaplante
Interesting point. I would have thought that...

Interesting point. I would have thought that reducing the turbulent uncoordinated flow in the lower cowl (even if just the oil cooler contribution) would reduce cooling drag and/or airframe drag.
Forum: RV General Discussion/News 04-27-2022, 10:03 PM
Replies: 5
Views: 447
Posted By blaplante
9600 baud is the speed. The protocols might not...

9600 baud is the speed. The protocols might not be matching.
A bit like saying send the morse code at 10 words per minute (sets the speed), but the guy is sending in French and you expected English....
Forum: RV General Discussion/News 04-25-2022, 07:25 PM
Replies: 37
Views: 4,098
Posted By blaplante
If the cylinders are balanced, don't remove or...

If the cylinders are balanced, don't remove or cut the dams in front of #1 and #3. all that'll happen is you will cool the front cylinders more and the back ones less.

I HAVE FULL SIZE dams. ...
Forum: RV General Discussion/News 04-24-2022, 10:31 PM
Replies: 37
Views: 4,098
Posted By blaplante
If the oil cooler is mounted to the engine mount,...

If the oil cooler is mounted to the engine mount, how well does your seal work when the engine thrust causes the engine to shift (a bit) forward? The Lord mounts will give a bit.

If not baffle...
Forum: RV General Discussion/News 04-24-2022, 10:26 PM
Replies: 37
Views: 4,098
Posted By blaplante
How well is the airbox cowl inlet to airbox...

How well is the airbox cowl inlet to airbox sealing? A poor seal there pushes air into the lower cowl... with result of less delta P between upper and lower cowl.

Seems to be a common area for a...
Forum: RV Building Tips/Techniques 04-24-2022, 11:57 AM
Replies: 13
Views: 1,012
Posted By blaplante
Current not Voltage

So it shows the circuit is drawing current. If the wire fell off the pump, there's still voltage after the light, but no current. So detecting current is a step up towards knowing the pump is...
Forum: RV-9/9A 04-21-2022, 04:04 PM
Replies: 13
Views: 2,368
Posted By blaplante
Best Speed Altitude

Typically Best Speed will be at 7500' Density Altitude and Wide Open Throttle, which should give very close to 75% power.

Higher or lower than that will not be as good. NOTE, DA, not MSL.

If you...
Forum: Traditional Aircraft Engines 04-18-2022, 10:27 PM
Replies: 108
Views: 35,319
Posted By blaplante
[QUOTE=echostar7;1602934]I put the boroscope in...

[QUOTE=echostar7;1602934]I put the boroscope in to look at the seals around cyl 1 and 3 with cowl on, behind cyl 3 this segment is kinked downward, and maybe isn't sealing from airflow.


Look for...
Forum: RV Building Tips/Techniques 04-18-2022, 03:00 PM
Replies: 21
Views: 1,968
Posted By blaplante
CHT not OT

Seems like just about every RV6 and 7 that I know has issues with CHT (which can be addressed by sealing the dozens of leak paths), while concurrently having no Oil Temp issue. Now if you have an...
Forum: RV-8/8A 04-14-2022, 09:02 AM
Replies: 10
Views: 1,516
Posted By blaplante
Screws for me

I also used screws. about 300 hours, no issues including flying in 100+ and near freezing temps. Drill and tap. Put the heavy rubber type electrical tape between the canopy and the plexi. Put...
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