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Posted by phil alvirez | Aug 07, 2018 @ 11:53 AM | 715 Views
in the morning, frequently i see gulls at parking lots. many of them.
some have ideas on why, as you can see on the attached link:
https://www.google.ca/search?hl=en&s....0.-G4o8yM6F0s

but i see that they stand there doing nothing, for several minutes. frozen.
just today arrived 10 minutes before the store opens, so i watched them. they are not socializing. just freeze.
sometimes hundreds of them. no noise. then, after a long time, 1 decides to take off. then another. sometimes all go.
so i began to think that must be a reason for that strange behaviour.
lets see:
1-they are not there for food.
2-they dont deal with 1 another
3-they spend considerable time sitting there still
must be something they find at the parking lot.
parking lots are covered with asphalt.
could it be that the asphalt warms up and keep the warmth better that the surroundings, and this way they warm up and makes flying easier?
it is the only thing that occurs to me.
it was at a large parking lot of a sports arena where i used to fly my small park fliers at dawn that i witnessed 1 of the strangest situations.
i was flying 1 of my small foamy planes fashioned after a gull and testing a new gearbox. that day there were over 1 hundred of them.
everytime i launched it, several gulls took off and followed it closely, and when i stopped the motor they left. then i noticed that the gearbox made a high pitch sound. barely perceptible to me, but that could sound to them as a cry or something and they approached the plane trying to learn what was that about. i think there is a short video at my blog showing that.
but could be another reason for them to gather there quietly.
any1?
the plane mentioned is at page 13 of my blog
Posted by phil alvirez | Jul 30, 2018 @ 08:34 AM | 1,996 Views
when talking about what color provides the highest visibility, a fellow said that where he flies, the sky is dark blue.
and this made me think about it.
is it possible that the blue of the sky could be darker or lighter depending on the surroundings? i mean, during the day.
i remember when i lived in vancouver bc, that there was always a thin layer of mist, so the sky looked pale blue. but besides this, i dont recall seeing the sky dark or light when no clouds or mist is present.
so, what is your experience?
Posted by phil alvirez | Jul 09, 2018 @ 10:32 AM | 1,685 Views
today at dawn it was clear sky, no wind, no turbulence. sometimes is like this at dawn, when i fly.
i flew 2 of my light gliders to 200 meters for several flights. pleasant flights.
then i launched my 2 meters radian sailplane that flies good too.
this time i decided to climb to 300 meters (some 1,000ft). as the sun was low at the east, i made a large turn starting from the north and ended up at the southeast. but then the plane didnt glide towards me. even began to move backwards, so i put it on a gentle glide to penetrate the wind. took me a long time to bring it back! at 100 meters began to move forward by itself, but with some turbulence.
i have faced high winds before, with some wind down here, but this time i didnt have any clue of a strong wind up there (clear sky), whilst down here there was no wind at all. zero. zilch. next flight launched facing the wind and kept the plane upwind, so there were no problems.
so, dont think that no wind down here means no wind-or some but not much-up there. but this never happened to me
Posted by phil alvirez | Jul 08, 2018 @ 10:44 AM | 1,688 Views
https://www.rcgroups.com/forums/show...pan-EPO-Glider
i learned about it when searching and ended up buying it.
i have an index on it here:
https://www.rcgroups.com/forums/show...-Glider-1500mm
my opinion:
1-plane is a great flyer. stable but responsive. stays long time up there. havent been able to fly it on weather that has thermals, but from my experience with gliders, it should be great. and the comments at the forum confirm this.
2-there are some problems that the maker did not solve: 1 of them is that the screws that are intended to hold the wing in place are not long enough. the solution is to use the 1 from the front, at the rear and buy a longer (36mm). so you can not fly the plane as is
3-the way the wing is attached is not the best: pushing the wires for the ailerons is a chorus. not much space in there either. and the fixtures are not strong. in a hard landing they may become detached and is difficult to repair.
4-the idea of just 1 servo to move both ailerons does not work> there is too much drag and ailerons dont return to neutral-and the stress may kill the servo in short time. it is necessary to install 1 servo per aileron.
5-likewise, running the pushrods through the boom is too draggy. a better way is installing servos for rudder and elevator at the tail by inserting them into the fin and stabilizer and running the wires on top of the boom
6-it is necessary to cut open the top of the fuselage between the wing and the hatch (...Continue Reading
Posted by phil alvirez | Jun 12, 2018 @ 10:03 AM | 1,696 Views
nothing comes from nothing.
when i got started in radios, they were proportionals. and had a trim .
great stuff! (before, they were not, neither had trims)
they did nothing else, but seemed enough for having fun.
then came the revolution of programmable radios. the war began between manufacturers to overcome the competition (and still is).
more things, more gimmicks, more switches, buttons, things that they can do. (probably more than we need).
sometimes they came with a manual that explained everything, so you could learn all that they could do and you needed.
but now we find ourselves with some that dont explain all that you need or want to do.
sometimes there are places where you can ask or dig into and find the answers.
bur other times dont. and also sometimes when you ask, you not only dont get the answer, but get talked down, as if you were retarded.
so searching may bring the answer. still, wonder why not all radios come with a real manual, that explains how to use them.
on the other hand, there are manuals that do so. an example: https://app.box.com/s/cb3b695b7552a051d351
i think that if i explain where my roots are, some will understand my disappointing with no manuals-or not complete:
i learned to fly airplanes (full size) before driving a car. in aviation you do nothing until you learn every detail from a manual. you dont touch a switch, button, lever-nothing. if you do, you may die-or are fired. thats why the log book. then my 1st job was translating manuals that had everything in full detail.
nothing was left to the imagination. and thats why air transportation is the safest way; not because it is, but due to the way rules and regulations-and manuals- have made it foolproof.
Posted by phil alvirez | Jun 10, 2018 @ 08:34 AM | 2,181 Views
telemetry: an almost magic word that conjures dreams of getting data of everything we want or need.
according to the heritage dictionary, it is: "(tə-lĕm′ĭ-trē) The automatic measurement and transmission of data from a distant source to a receiving station. "
but, what really can we get for our purposes? what we need?
for instance, as i fly electric gliders, i need to know volts of the pack in the plane so i dont loose power; also altitude; and these by a voice telling me the figures so i dont have to take my eyes from the plane; and vario with beeps to tell me if the plane is climbing or sinking. (also an alarm when the radio battery reaches the critical volts-but this is not telemetry)
i got vario and altitude by means of a device that can be used with any radio, and low volts of the pack (and audible alarm or vibration) from another, that also can be used with any radio, so everything works great.
lately i was given a radio with telemetry and i used a receiver that has telemetry so i can get some data too. so far, the receiver performs great. no problem with it. but with these i have learned that getting what i need depends on the radio capability and the instructions to use it, and that has not been as i need. have been told by an "expert"from the radio that posts at a forum where the receiver and that radio are been discussed, that i have to discuss the radio and its manual at the thread of the radio, but there he-...Continue Reading
Posted by phil alvirez | Jun 05, 2018 @ 02:38 PM | 2,584 Views
am starting a thread on the lemon 0052 receiver with telemetry and modulation DSMP and also compatible with DSMX and DSM2. am using it here with the DX6G3 radio. as this is a work-in-process, please check from time to time at the bottom as i may add something.
the receiver: https://www.lemon-rx.com/index.php?r...product_id=160
the radio: https://www.horizonhobby.com/dx6-6-c...ode-2-spmr6750
the thread: https://www.rcgroups.com/forums/show...s#post39758353
when i learned that this receiver was available i got 1. as i fly electric gliders it has several items that i use so would be very convenient.
then i learned that there is a forum where they are discussed so went there. there are instructions and data about it written by John (jj604), and is being used with the radios from horizon. John has been writing instructions for several products, some of them by lemon, without being paid (he has no participation on the business of lemon). then i got a DX6G3 and began learning how to use it with the 0052 and asked for advice at the forum but i was told by a fellow (who, by the way, works for horizon and posts at that thread) not to post there as it was about the 0052 only and i should go to the DX6G3 forum. wonder why he said so. he is the least to have the right to say that, as him participating at the thread of the competition is conflict of interests. and when i went to the forum, he told me that he already answered the questions at the other forum and...Continue Reading
Posted by phil alvirez | Mar 18, 2018 @ 12:51 AM | 2,485 Views
thermals-where?
i have flown at thermals that start from the ground, and others at the base of a cloud.
from the ground, i have flown hand launched gliders (free flight) and watching for the breeze to flow and stop have been able to detect the cycle and launch at the right time.
from the base of the cloud, with r/c electric gliders.
from the ground, there is no doubt that they start at ground level and keep raising. some say as bubbles, others as cones.
and seem to increase in diameter and strength as they raise.
but those that are found at the base of a cloud seem to behave different.
sometimes the plane stays under the cloud. others, they get into-and disappear. that means they keep climbing.
and in the case of those that remain at the base of the cloud, sometimes getting a little bit lower there are no thermals. they sink.
so seems that they are created by the cloud itself and only at that level.
am posting it with the intention to hear from those with some experience on the subject.
please only comments polite, positive and to the point.
i started a thread here-lets see if some1 brings positive comments: https://www.rcgroups.com/forums/show...thermals-where
Posted by phil alvirez | Mar 16, 2018 @ 12:54 AM | 2,475 Views
i would like to buy a battery from hobby king.
besides being out of stock, they dont offer an option about shipping. there is only 1 way (ups) and is more expensive than the battery itself.
i tried to persuade them to offer the option of surface shipping and their answer was that they dont do it because everybody wants it now.
then i said this:
" shipping lipos surface also-why not?
i wonder if reaching you this way you will answer:
tried to order this:
https://hobbyking.com/en_us/turnigy-...___store=en_us
but ships only ups so is way more expensive.
to drop the cost, isnt there a way to ship surface even if takes forever?
other suppliers do it, so why not you?
cost is $19 and shipping (the only way:ups) is $22-plus ups charges something extra for delivery. see:
https://hobbyking.com/en_us/checkout/cart"
https://www.rcgroups.com/forums/show...4#post39338452 posts 2596 and 2600

and then they deleted my post!
no answer, no reason why they didnt answer.
so in fact, you dont have the chance to discuss anything that they dont want to.
isnt this great?
Posted by phil alvirez | Mar 07, 2018 @ 11:13 AM | 2,507 Views
i fly 2 meters gliders. with electric motor for climbing. after that, stop the motor, prop folds, and hunt for thermals. thats all. is a way to enjoy flying models, and is all that i want. usually i have to search for thermals, and sometimes i find some moderate that i have to work out for staying up, and that is the fun of it. some days there are no thermals at all. and other days i find some that i have to fight to bring my plane back. even in cold weather. recently found myself again into this situation. cloudy, not much wind, near freezing, there was a large thin white cloud above, not thick enough to have grey under. launched to 200 meters (640 ft), stopped the motor, prop folded, and the plane began to climb. i have a vario with voice that tells me the height every 20 ft, and noticed that the plane was climbing fast. in no time it was at 300 mt, so i began to give it some 'down' elevator, but still was going up very fast, so decided to move around to find a spot where there was no lift. still reached 400 mt, 450, 500... (never been so high .). the plane was visible because it is covered in black and was on a white background, but it was that strange feeling that the sky was trying to claim my plane (it is not the 1st time . )
dont know how long it was up there. time ceases to exist in these circumstances...you dont even know whats your name...
i decided to move it away from the cloud, but when drifted away from it, the blue sky was not so much contrast, and was...Continue Reading
Posted by phil alvirez | Mar 07, 2018 @ 07:07 AM | 2,514 Views
thinking of new technology that could be used for our models, just got a link to this: http://www.bbc.com/news/business-43285885
of course, has to be lots of experimenting.
but remember what happened to leds, that were so far from what we have now.
and transistors, that replaced vacuum tubes...and were way larger and costly.
and what we are enjoying like cellulars, gps,
even personal computers, and the internet!
things that seemed so far fetched a few years ago...

so, lets see how this evolves
Posted by phil alvirez | Feb 10, 2018 @ 09:15 AM | 4,215 Views
getting altitude readings and thermaling
i search for thermals, just for the fun of it. no competition.
1-i have been using a device that tells me the height (voice) at certain levels (like every 20 feet or meters).
2-and now i am getting another that tells me the height every 10 seconds (or whatever time i want).
i cant use both at the same time; just 1 or the other.
am trying to decide which way is or may be more convenient.
but i find the 1 am using very convenient for my purposes.
so far i havent been able to test the 1 that tells every 10 seconds.
i wonder if some1 with experience could bring comments about these options; if he has tried either or both.
only comments polite, positive and to the point please.
i started a thread on something related that may be of interest: https://www.rcgroups.com/forums/show...metry-what-for
Posted by phil alvirez | Jan 31, 2018 @ 08:23 AM | 3,908 Views
i wonder why all radios manuals are not like this: https://app.box.com/s/cb3b695b7552a051d351
with it you have step-by-step instructions where you see the screen exactly how it is. on the other hand, with many radios the instructions seem to be written by experts for experts.
but, what % of customers are experts that can follow the instructions of all those manuals without the need for all the details?
and when you approach any forum on any radio and ask questions for details that are not explained, you get so much flak that is understandable why many dont dare to ask.
i hope some day the sellers awake and do their manuals for the people. their sales would raise a lot.
>>> recently i have been in contact with customer service of horizon, and they are very good at advice. that makes a difference. will stick to them for all the doubts i have. but feels good to have support. still, some times i dont get the answer that i need, and also takes time to get it, even if they are fast. having to ask is not he best way. better to have a manual that you can consult anytime.
Posted by phil alvirez | Jan 18, 2018 @ 11:33 AM | 3,935 Views
for many years, i never missed the Tommy Hunter show. folk music. when i was in vancouver, he was in toronto. when i went to california, he went to nashville. when i came back to canada (this time to a place north of toronto), he came back to toronto. but i never had the chance to meet him in person. it was until, in recent years, he came to windsor, where i live, that i had the chance to meet him. i liked his show because had a message of optimism. not only happy music. at the end of each show he hung his guitar and had a phylosophical talk. 1 of them was about a nearby farmer that he went to visit. he said that his wife was going to have another baby and he was out of money. his house needed roof repair as leaked all over; the bank denied a loan so his helper left due to lack of payments; the cow broke in the fence and eat all the beans; the hogs got cholera and died; the soil was so dry that you couldnt rise an umbrela on a sack of fertilizer; and his mother in law was moving in to stay. then he said: but we are still living, so everything is o k.
so, whatever you are facing, remember the philosophy of the farmer. after all, things may not be that bad, and we are still living...
(but he didnt have health problems, after all...then who knows what his thoughts would be).
Posted by phil alvirez | Jan 10, 2018 @ 04:10 PM | 4,157 Views
we were having a private discussion and i was confused due to data not clear, so i posted at a forum, but then he decided to say this, that, as he now was not polite-and public, i tried to show the reason of the confusing data:
all started with this message i got: Phil,
You asked me that this morning by PM. I told you it does. Several times. You have searched the telemetry thread using the keywords I gave you and found that it does.
Why are you needing to ask again? Do you need a plastic spoon or something?
As noted then, ALL OUR G2 RADIOS SUPPORT THE VARIO. Those with speech can speak the altitude to you as well.
Andy
from the beginning
1-here is how this started: i asked you:
Originally Posted by phil alvirez
this is the feature that i need: (from the ad of the DX6G3):
" PROGRAMMABLE VOICE ALERTS
With voice alerts, the DX6 will allow you to keep tabs on important functions without ever taking your eyes off what you’re flying. They can be programmed to call out what flight mode you’ve chosen or report telemetry information on demand. If an alarm goes off, you won’t have to look at the transmitter display to see what’s happening. The DX6 will tell you. "
and i hope it can tell height too-and send beeps for climbing or sinking.
if not, this also is useless for me.
(please notice that the ad refers to DX6, and not to Dx6G3-a confusing issue i think).
then your answer:
"Those are functions from a vario, and yes, it supports vario to...Continue Reading
Posted by phil alvirez | Dec 28, 2017 @ 10:10 AM | 4,775 Views
browsing i found this: https://www.banggood.com/Unique-Mode...r_warehouse=CN
the proportions look great: longish wing, characteristic of high performance gliders looks promising, and long fuselage makes it look elegant. besides, the style is great too. long fuselage is not the trend in gliders, but long tail moment speaks stability, and long nose provides room for the things we need to put inside-and to balance too.
i finished it and am waiting for weather to let me fly it, although where i live means 4 months, so in the meantime i will talk about whatever regarding it.
>>>please check updates at the end<<<
there are 2 threads:
https://www.rcgroups.com/forums/show...pan-EPO-Glider
and this: https://www.rcgroups.com/forums/member.php?u=557269
index: https://www.rcgroups.com/forums/show...m-Wingspan-EPO
so you can learn about the experience of some.
if you browse at the links you will see that just as there are comments about how good the plane is, there are also problems, like poor quality parts, some size does not match (screws to hold the wing), no availability of spare parts, lack of instructions (the so-called 'manual' is a joke), too much drag at the aileron pushrods, and so on... new products are subject to iniciation, and it is not until feedback may help suppliers to correct them, but even with these problems, the plane has a lot on its favor, so will explore the posibilities...
dec 30/2017:...Continue Reading
Posted by phil alvirez | Dec 23, 2017 @ 06:42 PM | 4,687 Views
"i now belong to the higher cult of mortals,
for i have seen the albatross..."
when i was channel surfing, found a documentary on birds. it was a film with an albatross flying. i couldnt change channel or take my eyes away!
i have seen other videos and even got into discussion on how these birds fly. https://www.rcgroups.com/forums/show...ynamic-soaring. some called it dynamic soaring, and provided all kind of explanations that made sense.
but, no matter what, i still am fascinated on how it flies. still cant understand how it flies without flapping its wings.
watching those videos of albatross in flight i loose my mind. does look as if does nothing and stays so close to the waves for a long time and doesnt fall.
there are videos on it in flight. https://www.google.ca/search?hl=en&s....0.Sg76Jpg7Lc0
and to think that they fly all day long, day after day...with just a short stop to feed and then sleep at night. can you visualize that? for their entire life!
beyond the wildest dream!
Posted by phil alvirez | Dec 07, 2017 @ 12:05 PM | 4,944 Views
i read a report of a mystery problem found in a great airplane, that shows that even with planes that seemingly perform good, there are things that happen that go unexplained. pay special attention to the end of the article.
https://airfactsjournal.com/2012/11/...uring-mystery/
and things like this also happen with our models
Posted by phil alvirez | Dec 06, 2017 @ 10:45 AM | 5,477 Views
sometimes you loose radio signal, or becomes erratic. even results in a crash. checking the radio afterwards, all seems fine. and when this happens and some1 is around, or you talk to some1, frequently they say or think that is was pilot error. yes, sometimes a crash is due to that. but when the loss happens to you, with no1 around, and you did not make a mistake, you know it was not you.
then, what happens? perhaps something in the atmosphere? give a look at this report: http://cdn.intechopen.com/pdfs/16080...o_humidity.pdf and this: https://www.reddit.com/r/askscience/...r_atmospheric/
https://annals-csis.org/Volume_5/pliks/241.pdf
at the end says: In summary, our study has the following main contributions:
We show that changes in weather conditions affect radio
signal strength. Temperature seems to be the best explanatory
variable for signal strength variation and has a
negative, linear effect on signal strength in general, while
high relative humidity may have some effect, particularly
when temperature is below 0◦C.
We show that correlation between signal strength and the
studied weather variables vary depending on radio channel
and link. Applying frequency diversity will alleviate
these effects.
We show that smaller transmit power results in smaller
unexplained variation in received signal strength (in most
cases) and thus stronger correlation with the studied
weather variables
i used to fly...Continue Reading
Posted by phil alvirez | Dec 02, 2017 @ 07:17 AM | 5,796 Views
i always have been fascinated with soaring. staying up without motor. like the birds!
at the beginning, and for many years, i flew free flight, as there was nothing else available. and learned about thermals. with hand launched gliders, then towline gliders, rubber powered planes. engine powered planes.
many years later, when radio became affordable, i got into thermal at will. that is, when i learned to find them.
now with vario is easier, as it tells me the height or if the plane is climbing or sinking. but always a pleasure to me.
recently began to experience some situations where i could make my plane stay longer without a thermal, and explored the slope and dynamic soaring. i found data at a forum, that was enlightening: https://www.rcgroups.com/forums/show...ynamic-soaring
still, what i found by chance does not match what these guys say. what happened was that once i found my plane flying a little bit faster than the wind and decided to do lazy 8s facing it so it didnt go beyond the area where i wanted it to be, and noticed that it didnt sink for a few seconds (i have a vario that tells me the height every few seconds) and became intrigued. i have reached the conclusion that it is sort of dynamic/slope effect. except that this happens in midair-no hills/cliff.
the way i see it is this: when my plane is flying at a speed slighty higher than the wind, i do lazy 8s facing it. that is: fly across the wind, then turn facing it. when the plane raises...Continue Reading