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Search: Posts Made By: AlanTN
Forum: RV-12 11-01-2017, 07:02 PM
Replies: 9
Views: 3,104
Posted By AlanTN
There are a couple of good photos in the November...

There are a couple of good photos in the November Kitplanes.
Forum: RV-12 10-29-2017, 03:39 PM
Replies: 12
Views: 1,910
Posted By AlanTN
Jim, this is much different than the photos shown...

Jim, this is much different than the photos shown in the November Kitplanes article. Have they changed the prototype?
Forum: RV-12 10-04-2017, 08:22 PM
Replies: 46
Views: 12,196
Posted By AlanTN
Is that really true? So if someone has been away...

Is that really true? So if someone has been away for 50 years they need 50 hours of dual? They would be better off starting over if that is the case.
Forum: RV-12 10-03-2017, 09:29 AM
Replies: 11
Views: 2,375
Posted By AlanTN
Photos?

Any closeup photos of the new design canopy latch?
Forum: RV-12 10-01-2017, 03:06 PM
Replies: 6
Views: 2,200
Posted By AlanTN
Reflections

The reflections in the third photo that was just posted here https://imgur.com/a/pIEUS look like it might be difficult to see the screen on the opposite side. Does anyone know whether an...
Forum: RV-12 09-11-2017, 05:25 PM
Replies: 30
Views: 5,085
Posted By AlanTN
Krea, because there are so many possible...

Krea, because there are so many possible variables, range numbers are generally given based upon the total amount of usable fuel. It can easily be calculated by flying for one hour at the desired...
Forum: RV-12 09-11-2017, 12:32 AM
Replies: 30
Views: 5,085
Posted By AlanTN
I stated above: Figuring 19.8 gallons/4.8 gph =...

I stated above: Figuring 19.8 gallons/4.8 gph = 4.125 hours.... x 117 knots x 1.15 mph/knot = a range of 555 miles. That is about what I would expect, and substantially better than the downgraded...
Forum: RV-12 09-10-2017, 02:31 AM
Replies: 30
Views: 5,085
Posted By AlanTN
Figuring 19.8 gallons/4.8 gph = 4.125 hours.... x...

Figuring 19.8 gallons/4.8 gph = 4.125 hours.... x 117 knots x 1.15 mph/knot = a range of 555 miles. That is about what I would expect, and substantially better than the downgraded numbers (433...
Forum: RV-12 08-21-2017, 07:45 PM
Replies: 4
Views: 1,814
Posted By AlanTN
Scott, I observed the eclipse from start to...

Scott, I observed the eclipse from start to finish with my 8 inch telescope on the ground near the airport outside Hopkinsville. I found the change from crescent to corona and darkness was...
Forum: RV-12 08-06-2017, 06:45 AM
Replies: 39
Views: 5,391
Posted By AlanTN
Thanks, Krea. What I would like to see is their...

Thanks, Krea. What I would like to see is their protocol for the Range Tests. Did they have a reliable way of accurately measuring the fuel consumption for the takeoff, climb, descent and return to...
Forum: RV-12 08-06-2017, 06:27 AM
Replies: 39
Views: 5,391
Posted By AlanTN
Thanks, Krea.

Thanks, Krea.
Forum: RV-12 08-05-2017, 08:10 AM
Replies: 39
Views: 5,391
Posted By AlanTN
Quote: Originally Posted by AlanTN Jim the...

Quote:
Originally Posted by AlanTN
Jim the current POH under the same conditions lists 482 NM and 534 NM
Does your brochure really say MILES?



Jim, I don't have the proof of this, but I have long...
Forum: RV-12 08-04-2017, 09:35 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Jim the current POH under the same conditions...

Jim the current POH under the same conditions lists 482 NM and 534 NM
Does your brochure really say MILES?
Forum: RV-12 08-04-2017, 05:01 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Scott, I have read many of your posts to this...

Scott, I have read many of your posts to this forum over the past several years and thought the vast majority of them were very helpful.

But it is obvious that you must have some kind of mental...
Forum: RV-12 08-04-2017, 02:28 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Scott, I think you are misjudging me. When I...

Scott, I think you are misjudging me.

When I first posted this question in another thread during Oshkosh it was because I had a high regard for the integrity of Van's test data. Although I thought...
Forum: RV-12 08-03-2017, 10:36 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Smile Vic it was my impression from reading the Rotax...

Vic it was my impression from reading the Rotax webpage that anything less than 97% power on the 912iS was economy mode. Also it looks like the throttle detent is not just one position, but has a...
Forum: RV-12 08-03-2017, 08:58 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Scott, I copied and pasted the quote in question...

Scott, I copied and pasted the quote in question from the 3rd paragraph under the general information tab for the RV-12. It has been there for most, if not all of the time that the RV-12 has...
Forum: RV-12 08-03-2017, 04:03 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Scott, I do not mean any disrespect to you or to...

Scott, I do not mean any disrespect to you or to Van's. I am a Mechanical Engineer with some training in aircraft design and experience running a high speed wind test facility. I like Van's. I have...
Forum: RV-12 08-03-2017, 12:26 PM
Replies: 39
Views: 5,391
Posted By AlanTN
Which Range Numbers are Real?

Van's says about the RV-12: "It is what we say it is and does what we say it does, and we have the test data to prove it!"
I have two questions that perhaps Scott can answer:
1. There seems to be a...
Forum: RV-12 07-31-2017, 05:02 PM
Replies: 98
Views: 22,623
Posted By AlanTN
A 25% reduction in fuel consumption equates to...

A 25% reduction in fuel consumption equates to 33% more range, which would be like the original RV-12 having a 26.3 gallon tank without the extra weight. You really can eat your cake and have it too!
Forum: RV-12 07-27-2017, 02:22 PM
Replies: 98
Views: 22,623
Posted By AlanTN
I understand what you are saying, John. There...

I understand what you are saying, John. There apparently are people with fully completed forward fuselages who are selling them and presumably using the tail, rear fuselage, and wings as the basis...
Forum: RV-12 07-27-2017, 09:18 AM
Replies: 98
Views: 22,623
Posted By AlanTN
While you are at Oshkosh, has anybody asked Van...

While you are at Oshkosh, has anybody asked Van whether he plans to upgrade his personal RV-12?
Forum: RV-12 07-23-2017, 11:59 PM
Replies: 25
Views: 4,846
Posted By AlanTN
Tony, here is the Dynon training video I watched:...

Tony, here is the Dynon training video I watched: https://www.youtube.com/watch?v=elGXWzstnFw&index=4&list=PLjU8CSiBHFbZ8SrqM8PZw22dm_HYaSnYJ It demonstrates the function of the 'Expert Control...
Forum: RV-12 07-23-2017, 11:22 PM
Replies: 25
Views: 4,846
Posted By AlanTN
Jesse in the HDX manual on page 8-2 it says the...

Jesse in the HDX manual on page 8-2 it says the following: "Prior to operating in flight, the Autopilot must be fully configured. Refer to the SkyView Classic / SE / HDX System Installation Guide...
Forum: RV-12 07-23-2017, 10:44 PM
Replies: 25
Views: 4,846
Posted By AlanTN
Tony, are you set up to use the 'simplified...

Tony, are you set up to use the 'simplified autopilot controls' or the 'expert autopilot controls?' Apparently it is something you change at the time you set it up. With the HDX the simplified...
Forum: RV-12 07-23-2017, 09:31 PM
Replies: 25
Views: 4,846
Posted By AlanTN
Tony, if a person only had one screen is there a...

Tony, if a person only had one screen is there a way to swap the information displayed in much the same way as if you had two?

Another question. I went through several training videos on the Dynon...
Forum: RV-12 07-23-2017, 04:23 PM
Replies: 25
Views: 4,846
Posted By AlanTN
Keep in mind that with the exception of Scott...

Keep in mind that with the exception of Scott Millhouse who is very happy with two 10" Dynons in his RV-12, the others appear to be flying planes other than the RV-12, and have the liberty of placing...
Forum: RV-12 07-23-2017, 08:08 AM
Replies: 98
Views: 22,623
Posted By AlanTN
FADEC?

Continental has been referring to the IOF-240-B as FADEC ever since it came out. It is used in the Liberty XL-2. As far as I know it has a direct throttle linkage. ...
Forum: RV-12 07-22-2017, 04:31 PM
Replies: 98
Views: 22,623
Posted By AlanTN
Cowl Material?

Tony is the cowl made of aluminum rather than fiberglass? From the look of the vents on the top it appears to be.
Forum: RV-12 07-22-2017, 04:41 AM
Replies: 90
Views: 18,718
Posted By AlanTN
Incorrect Range Numbers???

Please see my earlier post, #38 on page 4 to see why I think these range numbers can't possibly be right
Forum: RV-12 07-21-2017, 04:31 PM
Replies: 15
Views: 4,138
Posted By AlanTN
Why Certified Engines?

I'm confused. Do you not have to have a certified engine and certified IFR equipment to fly IFR? If not, what is the need for a certified engine?
Forum: RV-12 07-19-2017, 01:06 PM
Replies: 90
Views: 18,718
Posted By AlanTN
RV-12 used market values

Azjulian, what you just said tends to agree with Cactuspilot's statement that values of used RV-12's may decline. If others, decide to sell their existing 12 in order to build a new RV-12iS, that...
Forum: RV-12 07-19-2017, 10:25 AM
Replies: 90
Views: 18,718
Posted By AlanTN
Fuel Tank Safety

Scott, I agree with your premise that fuel carried in the wings is just as vulnerable, if not more so. With the new fuel tank design, have improvements been made to improve its strength? And will a...
Forum: RV-12 07-18-2017, 09:49 PM
Replies: 90
Views: 18,718
Posted By AlanTN
Range discrepancy?

There seems to be a significant discrepancy between the range numbers previously posted for the 912ULS (7500 ft, 5500 rpm = 555 miles, and 7500 ft, 5000 rpm = 614 miles)...
Forum: RV-12 01-10-2016, 11:34 AM
Replies: 37
Views: 8,934
Posted By AlanTN
Change or Option?

So is this going to be a change in the kit or just an additional option?
Forum: RV-12 10-30-2015, 01:49 PM
Replies: 13
Views: 3,089
Posted By AlanTN
Getting rid of gasoline smell

There are machines that are referred to as ionizers or ozone generators that will react with and destroy most odors. They use them in to get rid of mildew, formaldehyde and cigarette smells. I have...
Forum: RV-12 04-09-2014, 09:15 PM
Replies: 7
Views: 2,284
Posted By AlanTN
Great website

Great website, Bob. I enjoyed the pictures and the read
Forum: RV-12 09-04-2013, 04:10 PM
Replies: 15
Views: 2,478
Posted By AlanTN
Mt Vernon?

Is anyone going to the Midwest Air Show in Mt Vernon this week?
Forum: RV-12 09-02-2013, 09:27 PM
Replies: 190
Views: 82,506
Posted By AlanTN
Annoying AoA Sound

For those who are annoyed by AoA warning sound, I wonder how it is being handled in the Icon A5. The AoA is a huge part of their design.
Forum: RV-12 01-01-2013, 01:03 PM
Replies: 51
Views: 12,246
Posted By AlanTN
Max Range / Fuel Economy data

I think I found the answer to my original question about the fuel burn and conditions for the 614 maximum range stated by Van's for the RV-12. Page 5-6 of the POH provides the following...
Forum: RV-12 12-27-2012, 10:15 PM
Replies: 296
Views: 63,767
Posted By AlanTN
Is the crazing problem only cosmetic or does it...

Is the crazing problem only cosmetic or does it actually destroy the window?
Forum: RV-12 12-15-2012, 09:12 AM
Replies: 39
Views: 15,422
Posted By AlanTN
Beautiful airplane, beautiful picture. Where was...

Beautiful airplane, beautiful picture. Where was it taken, Joe?
Forum: RV-12 10-27-2012, 06:34 PM
Replies: 51
Views: 12,246
Posted By AlanTN
K factor change?

Larry, I know it is an old thread, but I was rereading it and I am curious. When your Dynon was recalibrated, did it change the fuel flow numbers you were seeing, namely 3.2 gph at 97 mph?

If so,...
Forum: RV-12 07-06-2012, 11:01 PM
Replies: 14
Views: 5,015
Posted By AlanTN
Congratulations, John. I am sure you have gotten...

Congratulations, John. I am sure you have gotten a lot of enjoyment out of that plane.
Forum: RV-12 02-01-2012, 05:49 PM
Replies: 4
Views: 2,231
Posted By AlanTN
Nice picture, John. Northeast of you?

Nice picture, John. Northeast of you?
Forum: RV-12 01-02-2012, 11:47 AM
Replies: 30
Views: 7,592
Posted By AlanTN
Perhaps you meant to say 180 hp?

Perhaps you meant to say 180 hp?
Forum: RV-12 12-31-2011, 08:27 PM
Replies: 21
Views: 5,054
Posted By AlanTN
John, people have died using ropes stored where...

John, people have died using ropes stored where chemical vapors were in the area. It is hard to know the strength of a rope unless it is tested. In any case the strap manufacturer would strongly...
Forum: RV-12 12-31-2011, 07:59 PM
Replies: 21
Views: 5,054
Posted By AlanTN
John, are you sure that the paint won't weaken...

John, are you sure that the paint won't weaken the fibers in the strap. There is no way I would use a rope with paint on it for climbing!
Forum: RV Friends Who Have Passed On 12-20-2011, 09:45 AM
Replies: 12
Views: 6,031
Posted By AlanTN
Sad. He was posting regularly. Does anybody...

Sad. He was posting regularly. Does anybody know if he was ill?
Forum: Safety 12-14-2011, 05:37 PM
Replies: 52
Views: 11,768
Posted By AlanTN
It is easy to rationalize that you can improve...

It is easy to rationalize that you can improve the numbers. I believe that mile for mile small planes have seven times the fatalities of cars, as Michael said. It is tempting to say that by being...
Forum: Safety 12-14-2011, 05:01 PM
Replies: 52
Views: 11,768
Posted By AlanTN
For those who are interested in improving their...

For those who are interested in improving their odds of flying safely, learning where other people went wrong can sometimes bring to our attention things that we were not consciously aware of. For...
Forum: RV-12 12-08-2011, 05:39 PM
Replies: 96
Views: 20,083
Posted By AlanTN
Joe, how much elongation did you use to measure...

Joe, how much elongation did you use to measure the force in your springs? Someone else would need to know this detail, I suspect.
Forum: RV-12 12-08-2011, 08:53 AM
Replies: 96
Views: 20,083
Posted By AlanTN
Spring strength?

John, I think it would be interesting to know how strong these new springs are compared with the originals and the ones Joe has ordered.

"I spent lots of time reading spring catalogs to find the one...
Forum: RV-12 11-28-2011, 01:40 PM
Replies: 25
Views: 6,223
Posted By AlanTN
Breathtaking scenery, but a little too close for...

Breathtaking scenery, but a little too close for my comfort!
Forum: RV-12 11-26-2011, 07:56 AM
Replies: 56
Views: 13,154
Posted By AlanTN
Pilot Error!

And the Titanic went down because of pilot error, not faulty design! Knowing the ice field was there they should have diverted south. They should also have reduced speed. They did neither because...
Forum: RV-12 11-23-2011, 08:42 PM
Replies: 136
Views: 38,937
Posted By AlanTN
Dimensions

Larry Geiger, I believe, said not far back in this thread that the dimensions are 23"x17"x12" and it is not a perfect rectangle.
Forum: RV-12 11-21-2011, 12:11 PM
Replies: 111
Views: 27,588
Posted By AlanTN
G3X much smaller

Scaling off the photos, the G3X appears to have a screen diagonal of 7.3 inches. That would give you about half the screen area of the Skyview. I vote for Skyview.

I don't think Van's is going to...
Forum: RV-12 11-16-2011, 01:21 PM
Replies: 51
Views: 12,246
Posted By AlanTN
Here in Tennessee we can also got non-ethanol...

Here in Tennessee we can also got non-ethanol gasoline. One source I have says that E10 has 97% of the energy that gasoline has. So that would only account for about 0.1 gallon per hour difference....
Forum: RV-12 11-15-2011, 09:21 PM
Replies: 51
Views: 12,246
Posted By AlanTN
Lower nose --- glide farther!

"When flying slower than L/Dmax, raising the nose will eventually lower the aircraft."

Dave's last statement needs to be burned into the brain of every pilot. In an approach at below the best glide...
Forum: RV-12 11-14-2011, 10:00 PM
Replies: 51
Views: 12,246
Posted By AlanTN
Thanks, Larry. Do you have any idea what your...

Thanks, Larry. Do you have any idea what your RPM was? It is interesting that Peter used 3.8 gph and you only used 3.2 gph. It must be those rivets that you filled in! :-)
Forum: RV-12 11-14-2011, 10:14 AM
Replies: 51
Views: 12,246
Posted By AlanTN
I agree that Vy and max L/D are not necessarily...

I agree that Vy and max L/D are not necessarily the same. 'Stick and Rudder' page 364 paragraph 1 makes the statement, "Of all the working speeds of the airplane this is the one whose exact location...
Forum: RV-12 11-13-2011, 10:10 PM
Replies: 51
Views: 12,246
Posted By AlanTN
Thanks, Peter. Your 3.8 gph agrees closely with...

Thanks, Peter. Your 3.8 gph agrees closely with Dave's calculated results.

Dave using the same calculations and working backwards for cruise at 5500 RPM I arrive at 99 knots for the IAS and 4.7...
Showing results 1 to 62 of 75

 
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