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Hello?
My popcorn is getting cold.
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almonds
doesn't matter how long ya keep em in the jar... |
Peanuts as well.
Better yet, honey roasted peanuts |
Originally Posted by b_gradinger
(Post 12538451)
My popcorn is getting cold.
:) |
Not a new guy, not a troll. Been on this site for years, getting good info. Learned a lot. I just don't post very often. And it's good fun watching the dozen or so people that do post go round and round.
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join date dec 2018...
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Joined, yes. Lurked for a while. Only joined to ask a question.
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Originally Posted by b_gradinger
(Post 12538739)
And it's good fun watching the dozen or so people that do post go round and round.
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Init4fun- I've always enjoyed your posts- you have some great knowledge. As for your slamming me about a fun post, don't know what to say. Was just remarking there had been no traffic on this AMA thread in a day or so.
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Originally Posted by b_gradinger
(Post 12538759)
Init4fun- I've always enjoyed your posts- you have some great knowledge. As for your slamming me about a fun post, don't know what to say. Was just remarking there had been no traffic on this AMA thread in a day or so.
I took your post as meaning that you wanted to get enjoyment by watching the regular posters go round and round battling each other . If I mistook that , then you do have my apology , for real . Just know that there are people who do get their kicks by stirring up dust here , and that was the basis for my scathing response . I hope you are sincere , since quality participation here has been somewhat lacking lately ... |
Init- I totally agree about the participants that usually occupy this AMA thread. Intelligent people, good info.
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And no dust stirring.
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Normally, the dust stirring comes from having opposite sides of an issue actually "duke it out", at least in their posts. Since there's been no new subjects or threads, the forum has pretty much gone dead. Until someone comes up with a new "controversial" subject, it will stay that way.
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Let's all be honest here for a moment. Most of the threads here in the AMA forum are intended to solicit a response from certain people. Heck one of them mentions me by name even. I wouldn't be so quick to call out a new poster for behavior that some regulars exhibit on a regular basis. |
Originally Posted by speedracerntrixie
(Post 12538784)
I wouldn't be so quick to call out a new poster for behavior that some regulars exhibit on a regular basis. |
I can certainly agree that we should all be out flying, camping, date nite with the wife etc. instead of getting hung up on what someone said on the internet. I myself have attended 5 events in the past 6 weeks. This last week I spent Thursday through Sunday helping run an IMAC contest and practicing for both and upcoming sailplane contest and Pattern contest. Logged 30 flights between the two airplanes. |
I haven`t flown at all lately `cause I can`t stand the heat. I sweat so bad that my vision gets hampered. No shade at our field unless you have a portable canopy.
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Perfectly understandable. There are times when the elements can take the fun out of it. I was signed up to fly a pattern contest earlier in the month. The Wednesday prior to the contest the weather forecast for the region was 20 mph winds. I decided pretty darned quickly that I wasn't going to drive 4 hours each way to fly in those conditions. I ended up going to a local sailplane contest instead. Now that I am in the greater Northwest, I have a feeling there are going to be many days when flying will be hampered by the weather. More building time. |
MODEL AVIATION MAGAZINE jULY 2019
Proof once again how little attention we pay to the MA rag!. July issue has been out for almost a month and no one has commented that it has a MISPELLING on the cover. ON THE BLEEPING COVER!!!!
Of course it does have Jay Smiths No. 100plus picture in it! |
Maybe that's the old English word....
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Originally Posted by b_gradinger
(Post 12538739)
Not a new guy, not a troll. Been on this site for years, getting good info. Learned a lot. I just don't post very often. And it's good fun watching the dozen or so people that do post go round and round.
But I will post my 2 cents when necessary.... |
Originally Posted by GSXR1000
(Post 12538905)
Yep, I've been a member since 07-24-2004, I'm not a big poster myself; even though I work in a office and can post here throughout the day. I've been on RCG almost as long but had to redo my login to a newer one than my older original...
But I will post my 2 cents when necessary.... |
My common sense tells me that when a technical thread comes about that I should only join the thread if I have hands on experience with the subject matter. Many times when I do join in a thread it's because I have been there, done that, made the mistakes and am attempting to help a fellow modeler avoid a long learning curve. |
I'm pretty sure that everyone else that gives advice has been there and done that as well. Most of the questions that I've seen asked in the forum haven't required a PHD in aeronautics or years of competition to answer
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Like Dihedral makes ailerons less effective or that 72mhz is more reliable when the RX antenna is routed outside the balsa fuselage. Funny since we put all our 2.4 equipment on the inside unless its a CF structure. Thinking about this a little more, since I have in the past built and painted a few Prather tunnel hulls and Deep Vee's for customers back in the day would that make me equally qualified as you to advise guys in the boat forums? |
Originally Posted by speedracerntrixie
(Post 12538939)
Like Dihedral makes ailerons less effective or that 72mhz is more reliable when the RX antenna is routed outside the balsa fuselage. Funny since we put all our 2.4 equipment on the inside unless its a CF structure. Thinking about this a little more, since I have in the past built and painted a few Prather tunnel hulls and Deep Vee's for customers back in the day would that make me equally qualified as you to advise guys in the boat forums? BTW, since you seem to have forgotten, it used to be standard practice to route antennas out of the top of the fuse and up to the top of the vertical stab. It was also a standard practice to route the antenna inside the fuse using a zig zag pattern for better reception. My first two planes were routed in those ways per an instructor's directions in Idaho Falls ID. That was back in 1986 and, since AM and FM systems haven't really changed, that is unless you have a PCM or 2.4GHz system, that information is still good. A CF control rod can still affect how a signal is received, considering CF is used to make antennas used in two way communications but, then again, that's old school tech that's not used anymore for anything in R/C, especially aircraft. Since you know everything, what fuel do I need for my boats? I have boats that run .21, .45 and .67 sized engines. Can I get away with 5% nitro or is that too much? |
I started running antennas inside in 1983. Having an antenna external on a sailplane was just ugly, I just continued doing it on my power airplanes as well. You are correct that external was pretty much standard though although there is no supporting data that it was any better. Fuel for your boats. Without knowing your compression ratio, plug heat and load that is an unrealistic question. That being said, I do not Veiw myself as equally qualified in the boat world. You clearly have much more experience and I am one who places value on experience. There is not much you could tell me about R/C boats that I would not take at face value. When it comes to the details of high performance power boats I can easily admit that " I don't know what I don't know ". It's a shame that you seem to not value experience in the same manner but I suppose it's humanity's differences that keeps life interesting. |
My current bench-https://cimg2.ibsrv.net/gimg/www.rcu...d328742a90.jpg
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Also this, since I live on a lake.https://cimg4.ibsrv.net/gimg/www.rcu...992427211c.jpg
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Originally Posted by b_gradinger
(Post 12538958)
Also this, since I live on a lake.https://cimg4.ibsrv.net/gimg/www.rcu...992427211c.jpg
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Garage sale find. 15.00 bucks. It's a bit old; will need newer rigging.
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Originally Posted by b_gradinger
(Post 12538958)
Also this, since I live on a lake.https://cimg4.ibsrv.net/gimg/www.rcu...992427211c.jpg
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Originally Posted by speedracerntrixie
(Post 12538939)
Like Dihedral makes ailerons less effective or that 72mhz is more reliable when the RX antenna is routed outside the balsa fuselage. Funny since we put all our 2.4 equipment on the inside unless its a CF structure. Thinking about this a little more, since I have in the past built and painted a few Prather tunnel hulls and Deep Vee's for customers back in the day would that make me equally qualified as you to advise guys in the boat forums? The 2.4 has little choice based on the current designs. But try 2.4 in a submarine sometime for a real lesson in radio systems. And a 2.4 low in the hull of a boat can be blocked by waves. Makes for loads of fun. |
Originally Posted by Hydro Junkie
(Post 12538971)
I haven't seen one of those in years. If the wood is still in good shape, you done good
My Six Meter during construction. Glass hull, the rest scratch built by me. White Oak planked deck with Mahogany trim. 60 inch LOA and about 22 pounds rigged. https://cimg0.ibsrv.net/gimg/www.rcu...e9fa62cd59.jpg |
Originally Posted by Hydro Junkie
(Post 12538945)
Why not? You seem to know everything about everything else.
BTW, since you seem to have forgotten, it used to be standard practice to route antennas out of the top of the fuse and up to the top of the vertical stab. It was also a standard practice to route the antenna inside the fuse using a zig zag pattern for better reception. My first two planes were routed in those ways per an instructor's directions in Idaho Falls ID. That was back in 1986 and, since AM and FM systems haven't really changed, that is unless you have a PCM or 2.4GHz system, that information is still good. A CF control rod can still affect how a signal is received, considering CF is used to make antennas used in two way communications but, then again, that's old school tech that's not used anymore for anything in R/C, especially aircraft. Since you know everything, what fuel do I need for my boats? I have boats that run .21, .45 and .67 sized engines. Can I get away with 5% nitro or is that too much? A great many things effect signal propagation. Power out of the TX combined with Rx sensitivity just to start. Neg 80 db is a typical level for our receivers. Very difficult to see on a scope because background radiation runs at those levels too. Frequency is another big factor. 75MHz for the sub guys can go as deep as 10 feet depending on water condition. And sometimes even more. While 2.4 simply does not penetrate water to any real amount. An inch if you're lucky. Weather also impacts propagation. Humidity will play havoc. In the micro wave communications world it's called Rain Fade. 23 Gig MW systems I could push a signal 10 miles in the desert at 100 mW. Let it start to rain and I'd be lucky to go 100 yards. But my Satcom systems at 7 Gig would do 23,000 miles on just a couple of Watts. And even the sun can play with it. Ever get a hit when you fly past the sun? It happens. Not often but it does happen. And I suspect it happens more often with 2.4. But don't believe me. I've just worked the environment for over 40 years. |
Originally Posted by Appowner
(Post 12539023)
Anything, ANYTHING to include the air will attenuate the signal of any radio. Placing the 72 antenna outside the fuselage gets it away from ANY potential interference. Do you have to? NO! But I have also seen it solve problems.
The 2.4 has little choice based on the current designs. But try 2.4 in a submarine sometime for a real lesson in radio systems. And a 2.4 low in the hull of a boat can be blocked by waves. Makes for loads of fun. |
Originally Posted by speedracerntrixie
(Post 12539087)
I agree that separating the antenna from metal pushrods, cables, servo leads can improve signal reception. That however is not what we were discussing. The claim was that the fuselage shell ( most cases balsa ) could impede or attenuate signal. You can theorize all you want but unless you have supporting data it is nothing more then theory especially at 72mhz. In fact as frequency increases it would be more of a consideration. So why was it such a concern with 72mhz but not with 2.4gz at a lower power level? Theory is nothing more unless it is put into practice. Although I agree that you have more education outside of the hobby as eveidenced by the extensive resume you for some reason felt the need to PM to me, I have much more experience and at a much higher level in the hobby then you. Please keep that in mind. |
https://cimg9.ibsrv.net/gimg/www.rcu...2e6a5dba90.jpg Note the short stub antenna on the Orange fuselage Absolutely correct, as I said in my previous post it should be more of a concern with 2.4ghz due to the fact that the higher frequency does not " penetrate " as well as lower frequencies. Yet in spite of that the standard install is to have 2.4ghz antennas internal. A good example is this lineup of my contest sailplanes. Note that the two white sailplanes have Kevlar construction and the antennas are internal. The Orange sailplane is CF construction and has its antenna ( just the last 1/2" ) external. All 3 sailplanes have topped 1,500 ft in multiple locations. Like I said to Appowner. Keep in mind that when it comes to the hobby I have more experience and at more then just an armature level! |
A 1/4 wave antenna for 2.4 is just shy of 5 inches long. All of which should ideally be outside any carbon. Unless there's something else at work here. Please enlighten us with your expertise and explain WHY you have only 1/2 inch of antenna outside the fuse?
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