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Search: Posts Made By: Larry DeCamp
Forum: Electronic Ignition Systems Yesterday, 03:52 PM
Replies: 5
Views: 250
Posted By Larry DeCamp
Useable juice ! Good point .

Point taken. The true value is how much energy is available before “not enough”. With that said , the less complicated battery with “tested” capacity is the true value. Thanks.
Forum: Electronic Ignition Systems Yesterday, 09:41 AM
Replies: 5
Views: 250
Posted By Larry DeCamp
Thanks John

I share your logic, I'm just open to other perspectives.

WRT two battery chemistries, I had a post on this way back. The consensus was:
* 14.2 volts is just that. The batteries don't care.
* A 12.8V...
Forum: Electronic Ignition Systems Yesterday, 09:15 AM
Replies: 5
Views: 250
Posted By Larry DeCamp
Earthx vs AGM for backup battery ?

A 5AH Earthx "backup" battery was recently linked here on VAF. LiFe with a brain seems like overkill for a simple voltage supply.

Earthx has a relatively flat voltage decay while AGM has a more...
Forum: Electrical Systems 11-21-2022, 05:38 AM
Replies: 13
Views: 1,459
Posted By Larry DeCamp
Backup battery complexity.

I am an Earthx user for primary battery. I will use a backup battery to assure power for electronic ignition ( not emags ). Why would I use an expensive/ more complex design than AGM to provide 7...
Forum: RV General Discussion/News 11-15-2022, 06:08 AM
Replies: 25
Views: 2,940
Posted By Larry DeCamp
Saw blade question ?

Does anyone have a toothed blade recommendation for plex cutting by hand ?
What have you cut to confirm functionality?
Example :
Thickness
Teeth per inch
Depth front to back
Source for purchase

I...
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-13-2022, 08:07 AM
Replies: 2
Views: 193
Posted By Larry DeCamp
Old Style

Define old style
Forum: Primers 11-03-2022, 06:53 AM
Replies: 6
Views: 624
Posted By Larry DeCamp
Clarification

The base/clear instructions say the wash/etch primer SHALL BE 2K primed/sealed under the base coat. In the process of assuring this 2K sufacer is ready for base coat, it recommended to wet sand with...
Forum: Primers 11-02-2022, 06:14 AM
Replies: 6
Views: 624
Posted By Larry DeCamp
A case for epoxy primer

I have been agonizing through prep for solvent borne base/clear paint. The problem is sanding over imperfect flush rivets and imperfect dimple perimeters . Sanding will strike through the primer back...
Forum: RV Building Tips/Techniques 11-01-2022, 05:49 AM
Replies: 38
Views: 10,171
Posted By Larry DeCamp
Define aileron snatch

I replaced two RV3 ailerons that were smashed too much. The new ailerons I built ended up with a TE radius about 1/8Ē when skins were flat and tangential to the trailing edge. The airplane was...
Forum: Painting your RV 10-29-2022, 08:38 AM
Replies: 30
Views: 2,916
Posted By Larry DeCamp
Thanks LR172

This 2-24hr window referenced is at the core of my question.
1- Does all the acid rinse water dry from crevice's and lap joints in 2hrs, probably not.
2- Wash/Etch primers over scuffed aluminum are...
Forum: Painting your RV 10-29-2022, 05:47 AM
Replies: 30
Views: 2,916
Posted By Larry DeCamp
Bandera question

I apologize for the thread drift but your comments raised this question for me. The issue can affect paint system selection, cost and results.

I have done the scothbright/acid etch / rinse process...
Forum: Painting your RV 10-28-2022, 06:36 PM
Replies: 30
Views: 2,916
Posted By Larry DeCamp
Technical clarification

There is reference to epoxy primer. It is is my understanding that this should/be preceded by some form of abrasive acid etch.

By contrast, other systems suggest an abrasive scrub followed by an...
Forum: RV General Discussion/News 10-27-2022, 06:52 AM
Replies: 15
Views: 1,131
Posted By Larry DeCamp
How to shape uhmw

UHMW is ultra high molecular weight POLYETHYLENE plastic. It is used as rubbing wear resistant surface in mining conveyor chutes and bottling lines for example. It is designed to be slippery,resist...
Forum: RV Building Tips/Techniques 10-15-2022, 07:44 AM
Replies: 3
Views: 1,006
Posted By Larry DeCamp
Dan Horton paint question

Dan, I have been studying base/clear painting videos cause I have no experience with base/clear, just 2k Urethanes.

They make a point that silvers ( fine metallics ) must be carefully prepared with...
Forum: RV Photo/Video URLs 09-26-2022, 06:48 AM
Replies: 51
Views: 6,020
Posted By Larry DeCamp
Abwaldai comment observation

For us guys not working anymore or raising kids, it is not conspicuous consumption to spend your money. I have never seen a brinks truck in a funeral procession ! It has no value where you are going.
Forum: RV-14 09-25-2022, 08:42 PM
Replies: 7
Views: 916
Posted By Larry DeCamp
Adjustments ?

With an intelligent device like G3x, there is no adjustment. You program the input value corresponding to gallons. I cannot speak to how a voltage driven readout would be handled.

For my RV4, the...
Forum: RV-14 09-24-2022, 06:02 AM
Replies: 7
Views: 916
Posted By Larry DeCamp
CEIS simplicity

Because of the extreme difficulty of access to the fuel senders between the tank and the fuse, the NON CONTACT nature of the CEIS device suggests trouble free reliability for a long time relative to...
Forum: RV-14 09-23-2022, 08:17 PM
Replies: 7
Views: 916
Posted By Larry DeCamp
Wayne, you said it.

One in each tank that's accurate when tanks are approaching low, plus fuel consumed from FF device and you are in control.

I installed low level sensors ( electronic eyes ) to enunciate calibrated...
Forum: Painting your RV 09-22-2022, 07:52 PM
Replies: 16
Views: 1,329
Posted By Larry DeCamp
Specifically aluminum skins

Good point regarding fiberglass vs aluminum suggestions. West 105 sticks annoying well to aluminum when you don't want it to. Since it does sometimes “Pop off”, I don't get confidence in it is a “go...
Forum: RV Building Tips/Techniques 09-22-2022, 06:25 AM
Replies: 4
Views: 442
Posted By Larry DeCamp
If you do convert to 1/4 turn.

One challenge to be careful of is the location of flange that holds the female component. Getting exactly right for good height match up when tightend. Not pushing Skybolt at all, just a reminder...
Forum: RV-7/7A 09-13-2022, 06:39 AM
Replies: 10
Views: 1,169
Posted By Larry DeCamp
Hex rod improvement ?

My 2009 3B kit had hex rods. My 1999 RV4 kit has round rods. What is the shortcoming of of the round rods if you follow air speed suggestions for flap deployment ? I can easily replace them, just...
Forum: RV General Discussion/News 09-12-2022, 06:56 AM
Replies: 44
Views: 4,542
Posted By Larry DeCamp
Mark valve stem

The laser idea is cool. I just drilled a piece of aluminum with two small holes . One was for the bolt in gear leg threaded cap, and the other was for a center punch or marker corresponding to the...
Forum: RV General Discussion/News 09-11-2022, 06:01 AM
Replies: 44
Views: 4,542
Posted By Larry DeCamp
Access hole size

I have small holes in the fairing that will pass a 10mm socket to remove the Michelin inner tube stem cap. The hole is so small I donít cover it. I could turn custom plastic plugs like Scott...
Forum: Traditional Aircraft Engines 08-30-2022, 07:16 AM
Replies: 4
Views: 1,012
Posted By Larry DeCamp
Superior 360 /champion filter/B&C 410 pad alternator

The filter barely clears the alternator but it does. 3.320 ish OD. Canít post pics. Send email for pic if desired.
Forum: RV-8/8A 08-28-2022, 07:10 AM
Replies: 13
Views: 1,564
Posted By Larry DeCamp
Carbon/glass lamination ?

Several reference above about combining glass and carbon. Long ago The Horton School of composites made the point the thermal expansion rates are significantly different.
So, is it OK to combine...
Forum: Tools 08-14-2022, 07:18 PM
Replies: 6
Views: 746
Posted By Larry DeCamp
Look up Lower Explosion Limit

I have used CONTINUOS compressed air flow in a car tank to to fuse a punctured plastic tank. There are no doubt experts here who can comment on this simple option.
Forum: RV-3 08-13-2022, 11:39 AM
Replies: 21
Views: 1,971
Posted By Larry DeCamp
Melís point well taken.

Wing mods are no big deal when building.
My point was there have been a lot of fun hours flown with standard category aircraft. I suspect a lot of RVís become poorly conceived (engine and...
Forum: RV-3 08-13-2022, 06:05 AM
Replies: 21
Views: 1,971
Posted By Larry DeCamp
Why are wing mods a big concern

Should we ground all Cessnas with standard category 4.4g wings ? What am I missing ?
Forum: RV-3 08-11-2022, 01:19 PM
Replies: 21
Views: 1,971
Posted By Larry DeCamp
What is your mission ?

A 160HP 3B is a pretty hot toy. By contrast, an 0200 3A would be light and nimble for safe fun flying without CN1 and CN-2 mods. Wing tanks are not required for simple short trip fun flying. Space...
Forum: RV Building Tips/Techniques 08-08-2022, 07:50 PM
Replies: 30
Views: 2,169
Posted By Larry DeCamp
Cowl to spinner gap

Donít forget the Dave Anders approach to capturing lower cowl airflow with a felt seal on the crank extension. This gives some flexibility to the spinner/cowl gap options. Your sense of aesthetics...
Forum: RV Building Tips/Techniques 08-08-2022, 05:24 AM
Replies: 30
Views: 2,169
Posted By Larry DeCamp
Sag allowance ?

The washer makes a nice reference and aesthetically pleasing starting point. The wild card here is how much sag to anticipate and accommodate. Some folks say they get none and others inquire about...
Forum: RV Building Tips/Techniques 08-07-2022, 08:47 PM
Replies: 30
Views: 2,169
Posted By Larry DeCamp
Rocketdoc: an option to consider

You can trim the lower rear of the cowl to drop the front and open the gap to the spinner. This will likely eliminate a lot of custom micro/flox work and preserve the molded periphery of the spinner...
Forum: RV Ongoing Maintenance Issues 08-05-2022, 07:35 PM
Replies: 4
Views: 863
Posted By Larry DeCamp
P thread drift,

I have wondered why the heat or fresh air comes into an RV cabin. Sure, there are small leaks at numerous places like flaps, rudder cables and empennage. But can these account for the significant...
Forum: The RV Grin 07-23-2022, 02:19 PM
Replies: 1
Views: 1,036
Posted By Larry DeCamp
4 vs 8

Is an RV 8 less sensitive to passenger weight than an RV4 ?
Forum: RV Building Tips/Techniques 07-17-2022, 09:11 AM
Replies: 8
Views: 1,154
Posted By Larry DeCamp
Vinyl will bond to epoxy and soften in solvents

Electrical tape and anything vinyl can work and can fail depending on chemistry .
Polyethylene based tapes are certain to release and also protect adhesive and substrate under it.
There are...
Forum: RV-4 07-13-2022, 07:40 PM
Replies: 9
Views: 1,446
Posted By Larry DeCamp
Stress relief

The basic bubble was overblown where it joined the rear seat bulkhead shape. This is a natural outcome of the drawing process. So I made a wooden form to match the aluminum tailcone at the rear seat...
Forum: Painting your RV 07-11-2022, 06:16 AM
Replies: 23
Views: 3,413
Posted By Larry DeCamp
Water borne or solvent based ?

This decision will take your research down a fork in the road to material selection.
Forum: RV-4 07-10-2022, 06:23 AM
Replies: 9
Views: 1,446
Posted By Larry DeCamp
+ 1 for Jeff at Airplane plastics

He even did a stress relief for me on a wood form I made to eliminate any bending.

Suggestion: For your tailcone skin, think about using an epoxy putty to fill the gap between formers and skin...
Forum: RV General Discussion/News 07-08-2022, 08:59 AM
Replies: 31
Views: 3,611
Posted By Larry DeCamp
Skybolt vs screws vs hinge

My 3 had hinge on sides and skybolt on firewall.
Hinges are a PITA and Rivets pop the filler over them. You could drill holes in the hinge flange and epoxy a glass tape over it to create an epoxy...
Forum: RV Building Tips/Techniques 07-05-2022, 07:36 PM
Replies: 12
Views: 1,914
Posted By Larry DeCamp
Etch primer ?

Many automotive primers are claimed to be corrosion inhibitors. Stop by your auto refinish outlet and discuss a solution.
Forum: RV-3 07-02-2022, 11:24 AM
Replies: 40
Views: 5,891
Posted By Larry DeCamp
An afterthought

Using the engine cylinder head bolt preload principal, you could stiffen the rod leg with the backing bar to resist the maxlmum deformation expected ( reasonably practical ) and it should act like...
Forum: RV-3 07-02-2022, 09:36 AM
Replies: 40
Views: 5,891
Posted By Larry DeCamp
Antisplat on the right track.

The video for the nose wheel gets to the heart of the matter. The steel clamp on the MIDDLE of the of the steel rod is the critical ingredient . This is the end game for the Adel Clamp uncertainties....
Forum: RV Building Tips/Techniques 07-02-2022, 05:59 AM
Replies: 5
Views: 936
Posted By Larry DeCamp
3M 2216

John,
I did the green loctite thing with initial success but had some leakage after a while. I use JB weld for cosmetic filler but I question its ability to adhere and penetrate the tiny source of...
Forum: RV-3 07-01-2022, 02:59 PM
Replies: 40
Views: 5,891
Posted By Larry DeCamp
Antisplat clamp ?

Ralph~,
`Can you describe the clamp concept in case Antisplat doesnít chime in. It is my opinion you can optimize bending modulus and section modulus to perfection, but loose it all with minuscule...
Forum: RV-3 06-30-2022, 07:27 PM
Replies: 40
Views: 5,891
Posted By Larry DeCamp
Why not steel ?

Great to hear AL works. I expect a modulus vs. weight comparison with steel could be revealing. How would holes in the flat bar enhance the outcome ? Great work David, thanks. Any energy left to...
Forum: RV-4 06-30-2022, 06:01 AM
Replies: 3
Views: 589
Posted By Larry DeCamp
What is correct oil level to calibrate dipstick ?

I had to shorten the fill tube to clear the James cowl with my Superior -360 engine. I need to reposition the dipstick ( with the tail down of course).

I have concluded that the oil measured in the...
Forum: Electrical Systems 06-24-2022, 11:19 AM
Replies: 21
Views: 3,286
Posted By Larry DeCamp
Draker suggestionm

Any local automotive electric shop has dies and tools for a secure job. They do eveything from bulldozers to fire trucks where where reliability counts.
Forum: RV Building Tips/Techniques 06-21-2022, 07:42 PM
Replies: 3
Views: 430
Posted By Larry DeCamp
Heads up on Skybolt fasteners

I love them , BUT:
If you use retainer rings, it is hard to get the cowl on with the studs sticking out trying to scratch everything.
The arc of the oil door probably wont allow the studs in the...
Forum: Primers 06-18-2022, 05:50 PM
Replies: 17
Views: 2,399
Posted By Larry DeCamp
Other options

nason, Spies Hieker,stewart systems.
Forum: RV-4 06-16-2022, 05:53 AM
Replies: 12
Views: 1,665
Posted By Larry DeCamp
RV 4 specific obseration

I had planned to mount a steel plate behind the spar on the two top, inner most 3/8 bolts through the heavy steel doubler supplied buy Van. This may not be rear enough for you as the belt manufacture...
Forum: RV Ongoing Maintenance Issues 06-13-2022, 05:29 AM
Replies: 24
Views: 3,495
Posted By Larry DeCamp
What about this Steve ?

Make an elbow form out of foam sealed with West 105. Wrap it with Dan’s Ultra Black impregnated glass tape as thick as you like. Pour in the Acetone and install ��
Forum: RV Building Tips/Techniques 06-12-2022, 11:33 AM
Replies: 20
Views: 2,230
Posted By Larry DeCamp
Just athought regarding Adel clamps

Make your own for wiring out of .032 aluminum sheared to width. Slip pvc or shrink wrap over it and bend to requirements. About any style tinnerman/nut/thread should hold wires ?
Forum: RV General Discussion/News 06-08-2022, 05:09 AM
Replies: 5
Views: 1,268
Posted By Larry DeCamp
Angle iron legs

With the engine and mount off, just make two legs that bolt on the fuse with mount bolts at the firewall. Get fancy and put some HF wheels on the end of the legs. X brace them for “suspenders”.
Forum: RV General Discussion/News 06-02-2022, 01:29 PM
Replies: 22
Wax
Views: 3,591
Posted By Larry DeCamp
Dan et.al.

how do you avoid a dry wax ring in the low spots around the flush rivet heads ?
Forum: RV-3 06-01-2022, 08:01 PM
Replies: 17
Views: 1,980
Posted By Larry DeCamp
To Justinuzza

I sent a PM but maybe you didnít get it.
Thin trailing edges, even if straight cause more stick force.
You will get lots of advice to Bump the trailing edge to increase radius. This will logically...
Forum: Traditional Aircraft Engines 05-28-2022, 06:07 AM
Replies: 33
Views: 4,031
Posted By Larry DeCamp
Regarding auto plug inserts

Some potentially useful observations:

Copper on the the BRONZE threads of the insert and the larger diameter encourage the insert to stay in the engine more often than not.

Graphite on the smaller...
Forum: Traditional Aircraft Engines 05-27-2022, 12:55 PM
Replies: 33
Views: 4,031
Posted By Larry DeCamp
ATS2612 from Spruce

So far no mention of ATS2612 graphite? Copper does get really viscous and feels like your pulling threads removing the plug. This graphite stuff is very thin and plugs do come out easily. Heat...
Forum: Painting your RV 05-18-2022, 05:57 AM
Replies: 12
Views: 2,018
Posted By Larry DeCamp
Smile Adhesion ?

Sometimes west 105 micro can be popped off when cleaning up where you donít want it. I am at this point in paint prep as discussed above.

You are saying purposful sanding is good enough for the...
Forum: RV Building Tips/Techniques 04-25-2022, 05:18 AM
Replies: 14
Views: 1,679
Posted By Larry DeCamp
Good wear resistance

I have high wear areas coated by my gunsmith. Examples are instrument panel, throttle quadrant aluminum, floor panels you step on , etc.

Fantastic results and he uses the oven bake process. Did this...
Forum: RV Building Tips/Techniques 04-22-2022, 05:47 PM
Replies: 6
Views: 750
Posted By Larry DeCamp
Polyethylene

Tape or film, your call. Packing tape is terrible to remove when needed. Big box home center has it all.
Forum: Glass Cockpit 04-20-2022, 08:12 PM
Replies: 11
Views: 1,102
Posted By Larry DeCamp
Touch screen life span ?

No bias here about touch screen convenience. I have had Ifly 720,740 and g3x.
Cell phones, tablets and my Ifly 720 screen die. So does any expert here have a comment on touch life expectancy vs non...
Forum: Tools 04-19-2022, 05:57 AM
Replies: 25
Views: 3,037
Posted By Larry DeCamp
Boeshield type alternative

Grizzley Tools sell a can of jelly from Slip It Industries for this purpose, table saws ,planers etc. smears on easy and dries. Not a silicone, I think its more Boeshild, paraffin based.
Forum: RV General Discussion/News 04-14-2022, 07:54 PM
Replies: 5
Views: 569
Posted By Larry DeCamp
Call Rocket Bob

Call Rocket Bob
Forum: Safety 04-11-2022, 06:26 AM
Replies: 7
Views: 1,159
Posted By Larry DeCamp
Fuel tank vents

The plans suggest a tube up the firewall and down through the floor.

The ďRocketĒ vent is two coils at the root rib and out the floor.

There is testimony here that pressure under the wing will feed...
Showing results 1 to 64 of 500

 
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