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Search: Posts Made By: grubbat
Forum: RV General Discussion/News Yesterday, 07:01 AM
Replies: 33
Views: 1,987
Posted By grubbat
Something to consider

During your practical you may need to file a flight plan in which you will probably use GPS approach for your destination airport. All is good. However, for your alternate airport, what approach will...
Forum: RV Ongoing Maintenance Issues 04-12-2019, 07:34 PM
Replies: 27
Views: 2,811
Posted By grubbat
320 is the one

Bill is a maverick. Donít put a 360 on the -9. The 320 does just fine and with a constant speed prop, itís a sweet combination. Besides the -360 is too much power for that airframe. Also, If you do...
Forum: Electrical Systems 04-02-2019, 09:21 PM
Replies: 51
Views: 3,717
Posted By grubbat
Earths offline

I had an Earthx that would go offline when starting, sometimes when flying. It was only 1 yr old. No way to get it back online till I put ground power to it. I have dual panel with some glass and...
Forum: Traditional Aircraft Engines 02-11-2019, 12:58 PM
Replies: 32
Views: 3,657
Posted By grubbat
My Recommendation

My recommendation, for what it is worth, is to run straight weight 100plus during the summer months and multiweight 5w15 during the winter months. Easy to start in winter and good protection for the...
Forum: RV-10 12-30-2018, 04:29 PM
Replies: 23
Views: 6,442
Posted By grubbat
Indicated vs True

Descending out of 17,000ft at VNE (not recommended), the RV-10 would need to keep indicated airspeed around 148kts or less due to the weaker structure. It is true air speed limited to 200kts.

On...
Forum: RV-9/9A 12-29-2018, 02:33 PM
Replies: 20
Views: 4,776
Posted By grubbat
Too fast

Bill,
You need to read the article about putting that super big engine on your -9 and stay below 156kts. Shame shame shame.😄

On a serious note, 28mpg is pretty good. Was that on a three-way gps...
Forum: Traditional Aircraft Engines 12-20-2018, 12:51 PM
Replies: 11
Views: 2,491
Posted By grubbat
AD's

Experimental stuff don't have AD's that I am aware of.
Forum: RV General Discussion/News 12-20-2018, 12:48 PM
Replies: 9
Views: 1,054
Posted By grubbat
Rebate

My tailbeacon flagged a couple of items the first time I went up. UAvionix suggested I change the threshold. This resulted in no red items on the performance report and qualified for the uAvionix...
Forum: Traditional Aircraft Engines 12-14-2018, 12:45 PM
Replies: 7
Views: 2,505
Posted By grubbat
Pile on also

Lycoming has a fantastic piston making machine. They also assemble the cylinders on site. They are bringing back in-house a lot of things that they once outsourced during the lean years when profits...
Forum: ADS-B 12-14-2018, 12:36 PM
Replies: 13
Views: 1,724
Posted By grubbat
the rest of the story.....

Ok Michael, now that we have the ins/outs' of the ADSb dilemma, would you care to share the info on the L-39? I thought about buying one but the fuel burn...... was rather bloody discouraging...

By...
Forum: Probable Cause Documents Discussed 12-10-2018, 07:18 PM
Replies: 22
Views: 7,155
Posted By grubbat
-9 wing

The -9 Wing does a lot of things well but one thing it doesn’t do well at low airspeed is retain energy. Poof it’s gone, or something like that. The cubs and late model maules that I had been...
Forum: RV General Discussion/News 12-07-2018, 02:03 PM
Replies: 27
Views: 1,991
Posted By grubbat
Same here

Greg,
Iíve got the same thing as you do in cruise so Iíll be watching this thread to see if any gains can be found. Mine also appears to be ⅝ to ĺ high at cruise.
Forum: RV General Discussion/News 12-07-2018, 09:00 AM
Replies: 17
Views: 2,156
Posted By grubbat
amazon boroscop

I bought one of those cheap boroscopes that works off the wifi on the phone. The scope has this miniture mirror that screws on and is supposed to be able to see the valves. It has a rechargable...
Forum: RV General Discussion/News 12-07-2018, 08:28 AM
Replies: 10
Views: 628
Posted By grubbat
Avionics Shops

My first go-to shop is Renrag Aviation at Thomaston Airport. David Garnder is good to work with. Second would be On the Beam Aviation at Hampton GA. Sam Nipper is also a good tech. That being said,...
Forum: RV-8/8A 12-04-2018, 06:39 AM
Replies: 38
Views: 5,906
Posted By grubbat
Condensation

One of the big negatives of having a heater come on when itís cold is that if you donít fly, you could be setting up the perfection condensation atmosphere in your Lycoming. Iíve heard a story about...
Forum: Electronic Ignition Systems 12-01-2018, 05:01 PM
Replies: 53
Views: 6,477
Posted By grubbat
Props

I always thought it was interesting that the prop mfg state that the EI setup can give a different vibration mode.
Forum: RV General Discussion/News 11-29-2018, 10:08 AM
Replies: 14
Views: 1,086
Posted By grubbat
pics and signature

I would also suggest that you take a bunch of pictures of inside packaging and also get the receiving person where you drop off the prop to sign a statement stating that it is packaged correctly. If...
Forum: Electrical Systems 11-22-2018, 05:42 PM
Replies: 11
Views: 2,557
Posted By grubbat
Update

I sent my Earthx battery back for evaluation and went ahead and bought another one and all problems solved. Waiting to hear what happened to my original 1 yr old Earthx.
Forum: RV General Discussion/News 11-20-2018, 08:47 AM
Replies: 30
Views: 2,513
Posted By grubbat
6-pack

If you are an old 6-pack person, then I would suggest go with option 1. Your 6-pack trained eyes will like the go-to steam while you are adjusting to glass. I am a little old school and also have...
Forum: RV General Discussion/News 11-20-2018, 06:52 AM
Replies: 55
Views: 16,962
Posted By grubbat
Sorry

Don,
Sorry you had to do what you did. Itís a shame sometimes that in life, you bend over backwards for folks all the time and then the one time you need a favor or a little help, all you hear is...
Forum: RV-7/7A 11-18-2018, 03:18 PM
Replies: 15
Views: 2,591
Posted By grubbat
Rudders

Mark,
First, there are a lot of -7/-9 rudders flying around that have not departed the vertical. So the design isnít defective, just maybe less tolerant to over speed events such as dog fighting,...
Forum: RV General Discussion/News 11-18-2018, 07:22 AM
Replies: 48
Views: 12,531
Posted By grubbat
Yes

Yes, it bolts right up. You need to replace the little fiberglass tip on the vertical. Keep in mind that the larger -7 rudder will give a little better spin recovery over the -8 rudder (1 to 1.5...
Forum: RV General Discussion/News 11-18-2018, 06:09 AM
Replies: 48
Views: 12,531
Posted By grubbat
Another option

Another option is to put a -8 rudder on the -7. More than one person has gone that route for looks and in my opinion, more margin.
Forum: RV General Discussion/News 11-17-2018, 06:19 PM
Replies: 48
Views: 12,531
Posted By grubbat
Maybe a defected bird unzipped it

Maybe the bird deflected off the horizontal or vertical, hit the rudder hard enough to unzip it, then it was all history at that point. What ever the official reason, reading a report of finding...
Forum: Electrical Systems 11-15-2018, 05:47 PM
Replies: 11
Views: 2,557
Posted By grubbat
Yes, I’ve got diodes on the solenoids. The...

Yes, I’ve got diodes on the solenoids. The ability of a lead acid battery to absorb spikes is a nice feature. I’m suspecting that the EarthX has a higher current draw when recharging and the...
Forum: RV General Discussion/News 11-15-2018, 03:36 PM
Replies: 7
Views: 736
Posted By grubbat
Cowling Fire bottles

We had two fire bottles mounted in the cowling for the L1011 back in the day. Maybe the cowl would be a good place to put them if you could fit them in there. May only buy you seconds but who know,...
Forum: Electrical Systems 11-15-2018, 03:34 PM
Replies: 11
Views: 2,557
Posted By grubbat
Review

Iíve been running EarthX for a couple of years and I really like the low weight and fast starts. However, I am in the middle of troubleshooting some things that may or may not be EarthX related....
Forum: ADS-B 11-08-2018, 11:10 AM
Replies: 23
Views: 3,911
Posted By grubbat
Another option

I just did the Uavionics tailbeacon on my -9 from Adventure Pilot. Took me about 5 minutes to install. They are currently offering a $150.00 rebate on these units ($1500.00). Gives the anonymous...
Forum: RV-10 11-06-2018, 01:03 PM
Replies: 23
Views: 6,442
Posted By grubbat
That wing

There is something about hummming along at 12,500ft and looking out at that beautiful wing doing its thing. And rough air penetration is a bonus.
Forum: RV-10 11-05-2018, 08:12 PM
Replies: 23
Views: 6,442
Posted By grubbat
Gee thanks

Thanks for sharing Ivan. Last thing I need to hear right now is from a former Comanche 260 driver telling me how the RV-10 is a better ride..... even if it is the truth. ;)

My 1965 straight 260 is...
Forum: RV-9/9A 11-05-2018, 04:16 PM
Replies: 10
Views: 1,842
Posted By grubbat
No mine

Iíve never experienced this on my -9.
Scott may comment more precisely on the factory model.
Forum: RV General Discussion/News 11-04-2018, 06:00 PM
Replies: 14
Views: 1,796
Posted By grubbat
Typical

On my last oil change, oil was reading a little under 5 qts so I added two quarts of 5w40 non synthetic rotella diesel oil, flew for an hour, then drained the hot oil. The new rottella did a great...
Forum: RV General Discussion/News 11-01-2018, 08:22 AM
Replies: 29
Views: 3,876
Posted By grubbat
Very good question Bob, especially with the...

Very good question Bob, especially with the one-screen-wonder out there. Itís amazing how bright everything gets when that one high-dollar screen goes blank for no reason at all when in the clouds....
Forum: Fuel Injection Systems 11-01-2018, 08:08 AM
Replies: 117
Views: 21,443
Posted By grubbat
O-ring Part Number

Ross,
Do you have the o-ring specs? I need to get a couple of spares.
Thanks,
Cj
Forum: RV-9/9A 11-01-2018, 08:01 AM
Replies: 14
Views: 2,971
Posted By grubbat
Good question

I seem to recall the late Bob Axsom using max rpm of 2700 when racing to get peak HP and fastest speed. My engine produces max hp at 2700 rpm and I am limited by prop mfg to not exceed the rpm past...
Forum: RV General Discussion/News 10-30-2018, 09:19 PM
Replies: 28
Views: 7,903
Posted By grubbat
Design work and experiment before launch

A friend of mine designed a release mechanism to drop the ashes out the window of his Cessna. He said when he opened it, most of the ashes ended up in his mouth and ears and down his shirt. His...
Forum: Electrical Systems 10-19-2018, 02:23 PM
Replies: 66
Views: 6,517
Posted By grubbat
Otis, There is a lot of info that has been...

Otis,
There is a lot of info that has been written here over the years for and against this type of product in our experimental endeavors. Some folks swear by these devices, some folks are raw about...
Forum: RV Ongoing Maintenance Issues 10-19-2018, 06:40 AM
Replies: 24
Views: 3,317
Posted By grubbat
Cylinders

I may have missed this but who made the cylinders? ECI, Superior, Lycoming, Continental, etc?
Forum: Traditional Aircraft Engines 10-14-2018, 05:33 AM
Replies: 7
Views: 1,069
Posted By grubbat
Oils

There are some automotive oils that are really good at cleaning due to the detergent package. Maybe after draining your regular aviation oil, put some rotella diesel oil 20w50 and fly it for a couple...
Forum: RV General Discussion/News 10-13-2018, 07:31 AM
Replies: 46
Views: 5,239
Posted By grubbat
Avidyne got me

I know how you feel. I purchased a brand new Avidyne 540 and have it in a box unregistered waiting to get it installed in my Comanche by "certified" shop. Avidyne announced a rebate if you wanted to...
Forum: Traditional Aircraft Engines 10-04-2018, 10:25 AM
Replies: 45
Views: 14,516
Posted By grubbat
Alternate air door

I had an alternate air door come off a certified plane and get lodged ahead of fuel servo. It was the spring loaded type connected to a push/pull cable. If i were designing one, I'd probably make it...
Forum: Glass Cockpit 10-04-2018, 10:16 AM
Replies: 17
Views: 3,645
Posted By grubbat
IFLY

Larry,
Ive got an IFLY 740 in the Cub, Comanche, and RV-9. Its a great moving map GPS and so easy to use. The annual subscription is for IFR/VFR is much more affordable than say Garmin and I include...
Forum: RV Ongoing Maintenance Issues 09-24-2018, 05:42 PM
Replies: 24
Views: 3,317
Posted By grubbat
Break-in

If the cylinders weren’t broken in properly, they may never break in no matter how much time they have on them. Assuming valves are good, pull them, crosshatch the cyl, install new rings, then break...
Forum: RV General Discussion/News 09-23-2018, 07:53 AM
Replies: 26
Views: 10,370
Posted By grubbat
Gaskets no more

I eventuality cut off the ends of intake tubes and went with o-rings from Ross Farnham and sealing problems went away. No more gaskets to worry about.
Forum: Traditional Aircraft Engines 09-21-2018, 01:33 PM
Replies: 27
Views: 3,171
Posted By grubbat
Prop driving engine

Lycoming rep advised me to keep manifold pressure at 18" or above to prevent prop from driving engine. I used to think it was around 15" min but not so. Prop driving engine is not good. Constant...
Forum: RV-9/9A 09-20-2018, 06:42 AM
Replies: 8
Views: 1,690
Posted By grubbat
Better

The RV-9 tailwheel model is easier to land than the Citarbria, the Cub, the Taylorcraft, the RV-3, and the Cessna 140. It is a non-event. Van got the balance right.
Forum: RV General Discussion/News 09-19-2018, 01:01 PM
Replies: 7
Views: 1,798
Posted By grubbat
Response

The classes will be 5 days in 2019. Right now, its 4 days of classroom the first week, 3 days of hands on engine work the second week.

Its beautiful country up here and I'm sure there is lots that...
Forum: RV General Discussion/News 09-19-2018, 07:09 AM
Replies: 7
Views: 1,798
Posted By grubbat
2 week class now, 1 week class coming in Feb 2019

The current class is 2 weeks and the instructor is top notch with lots of experience in General Aviation, Experimental, and Lycoming factory. The first week is all classroom with the exception of a...
Forum: RV General Discussion/News 09-16-2018, 10:57 AM
Replies: 54
Views: 5,176
Posted By grubbat
Data needed to help them make a decision about your safety...

I'm not a doctor and don't offer advice proposing to be a doctor but I do know a little bit about government bureaucracy and the need to keep you "safe", so I would suggest that you don't do the...
Forum: Glass Cockpit 09-11-2018, 08:10 PM
Replies: 23
Views: 3,030
Posted By grubbat
Exactly

....and this is EXACTLY what Garmin wants. That being said, the industry needs competition to keep the players investing in innovation which drives prices and features that we so desire. I wouldnít...
Forum: ADS-B 09-11-2018, 06:27 PM
Replies: 21
Views: 3,198
Posted By grubbat
Will add L3 to panel with Avidyne 540

Iím overhauling a Comanche 260 and will be putting the L3 in the panel with a Avidyne 540 later this month. Iíve heard that the L3 is mil spec and the separate screen is a bonus. We will see.

For...
Forum: Fuel Injection Systems 09-09-2018, 11:24 AM
Replies: 117
Views: 21,443
Posted By grubbat
Clint at Vetterman

On my first set, I tig welded the ends and it looked ok but the angle wasn't perfect. So, I found a set of tuned induction tubes for my "forward -facing-angle-valve-converted-parallel-valve lycoming,...
Forum: RV General Discussion/News 09-02-2018, 05:55 AM
Replies: 72
Views: 8,219
Posted By grubbat
Lead free

Lead free racing fuel has been around for a while at Sunoco. Granted itís high cost, but if I recall, it was something like 110 octane. If the stuff would work in AC, then I wonder what the cost...
Forum: RV models of the future (RV-??) 09-01-2018, 08:48 PM
Replies: 443
Views: 107,506
Posted By grubbat
Either or...

Bill,
Iím not so sure it has to be ďeither - orĒ on the occupancy. Just order the size cabin configuration you want. The design could be scalable. My J-3 has a similar wingspan as the super cub....
Forum: ADS-B 08-31-2018, 01:58 PM
Replies: 19
Views: 5,204
Posted By grubbat
What to look forward to

These letters are what we can expect to look forward to when our adsb starts acting up. They shouldn't act up, but then again, seems like we all have issues with avionics at some point. Once it...
Forum: RV-6/6A 08-24-2018, 06:17 AM
Replies: 29
Views: 6,124
Posted By grubbat
Pics

Carl, any pics of the side exhaust?
Craig
Forum: RV models of the future (RV-??) 08-14-2018, 04:21 AM
Replies: 443
Views: 107,506
Posted By grubbat
65hp cub

Doug,
I did the same thing. (Picked up an original 65hp cub this summer).
The cub definitely opened up a part of the flying experience that the RV can't do. The simplistic and low cost flying along...
Forum: Glass Cockpit 07-31-2018, 07:06 PM
Replies: 14
Views: 1,590
Posted By grubbat
Certified lead

Many certified glass panels will also have backup steam airspeed and altimeter gauges. Is it necessary? Maybe not if you only fly VFR and can land your plane without looking at airspeed gauge or that...
Forum: Traditional Aircraft Engines 07-31-2018, 07:19 AM
Replies: 43
Views: 5,455
Posted By grubbat
In Flordia, multi weight Rotella....

In Florida, I'd probably go with Rotella non-synthetic 15w40 and maybe add camguard to make ya feel better. Of course you may want to top it off with AVBlend for icing on the cake.
Forum: Traditional Aircraft Engines 07-25-2018, 02:42 PM
Replies: 1
Views: 677
Posted By grubbat
Your Preferred Bolt Stretch Tool

Just seeking some input for choosing a bolt stretch measuring tool for things like rod bolts and such. What tool/tools do you use or prefer?
Thanks,
Craig
Forum: RV General Discussion/News 07-21-2018, 06:43 AM
Replies: 16
Views: 1,665
Posted By grubbat
Beautiful morning

At 7am, beautiful morning, nice blue sky's south to Pine Mt, I think I'll make a fuel run. All that talk about bad weather was simply crazy. Walk out the door at 7:55 am and to the south, the rich...
Forum: Fuel Injection Systems 06-22-2018, 07:58 PM
Replies: 117
Views: 21,443
Posted By grubbat
Great Product

Installed mine on M1B tubes. Had to chop them then reweld. All I can say is that this is a great product. Engines runs great after being plagued with induction leaks from poor custom made tubes....
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