RE: Heli-coil
I have done a few Saito engines(and other 4 stokes) with stripped glow plug holes, you must be very careful not to damage the valve seats when drilling and tapping for a repair coil. If you are not confident you can do it without problems I would send it to someone, as others have mentioned. For example, I repared a pair of stripped Saito 82s for a guy, I had to change the angle of the glow plugs slightly when I prepped them for the coil repair to avoid getting into the valve seats. I did the work on a small milling machine, which was considerably more accurate than a drill press. I have also put an insert into a blind hole so I didn't have to drill all the way through into the combustion chamber. This also involved a mill, with and an end cutting end mill.
Posted on: 2/16/2012 11:21 AM by Author "HunkaJunk" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10961776

RE: New (to me) internet myth
[quote]ORIGINAL: Antique A customer told me today he heard that the A stamped on top of a Sachs piston means top of the line, a D on top means industrial grade...What a CROCK...Maybe we should start a thread with all these internet MYTHS listed for newbies..We ALL know the old timers don't perpetuate these things, don't we ? [8|][;)] [/quote] I didn't read the whole thread, but you are correct it is a CROCK. "A" or other letter stamped on a part generally means revision A,B...or whatever revision they are on. All of the car manufacturers do this that I am aware of, any number of other industries do this as well, including the printing press manufacturer I used to work for. It is an extremely common SOP. Whatever the Letter scheme denotes on a Sachs piston, I don't know but I am sure it denotes differences in the parts that you can't just look at and see easily.
Posted on: 2/16/2012 10:12 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10961695

RE: Which oil do you use?
I personally use Amsoil, Interceptor, Dominator and Saber. I've been using Amsoil 2 stroke oils for a couple decades now, in numerous applications.
Posted on: 2/3/2012 8:11 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10941806

RE: maybe stupid question but
I'm not at all convinced that the benefits of fuel injection would outweigh the added cost and complexity for our application. We won't get any noticible increase in power from it. The engine temperature may not be stable enough to reliably use fuel injection also.
Posted on: 1/13/2012 7:40 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10906669

RE: Gas RC was a mistake !!!!
If it doesn't have a rudder, I won't even fly it. [quote]ORIGINAL: YearningtoFly Trained on the sim extensively. Feel confident. Started with parkflyers. No issues. Decided to get a gas trainer, look at clubs and an instructor. Instructor tells me...no rudder.....you wont even touch the rudder when you fly with me. Most guys and instructors dont use the rudder out here. Want to buy a gas trainer and radio ? Park is where it is at for me. [/quote]
Posted on: 1/7/2012 8:51 PM by Author "HunkaJunk" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=10897215

RE: Value of opinions on RCU
I'll read most anyones opinion, but opinions are like belly buttons...everybody has one, this also includes 'expert opinions'. I take them all with a grain of salt, because in the end it is me alone that is responsible fo my own stuff.
Posted on: 1/3/2012 5:31 PM by Author "HunkaJunk" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=10890314

RE: Do You Still Range Check Your Radios??
Yes, I perform a standard range check before the first flight of the day on whatever models I have brought to the field. I follow the JR 2.4 GHZ range check instructions. On a new setup I will take the range check to it's limit with the range check button depressed, which is always considerably farther than the range check instructions, the distance is always far enough that I need someone to monitor the model and we communicate with hand signals.
Posted on: 1/3/2012 5:18 PM by Author "HunkaJunk" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=10890292

RE: Ok , Ive read the Sticky , Still got a Question .....
I take the springs on my gassers completely off, none of the carburetors I run need the spring to center the butterfly, there is generally a c clip on one side and a screw and spacer under the throttle lever that centers it. I can kill the engine from the TX without the use of the throttle switch so a throttle servo failure would not be an issue.
Posted on: 12/18/2011 4:57 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10865594

RE: Don't Order Spark Plugs From Sears
Sears parts are generally quite expensive, The good thing is you can get parts for some of their older stuff that has been out of production for a while. I had to buy a drive set for my old Craftsman disc/belt sander combo which consisted of 2 pulleys and a Gilmore belt, it cost me about $55, but I got my U.S.A made sander usable again. I probably could have bought a new Chinese sander for that...OH well.
Posted on: 12/15/2011 8:55 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10861788

RE: Have You Flown an RC Model Under the Influence of Alcohol?
No, I don't drink any alcohol or take any pain medication, I even had surgery and had to have a pacemaker installed and refused all prescriptions for narcotic pain medication. Granted I was in some pain, but narcotic pain killers don't kill pain, they just get you stoned so hopefully you don't care if you're in pain. In my case they just make feel weird and I'm still in pain.
Posted on: 12/15/2011 8:41 PM by Author "HunkaJunk" in the forum "AMA Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=10861777

RE: Tired Old Man and Jody
[quote]ORIGINAL: cuwaert I don't know what happened but it seems people left the forum for some reason. I 've seen TOM contributing in this forum quite a lot and I'm sure JODY did that too. Well it's a forum, one says, one disagrees and some get mad for some reason and if it get's to you it's better indeed to stop it but I don't know what took them over the edge. The rather rude assaults sometimes to be witnessed is something to be expected in any forum or chat because there is no eye to eye contact that takes away some natural restrictions. It's particular disturbing when it's nothing to do with the actual point being discussed. Aircraft RC is, by it's very nature,a very technical orientated hobby and quite unforgiving for all kinds of mistakes so we all want to get it wright and that makes it irritating if we think someone is telling stories and hence the irritation is in good faith and so is the chouting, it's by far not always because we're smartasses. Nobody has the monopoly of the truth. [/quote] I don't know exactly either, but I will admit my last dealings with them was me becoming quite irritated with them and I went off. Although I didn't mention any names in my post I became quite irritated over them essentially calling the OP stupid and lazy for not using the search function. my post is here http://www.rcuniverse.com/forum/fb.asp?m=10783458&key= I saw it as "them" abusing the OP for something that was not a violation and I told "them" off
Posted on: 12/15/2011 9:52 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10860877

RE: How big of a generator do I need ?
[quote]ORIGINAL: OliverJacob http://www.survivalistboards.com/showthread.php?t=74036 if you own a scope, you can find out yourself when running under different loads....you'd be surprised how your wave will look. Some electronics are 'forgiving' and handle these impuritys, some don't. [/quote] Yes I own an oscilliscope, I checked my 220V backup generator when I bought it a few years ago, the sine wave is quite good. I live in a neighborhood that has old utility systems in it, power outages are frequent, I am comfortable running any electronics I own off of it, (I plug it right into the main box when the need arises via a transfer switch). My little generator, (HF 800w) I haven't checked the wave but it is rock solid at 60HZ, about all I use it for is running a 25 amp DC power supply and some outdoor work lighting sometimes.
Posted on: 12/15/2011 9:12 AM by Author "HunkaJunk" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10860823

RE: How big of a generator do I need ?
[quote]ORIGINAL: OliverJacob I used one of the cheap 2 stroke generators, it hat 1000 Watts and worked ok. But I would never run a computer or expensive charger to this. Even if it puts a out a real nice sinus wave (which it doesn't) then you are still dealing with power spikes when the load changes. The carb got gummed up fast, was hard to start and the engine seized after a year of no use. Used good quality 2 stroke oil, 1:25. My opinion - get a good size car or truck battery, charge it at home and you'll have enough power to fly all day. Yes, it's heavy and bulky, but so is the generator. [/quote] How is it that an actual wound generator dosen't put out a true sine wave? wound improperly or something?
Posted on: 12/14/2011 4:47 PM by Author "HunkaJunk" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10859784

RE: How big of a generator do I need ?
[quote]ORIGINAL: OhD Randy, be careful of 2 stroke generators as they may not have the frequency stability required for our power supply/charger set up. I'd make sure someone would verify that the generator you select will work with your power supply and charger. Jim O [/quote] On the contrary, 2 stroke generators have exceptional governor controlled output (60 hz).Tthey generally have a carburetor with a float and bowl and a mechanical governor controlling the throttle, and the 2 strokes accelerate very fast and stable when more load is added. The biggest problem with two stroke generators I have seen is many of them say they are to be used with 50:1 or 60:1 two stroke mix. IMHO this is not a suitable mix for a 2 stroke engine that runs under constant heavy load (generator). Here is some inside information, the little Harbor Freight 800 watt 2 stroke gererator is a pretty descent little generator for the money, quite a few of them come back, IMO mostly due to the 50:1 recommended mix ratio, if you only use it lightly it will be fine, but put the full 800 watts on it, and even the very best of 2 stroke oils is a questionable mix at 50:1, up the mix to 32:1 and it will generally run for a long long time at full load (yes this is from personal experience).
Posted on: 12/14/2011 2:47 PM by Author "HunkaJunk" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10859593

RE: In need of some help!! thank you
Unless you need the high octane gas, you are just throwing money away. The octane rating is a number that correlates the the ease of ignition of the air/fuel mixture, the higher the number the harder it is to ignite, thus eliminating or reducing pre detonation inside the engine. I have also seen engines that simply would not run reliably on high octane gas. The high octane gas does not contain any more or less energy than pump gas (ethanol content notwithstanding) The semi-synthetic oil will be fine, just stick with a good 2 stroke oil that is designed for air cooled engines, many people have a brand preference, but it's mostly much ado about nothing. Also check the little compression springs on the carburetor adjustments and make sure they are compressed some, It may be unlikely but i have seen mismatched spring sizes cause the carburetor adjustments to move around because the springs were too short for the screws.
Posted on: 12/9/2011 6:04 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10852270

RE: ARF's ruined my hobby
[quote]ORIGINAL: jessiej [quote]ORIGINAL: wjvail [quote]Yes, I miss Heathkit! [/quote] I think the point of this thread, for me at least, is that while I don't miss the Heathkit itself, I do miss that there was at one time people in this hobby that had the attention span, inquisitiveness and intelligence to build one. I never built a Heathkit myself and the few that I saw built, were barely reliable enough to fly a plane. I don't miss the radio but I miss the people that built them. I've got too many ARF to DARE say I don't like them. Further, of course there are still many modelers in this hobby that have the attention span, inquisitiveness and intelligence to do whatever their imagination chooses... but there are now also many that think ''assembling'' an ARF is building an airplane. Not too long ago someone said to me that they thought someone could make a little money in this hobby by building planes for people that didn't have the time themselves... The punchline was he was talking about ''assembling'' AFRs. I didn't know what to say to him. We've now gotten to the point that assembling an almost-ready-to-fly airplane is something that could be contracted out?!?! I will confess that for a fleeting moment it occurred to me that ARF have ruined the hobby for me. That moment passed and I realized that the hobby I love is still here plus something new... Bill [/quote] Very good post indeed. Shame that some chose to focus on the jeans rather than the qualities once important to the hobby, and the people who possessed those qualaties. I suspect that those who ask the question; "Why build?". will never understand the answer. After all, why do some people learn to play a musical instrument when it is so easy to turn on a Radio and hear all the instruments? Those who both play the instruments and listen to recorded music would seem so much richer. I regret that I never learned to play. jess [/quote] I built quite a few Heathkit products when I was a teenager, quite a few kit model airplanes as well. I did learn to play the guitar, good enough to justify buying a USA made Telecaster and Stratocaster, Unfornuately after years of practice I realized that I actually have no musical talent whatsoever, I was only able to duplicate what others wrote and/or peformed, I don't play guitar at all anymore, I still enjoy listening to music though.
Posted on: 12/9/2011 3:26 PM by Author "HunkaJunk" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=10852055

RE: Stepping down the voltage of a 24v power supply
You could do it by building a voltage regulator circuit using a 7812 voltage regulator or more than one if you need more current. You could also use a DC-DC converter. The problem is either option would likely cost more time and money than a cheap Radio Shack 12V power supply would. I did see a 5 amp DC-DC converter at an electronics surplus store a couple weeks ago, I think it was $25 (used), these are often used in labs where you need very clean isolated DC power. There are also numerous tutorials on the internet on how to convert an old computer power supply into a stand alone power supply (+12v, -12v, +5v)
Posted on: 12/8/2011 10:13 AM by Author "HunkaJunk" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=10849866

RE: Call a LiFe a LiFe already!!
[quote]ORIGINAL: Jezmo Actually, they are not exactly plain LiFe batteries. The Genuine A123 batteries, because of the Nano Phosphate process, are called LiFePO4. It is a patented process that cannot be copied in countries where intellectual property laws are observed. That obviously doesn't include China where the belief appears to be, freedom to take what they want as long as it makes them money and furthers their agenda. The correct name for the first type would be Lithium Iron and the A123 would be Lithium Iron Nano-Phosphate. Yes I know there are some LiFePO4 copies from China, are they as good as A123? I don't know because all of mine are the genuine article made in a patent observing facility so I have nothing to compare to. What I do know is the A123 LiFePO4 cells are by far the best battery technology I've used in the 40+ years I've been in RC. [/quote] I don't think so, LIFeP04 (Lithium iron phosphate) has been around since the late-1990s, A123 may have their own unique manufacturing process (which may be where the "nano" comes in), but that is a unique process, not a unique chemistry. The patents would only pertain to their proprietary manufacturing process, if another company can produce the same chemistry using another process, they are free to do so. "Lithium iron nano-phosphate" = LiFeP04 (A-123) "Lithium iron-phosphate" = LiFeP04 This is the actual battery chemistry which was made in the late 90s, does the A-123 "nano" process make a better LiFep04 battery? If they make them like that and can sell them at a higher price I guess so, (spoken like a true market capitalist;))
Posted on: 12/8/2011 9:38 AM by Author "HunkaJunk" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=10849796

RE: Timing a RCexl without degree wheel
I have done something similar on 2 strokes where I didn't have access to the output shaft. I found TDC and BDC, and measured the distance of each with a depth gauge (measured through the spark plug hole). A little mathematics gave me a distance for the desired degree.
Posted on: 12/7/2011 9:54 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10848025

RE: Tired Old Man and Jody
If I say what brand of oil I use, there will be "someone" there to flame me for it. If I say what what Chinese engine I bought, there will be "someone" there to flame me for it. The "someone" is in quotation marks because it pertains directly to the topic of this thread. It's easier for me just to Ignore it all, and just continue successfully using the inferior products that I buy. I do get a certain amount of satisfaction out of being 100% self sufficient in regards to this hobby, If it's just continuing to use an evil brand of oil that I've used for 2 decades or deciding what engine to buy, I will exclusively use my own experience and judgement and ignore the opinions of others.
Posted on: 12/4/2011 5:32 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10843319

RE: ARF's ruined my hobby
[quote]ORIGINAL: jessiej Dam! That was harsh! Really? Do you speak to all your acquaintances that way? Or has the ARF/cyber-world brought a ''new breed'' of modeler to the table? [/quote] Many people seem to speak differently when they have no fear of a punch in the nose. Says much for the character and courage of current society. jess [/quote] Speak for yourself pal! I'll actually be harsher and more agressive in person, because in this day and age you can't just haul off and deck someone, but if I tell someone off and they hit me, that will give me the ability to say I defended myself with equal force when the cops show up to see who got their azz whooped.
Posted on: 11/28/2011 5:44 PM by Author "HunkaJunk" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=10833589

RE: ARF's ruined my hobby
[quote]ORIGINAL: dirtybird ARF's ruined my hobby. I used to enjoy building and flying RC aircraft and taking them to and showing them off at a fly in. Currently I cannot build an aircraft as precisely as the jig built Chinese ARF's with professionally applied covering without spending an enormous amount of time. Then I am reluctant to fly it. The fly ins I used to attend have either been taken over by youngsters flying 3D or have disappeared. To top it off 3D flying looks to me like someone tossed a cat up in the air - not like an airplane flies. I have no desire to do it even if I could. I need a new hobby. [/quote] Why are so worried about what other people do? Other people ruined YOUR hobby? Sorry, but that just doesn't add up.
Posted on: 11/26/2011 5:20 PM by Author "HunkaJunk" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=10830355

RE: World's smallest V12 engine (made in Spain)
Impressive craftsmanship.
Posted on: 11/20/2011 6:44 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10821566

RE: 7Amp 12volt Field Box Batt Question
[quote]ORIGINAL: pilotpete2 TonyL1, Sounds like the battery is still OK. There is no way to capacity check a lead/acid battery by cycling, as you would do with Nicds, or Nimh. Pete [/quote] You can test the spec on this battery, I use a voltmeter, and a small 12vdc heating element which draws approximately 7 amps at 12 volts. It is actually a 100 watt 12 volt heating element, probably from a motor vehicle heated mirror system or something. I have dealt with many hundreds of these batteries, if you test 1 amp for 7 hours, mathematically you come up with the same amount of energy, but it is not a proper load test for a 7.2 AH battery.
Posted on: 11/16/2011 4:15 PM by Author "HunkaJunk" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=10815450

RE: 7Amp 12volt Field Box Batt Question
Sounds like the battery is OK, it's a 7 Amp Hour sealed lead acid battery (gel cell), It should deliver 7 amps @ 12 volts for 1 hour. If it was sulfated from sitting without a charge you would see it, the battery would read 12 volts (or slightly higher), at which point the battery charger would think it is charged, when a load is placed on such a battery the voltage will drop severely, possibly even dropping to 0. The biggest problem with these gel cell batteries is they are more susceptible to sulfation than a wet cell battery is. This is the same battery that is often used in emergency lighting units and UPS power supplies, In these applications the battery life is often reduced because the battery never really gets fully charged or cycled, which causes the sulfate to harden.
Posted on: 11/16/2011 4:07 PM by Author "HunkaJunk" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=10815430

RE: Tower Is Replacing My Blown Up DLE 20!
[quote]ORIGINAL: wruggiero Hi, What kind o fuel did you use? How much oil ?[:o] [/quote] Yeah, because we all know how often an inferior oil will cause a crank pin to break when the bearing is not even bad.
Posted on: 11/15/2011 6:31 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10814066

RE: Is Tower Hobbies Crazy
[quote]ORIGINAL: MetallicaJunkie http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMZS1&P=7 i checking to see if the sold carb kits and found that one...... i can get that same kit for about 10 bucks [/quote] I don't know, I tried to buy a similar kit for a walbro at a local small engine supply house, it was about $40. I didn't buy it there. I ordered it online for considerably less. As far as profit margins go, Tower Hobbies is under the same boot that everyone else is. Let's say Company X can sell a product at a 400% profit margin, SO WHAT! If you are not willing to pay the price that the rest of the market will bear, then you should take your money elsewhere. A 400% profit margin is only a raw number figure, it does not account for overhead, The cost of the building to store the product, insurance to insure your inventory, adverisement to sell the product, Taxes (including taxes on your inventory that has not been sold yet...YEP). Now what is that 400% profit margin down to? Make cheaply a product that will command a high price in the marketplace, and there will always be someone there to critisize you for it, and probably legislate against your profits.
Posted on: 11/9/2011 5:13 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10804839

RE: DLE 55 Connecting Rod Bearing Failure
[quote]ORIGINAL: Antique I DEFY ANYONE to show me how Klotz can cause a wrist pin bearing failure without the piston being seized from heat amd the wrist pin turned blue... ...ANYONE [:@] [/quote] That's what I'm saying, there is no evidence that this was a failure due to lubrication, or lack thereof.
Posted on: 11/7/2011 5:25 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10801667

RE: DLE 55 Connecting Rod Bearing Failure
I'm just curious as to why the oil is being blamed for this failure. There seems to be no evidence that this failure was due to lack of lubrication or poor quality lubrication. I would say that the likely cause of the failure was the bearing itself. And just for the record I'm not a Klotz user, dealer, reseller, or anything else.
Posted on: 11/6/2011 12:57 PM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10799566

RE: RUNNING ZENOAH WITHOUT FILTER/SCREEN
And this my friends is why RC universe has the reputation that it does, The thread has a few posts trying to give the OP information, but has generally degraded to comments like he shouldn't have tools or is too stupid to use a search function. Some of you jerks should just go pound sand down a rabbit hole, it would be a more productive use of your time. If you have a problem with the guy's question, go sulk quietly in the corner and let the rest of us alone with your snide comments.
Posted on: 10/26/2011 9:25 AM by Author "HunkaJunk" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10783458