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Search: Posts Made By: rv6ejguy
Forum: Alternative Engines Yesterday, 05:55 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Charlie, when the gearbox is sent back, any...

Charlie, when the gearbox is sent back, any chance to get an SAE 2 flange installed or a dual pattern 1 and 2 installed? This would open up some other prop possibilities in the future for you.
Forum: Alternative Engines 10-28-2020, 05:07 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
My gear ratio is 2.2 and I run a 76 IVO in-flight...

My gear ratio is 2.2 and I run a 76 IVO in-flight adjustable from 115 to 145 inches pitch and similar engine rpms to you. I run about 125 inches pitch for TO and climb at about 2050 prop rpm and...
Forum: Alternative Engines 10-27-2020, 09:59 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
There is lots more power there and a great...

There is lots more power there and a great temptation to use it but usually at some cost-fuel flow, engine longevity etc. Like you say, performs well on what you have now. It's smart to keep the MAP...
Forum: Alternative Engines 10-27-2020, 05:47 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Ok, same as your earlier post so my analysis is...

Ok, same as your earlier post so my analysis is valid I believe.
Forum: Alternative Engines 10-26-2020, 02:14 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
The V trim compressor is very old, maybe...

The V trim compressor is very old, maybe something like 40 years now but can still work well if matched right.

Surge on automotive sized turbos is usually encountered only on rapid closed throttle...
Forum: Alternative Engines 10-26-2020, 12:32 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
I found your earlier post listing the wheel...

I found your earlier post listing the wheel inducer and exducer sizes and turbine housing A/R. If those are the same now, that would indicate these trims. In which case, you should be nowhere near...
Forum: Alternative Engines 10-26-2020, 08:50 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Charlie, are you running a V trim TO4 compressor...

Charlie, are you running a V trim TO4 compressor and Stage 3 T3 turbine with .63 A/R?
Forum: Alternative Engines 10-26-2020, 05:58 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Good progress Charlie. I might suggest removing...

Good progress Charlie.

I might suggest removing the BOV altogether. They don't serve any useful function, are just dead weight and another possible liability. I've never used one in 40+ years of...
Forum: RV-12/RV-12iS 10-25-2020, 09:47 AM
Replies: 18
Views: 850
Posted By rv6ejguy
Only the heads are liquid cooled on these...

Only the heads are liquid cooled on these engines. Oil temp would be the big concern.
Forum: RV-12/RV-12iS 10-25-2020, 07:42 AM
Replies: 18
Views: 850
Posted By rv6ejguy
Does Rotax have a minimum coolant temp published?

Does Rotax have a minimum coolant temp published?
Forum: Alternative Engines 10-23-2020, 03:02 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Ok, 1000F after the turbo probably means...

Ok, 1000F after the turbo probably means 1200-1300 before which is in the ballpark of where I'd expect it.

I think you have an EM-4 ECU. If you have V17 software, there are a couple choices for WB...
Forum: Alternative Engines 10-23-2020, 06:10 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
The temp delta on the rad is really good. EGTs...

The temp delta on the rad is really good.

EGTs seem really low if you're measuring at the ports, suggesting the mixture is maybe much richer than you think (AFR reading may be incorrect). This could...
Forum: Traditional Aircraft Engines 10-22-2020, 09:49 AM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Yes great post covering the important aspects....

Yes great post covering the important aspects.

I'd have to think that forces on the connecting rod are of little concern on a Lycoming. Peak CP and BMEP not too high to begin with and the rods are...
Forum: Traditional Aircraft Engines 10-22-2020, 08:50 AM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Dave is virtually always WOT, controlling power...

Dave is virtually always WOT, controlling power with RPM. Altitude and power setting is decided by mission, weather and O2 use.

By life, I mean, is typical TBO impacted? Nobody is going to do this...
Forum: Traditional Aircraft Engines 10-22-2020, 05:46 AM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Dave Anders often runs very low RPM in cruise...

Dave Anders often runs very low RPM in cruise getting some pretty incredible numbers. Low RPM cuts engine frictional losses quite a bit.

Does anyone have any data on how high MAP/ low RPM affects...
Forum: Traditional Aircraft Engines 10-21-2020, 06:04 PM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Here is a graphical representation of combustion...

Here is a graphical representation of combustion flame speed vs. AFR. This shows why fixed timing can't be optimized at both ROP and LOP. You'll lose some power on one or the other ends of the...
Forum: Traditional Aircraft Engines 10-21-2020, 06:00 PM
Replies: 52
Views: 4,098
Posted By rv6ejguy
You have a fast plane Dan. These are great...

You have a fast plane Dan. These are great numbers.

Curious how much speed would you lose here if you opened the cowl flap fully?
Forum: Traditional Aircraft Engines 10-21-2020, 01:43 PM
Replies: 52
Views: 4,098
Posted By rv6ejguy
We see about 4-5 knots come back on the RV-10,...

We see about 4-5 knots come back on the RV-10, depending on how far LOP we are.

Have some Lancair customers reporting 7 more knots over their mags when 50 LOP.

Flame speed is 30% slower at 17 AFR...
Forum: Traditional Aircraft Engines 10-20-2020, 03:50 PM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Agree. Our testing has shown best economy at...

Agree. Our testing has shown best economy at somewhere between 30 and 60 LOP (16-17 AFR), best power at around 100-125 ROP (12.5-13.5 AFR). The best power area is pretty flat as the video...
Forum: Traditional Aircraft Engines 10-20-2020, 02:38 PM
Replies: 12
Views: 696
Posted By rv6ejguy
Increased CR will give you more power as long as...

Increased CR will give you more power as long as the octane rating of the fuel allows you to optimize timing for PCP at the optimal crank angle.

Higher CR is your friend up high with an atmo engine....
Forum: Traditional Aircraft Engines 10-20-2020, 02:34 PM
Replies: 52
Views: 4,098
Posted By rv6ejguy
I've seen some comments here on VAF and some of...

I've seen some comments here on VAF and some of my YT vids basically saying "ok you're going slower so of course you burn less fuel".

If we look at the data from the Bonanza video and run the...
Forum: Traditional Aircraft Engines 10-20-2020, 12:18 PM
Replies: 12
Views: 696
Posted By rv6ejguy
Greg has the best data points from actual flight...

Greg has the best data points from actual flight testing with a similar setup and he's a smart guy on this stuff.

You could go to 9 to 1 and retard timing a couple more degrees at high MAP. The...
Forum: Fuel Injection Systems 10-20-2020, 10:11 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Update

We are continuing to work on the EM-6 software, of which a lot of this code as it's developed and tested, will find it's way into the latest EM-5 system before EM-6 release which is still far off in...
Forum: Electronic Ignition Systems 10-20-2020, 09:06 AM
Replies: 168
Views: 29,488
Posted By rv6ejguy
Perhaps we should move your post over the the LOP...

Perhaps we should move your post over the the LOP thread I just started so as not to dilute this thread about Surefly EI? https://vansairforce.com/community/showthread.php?t=188073
Forum: Traditional Aircraft Engines 10-20-2020, 06:02 AM
Replies: 52
Views: 4,098
Posted By rv6ejguy
Lean of Peak Operation

I'll start this out with a good video link on the subject: https://www.youtube.com/watch?v=h3bATVXMHQg

Our own testing on Les Kearney's RV-10 show similar gains in fuel economy as demonstrated here-...
Forum: Alternative Engines 10-20-2020, 05:50 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
All seems reasonable for now. Will be interesting...

All seems reasonable for now. Will be interesting to see how the planned mods affect the temps. Plug looks nice.
Forum: Electronic Ignition Systems 10-19-2020, 02:52 PM
Replies: 168
Views: 29,488
Posted By rv6ejguy
Aye, thread drift, so I won't contribute any more...

Aye, thread drift, so I won't contribute any more here. Someone can start a thread on the consequences of LOP operation on engine life.
Forum: Electronic Ignition Systems 10-19-2020, 10:45 AM
Replies: 168
Views: 29,488
Posted By rv6ejguy
You can cool with excess air or excess fuel. The...

You can cool with excess air or excess fuel. The air is cheaper.

Pull rpm back to 2400 and once you're below 25 inches MAP, you should be below 75% power.
Forum: Alternative Engines 10-19-2020, 06:00 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Auto conversions which typically develop more...

Auto conversions which typically develop more than twice the specific power as a Lyc. I've seen many piston failures on auto conversions where folks are in the mid 12s-13s AFR at high power. The Lyc...
Forum: Electronic Ignition Systems 10-19-2020, 05:55 AM
Replies: 168
Views: 29,488
Posted By rv6ejguy
I agree with Skylor. If you have a CS prop, leave...

I agree with Skylor. If you have a CS prop, leave it WOT, pull back the RPM a bunch and go LOP. Big reduction in CHTs. Radical as it sounds, we've have a few customers doing it for years now. No...
Forum: RV-14 10-19-2020, 05:51 AM
Replies: 10
Views: 1,320
Posted By rv6ejguy
If you're using gerotor type EFI pumps, 100...

If you're using gerotor type EFI pumps, 100 microns is too large to protect it.

Too many 90 degree fitting prior to the pump can induce vapor lock under hot and high conditions, especially with...
Forum: Alternative Engines 10-18-2020, 08:47 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
I'd try to stay in the low to mid 11s at TO and...

I'd try to stay in the low to mid 11s at TO and climb power.
Forum: Electronic Ignition Systems 10-18-2020, 08:46 PM
Replies: 168
Views: 29,488
Posted By rv6ejguy
Yes, the other EIs have no way to determine when...

Yes, the other EIs have no way to determine when you are LOP where more advance is required to achieve PCP at the optimal crank angle so as you say, they often have too much advance ROP to have...
Forum: Alternative Engines 10-18-2020, 05:50 PM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Good, this is even safer. Watch too little...

Good, this is even safer. Watch too little timing, can cause high EGTs though. You'll be down to 18 at high rpm and high MAP.

I limit my EGTs to 1400F.
Forum: Alternative Engines 10-18-2020, 10:59 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
There is pre-ignition and detonation but no...

There is pre-ignition and detonation but no pre-detonation.

If you had pre-ignition, you'd likely have no ground electrodes on the plugs and quarter sized holes in the pistons in less than 10...
Forum: Electronic Ignition Systems 10-18-2020, 09:24 AM
Replies: 168
Views: 29,488
Posted By rv6ejguy
The big reason is the engine cares very little...

The big reason is the engine cares very little about pressure altitude regarding ignition timing. MAP is the most significant parameter in the operational RPM range (2300-2700) followed by AFR.

The...
Forum: Alternative Engines 10-18-2020, 09:13 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Big congrats Charlie! Few people know the feeling...

Big congrats Charlie! Few people know the feeling of accomplishment and satisfaction of flying with a different powerplant than the masses use. You've taken the longer path but think of all the...
Forum: Safety 10-15-2020, 07:34 AM
Replies: 38
Views: 3,608
Posted By rv6ejguy
Merely responding to the outdated notion brought...

Merely responding to the outdated notion brought up here that auto engines are not able to sustain high hp levels for long periods of time in aircraft use.

Reliable flight time is the only gauge...
Forum: Safety 10-15-2020, 06:20 AM
Replies: 38
Views: 3,608
Posted By rv6ejguy
There are a few gearboxes out there with good...

There are a few gearboxes out there with good reliability such as the Marcotte M-300 which Russell and I both use. I have a number of customers flying behind SPG-4/5 boxes and we've seen good results...
Forum: Safety 10-14-2020, 12:16 PM
Replies: 38
Views: 3,608
Posted By rv6ejguy
Yet modern auto engines are validated to higher...

Yet modern auto engines are validated to higher standards at WOT/ full rated power than certified aircraft engines are required to be. Hyundai runs a 300 hours maximum power test on their engines and...
Forum: Alternative Engines 10-08-2020, 05:36 AM
Replies: 17
Views: 2,037
Posted By rv6ejguy
Scott Flandermeyer has had one in his -10 for...

Scott Flandermeyer has had one in his -10 for some time and posts regularly here. There are several threads if you search:...
Forum: Alternative Engines 10-07-2020, 05:46 AM
Replies: 617
Views: 114,932
Posted By rv6ejguy
Restrictors are only required with ball bearings...

Restrictors are only required with ball bearings not journal bearings This is almost certainly the cause of the bearing distress here. Seen this before and it led to a forced landing for one guy,...
Forum: Electronic Ignition Systems 10-06-2020, 07:13 AM
Replies: 19
Views: 1,261
Posted By rv6ejguy
I would always try to mount the ECU in a...

I would always try to mount the ECU in a reasonably accessible place as we've had more than a few customers mount them in places you need to be a contortionist to remove once the aircraft is all...
Forum: Electronic Ignition Systems 10-05-2020, 03:59 PM
Replies: 19
Views: 1,261
Posted By rv6ejguy
Lengths can depend a lot on routing. For instance...

Lengths can depend a lot on routing. For instance if you run the Hall cable down the engine spine and then over to one side to penetrate the firewall, that might add 18 inches.

Then if the ECU is...
Forum: Electronic Ignition Systems 10-04-2020, 08:27 PM
Replies: 62
Views: 6,295
Posted By rv6ejguy
Glad you resolved it Bill. I'll get Barry to...

Glad you resolved it Bill. I'll get Barry to contact you when he returns on this.
Forum: Fuel Injection Systems 10-04-2020, 07:40 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
SDS EM-5 Startup Problem

Greg, I moved this discussion over here instead of the CPI-2 thread to avoid confusion between the two systems. I hope that's ok.

To recap, Greg is sometimes getting fuel ignition on power up...
Forum: Electronic Ignition Systems 10-03-2020, 04:26 PM
Replies: 62
Views: 6,295
Posted By rv6ejguy
The CPI-2 is fundamentally different from the...

The CPI-2 is fundamentally different from the EM-5 in that coil power isn't routed through the ECU.

Your EM-5 experience is interesting. The ECU won't fire the coils until it sees a synch mag and...
Forum: Electronic Ignition Systems 10-03-2020, 10:27 AM
Replies: 62
Views: 6,295
Posted By rv6ejguy
Ok, I believe I understand now. Barry will...

Ok, I believe I understand now. Barry will hopefully be able to respond to you by email tonight sometime.
Forum: Electronic Ignition Systems 10-03-2020, 09:10 AM
Replies: 62
Views: 6,295
Posted By rv6ejguy
We've seen the popping issue sometimes on...

We've seen the popping issue sometimes on installations where there are no coil power switches (coil power comes on with the master). Just had another one last week. We'll send you a new ECU to...
Forum: Safety 10-03-2020, 09:00 AM
Replies: 39
Views: 3,966
Posted By rv6ejguy
I agree, system knowledge is a really good idea...

I agree, system knowledge is a really good idea and this pilot either didn't have any or didn't think about it. Only a fool begins a flight in an EDA without verifying that the alternator is working....
Forum: Safety 10-03-2020, 08:52 AM
Replies: 39
Views: 3,966
Posted By rv6ejguy
Doesn't matter what you have for an electrical...

Doesn't matter what you have for an electrical layout if the pilot makes so many fundamental errors in airmanship and the builder ignores proper switch labeling when we are talking about an EDA. No...
Forum: Safety 09-30-2020, 06:31 PM
Replies: 39
Views: 3,966
Posted By rv6ejguy
For EDA (electrically dependent aircraft),...

For EDA (electrically dependent aircraft), checklist items should include sitting battery voltage for primary and backup and charging voltage from the alternator once the engine is running. Unless...
Forum: Safety 09-30-2020, 08:46 AM
Replies: 39
Views: 3,966
Posted By rv6ejguy
The Viking engine is equipped with EFI/EI and is...

The Viking engine is equipped with EFI/EI and is electrically dependent. In this case, it had 3 power sources installed, 2 of which were effectively not available due to pilot mismanagement. The lack...
Forum: RV Friends Who Have Passed On 09-28-2020, 05:13 AM
Replies: 14
Views: 4,215
Posted By rv6ejguy
Thanks for the fitting Tribute to Ken here and...

Thanks for the fitting Tribute to Ken here and how he enriched your life as he did many others.
Forum: RV Friends Who Have Passed On 09-27-2020, 03:44 PM
Replies: 14
Views: 4,215
Posted By rv6ejguy
I couldn't believe it when I heard the news, the...

I couldn't believe it when I heard the news, the blood just drained from my face. I don't think there was a more experienced Rocket pilot than Ken anywhere. He's done countless airshows all over...
Forum: Fuel Injection Systems 09-20-2020, 09:24 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Thanks Greg. You had a couple atypical issues...

Thanks Greg. You had a couple atypical issues early on so I'm glad you are happy with the system and enjoying it now. Always nice to work with mechanical savvy guys like you. :)
Forum: Fuel Injection Systems 09-19-2020, 12:10 PM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Thanks for the kudos Brian. We tried to help out...

Thanks for the kudos Brian. We tried to help out all the Egg customers who were left stranded. Quite a number are still flying with their Sube packages.
Forum: Fuel Injection Systems 09-19-2020, 10:39 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Rotax Parts

Some more awesome work from Trevor.

2nd batch of Rotax 912 EFI parts back from the anodizer now. On the right are some new vacuum fittings we decided to supply with the kits to make connections to...
Forum: Fuel Injection Systems 09-19-2020, 07:34 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
I agree. Further away is better. It's difficult...

I agree. Further away is better. It's difficult to say how things will be affected.

In the early days starting with the EM-3, we used to test for EMI/RFI issues by placing the the ECU upside down,...
Forum: Fuel Injection Systems 09-17-2020, 05:46 PM
Replies: 79
Views: 22,981
Posted By rv6ejguy
YouTube

Thanks to the many folks on VAF who have subscribed to our YT channel- today putting us over the 500 mark. :)

Sorry for the lack of flying content lately. Hopefully we can get back to that soon.
Forum: Fuel Injection Systems 09-17-2020, 03:15 PM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Parallel for a couple feet is bad, crossing at 90...

Parallel for a couple feet is bad, crossing at 90 deg, 1/2 inch away is probably no issue.
Forum: Fuel Injection Systems 09-17-2020, 08:03 AM
Replies: 79
Views: 22,981
Posted By rv6ejguy
Update and a Caution

The new Gen 3 Rotax 912 EFI kits will start shipping to initial customers next week.

A word of caution on EFI installations and I've mentioned this before here, never tie wrap engine sensor cables...
Showing results 1 to 62 of 500

 
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