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Messages - Deerslayer

Pages: [1] 2 3 ... 58
1
Dave Fasken and I both have the Jumper T16. OpenTx is great, provided you like learning new things. For that matter, there are a couple of other guys who are familiar with it, Adam being one of them, as it is the Taranis operating system.
I think that Dave may be getting a Radiomaster, mostly out of curiousity. He has 2 Jumpers, one may be for sale, so talk to him. Radiomaster was spun of by some folks who previously worked in the Jumper outfit.

The multi-protocol system supports about 20 different manufacturers' protocols. The last time I bothered to check, about 4  months ago, the Developers had added Graupner to that list. I had a couple of Turnigy/FLYSKY Rx sitting around, so I stuck one in an airboat, bound it and it works. Dave has FrySky and other brands as well.

Knowing you, I would say that you would have a lot of fun with either the Jumper or Radiomaster at 1/2 to 1/4 of the cost of comparable systems. BTW, they will support the old DSM2, which your Spektrum and other EU approved brands are no longer allowed to deal with, as you found out with the Orange Rx in your Fun Cub.

I have spent a lot of my Covid time playing around with the OpenTx logic capabilities (slow learner here!), setting up AutoLaunch logic for my wings, etc. Some of the concepts are really different and interestig  e.g., the use of a Channel for something other than a  actual output from the Tx. Hint: I used Channel 13 for something, where receivers only had 4 or so actual channels - you will figure it out!

Get one  it will be a good way to spend your Summer.

2
Here is a simple experiment, which anyone can perform, that demonstrates the difference in drag between a free-wheeling prop and one that is held stationary.

https://www.youtube.com/watch?v=g5eUrI6vxco&feature=youtu.be

There is a useful extension to this which could again be proven with a simple experiment, i.e., mount the prop onto a motor on a similar test rig and see what happens in the case where the prop is held at a slow idle.

Why should we care about this?

Note that in full scale multi-engine aviation, if an engine stops, the pilot immediately commands the prop to feather. that increases its pitch to present the minimum drag and lift. It will stop rotation for the duration, thereby making the best of a non-ideal situation.

In flying electric models, we typically see landings taking place with the motor off, prop most likely stationary - non feathered, just not developing enough blade lift to keep rotating. At the same time, the landing may seem to be longer than perhaps is desired. It would probably be more efficient to keep the prop rotating at a slow idle, with the "prop disc" then creating significant drag and shortening/steepening the approach and landing. Wouldn't it? My own experience is a definate Yes, especially with powered sailplanes, where landing in a confined area can sometimes be a bit dicey. In that case, if you have a folding prop, holding a minor amount of power right up until the flare will prevent the prop from folding and will effectively employ a great spoiler.   

Another observation: Have you ever had a glow or gas engine quit in air and noticed that the plane might just glide better and be going faster during the landing? The prop is not spinning, so you are part way toward a true "feathering" of the prop, with resulting low drag.

Also, say you have trouble getting a short approach and landing, try cutting back to idle and putting the nose down to pick up some speed early on; the prop will be creating very high drag due to the reversed direction of air through the disc and you may be able to achieve a steeper approach without building up excessive airspeed.

Think about it!

3
Dwayne, our CFI, has determined that Wednesday nights will again become the official Training Night for this year.

This is effective immediately.

4
Here is what I think is a good suggestion from the Spektrum Forum (applicable to any system, of course).

Check out that your Throttle Failsafe works !!!! You should do this from time to time anyway, but let's double check it now.

Restrain your plane, either by tying it down or having someone else hold it.

Run your engine or motor at perhaps a fast idle and leave it there.

Put your transmitter into its Range Test mode. Start walking away, having the plane held facing you. This is a worst case scenario for 2.4 GHz radio communication, as for most planes there is likely to be things like the battery, engine or motor, ESC and/or other metallic or electronic objects in the path. As well, your body will be tending to  block the transmission. Did you know, the 2.4 GHz signal is attenuated (weakened) by high water content in things like clouds and human bodies?
   
At some point, you should hear, or your assistant will tell you, that the Receiver has lost its signal, as evidenced by going into Failsafe mode. Take the Transmitter out of Range Test and ensure that the system again responds as expected to commands.
The common wisdom says that 30 paces should be the minimum range for this to happen. It is not an exact science, and you are presenting the system with what is hopefully a worst case scenario.

You may wish to go through this exercise again, having the plane held at some different orientations, such as nose up and pointed toward the transmitter, the transmitter antenna swung around to different orientations, etc. You may learn something!


By the way, I still notice folks doing a Range Test by walking out and wiggling the sticks around to see if stuff works. While that may sound good, unless you have the plane held by someone and call out the movements you are commanding, you are missing something. The controls may wiggle, but, do they jump around a little bit and do they wiggle in the intended direction? Control check is different from Range check - do both. Stand behind your plane, prior to every flight, and go through the controls to ensure that all is well. Many of us have been caught with reversed Ailerons (most common setup mistake) or something not properly seated in.

Stack the odds in your favour, this hobby has enough challenges already. Do your checks, Fly Safely and Have Fun!

5
General Discussion / Re: Pixhawk / Ardupilot and other autopilots
« on: May 18, 2020, 01:57:17 PM »
Adam Boffa may know about them. e flies and builds racing drones and is an IT guy, knows a lot about the flight controller technology.

6
General Discussion / Re: So who's building what?
« on: May 12, 2020, 04:26:58 PM »
That looks really nice, Dwayne.  I'm about to get started building my Veco Tomahawk so you can show me how to fly it once the field opens  ;)  .  In the meantime, I'm trying to finish my Bristol Blenheim/Bolingbroke, but, sad to say, it's RC, not CL... :'(

Steve


Looking good Steve, before you Start the Tomahawk  please PM me your phone number, I have something for you..  8) ;D



Steve, that looks terrific!

For when you get ready to do your radio setup:

Some time ago, I posted in here the safe way to set up twin engines in the Spektrum environment. It is based upon what Andy Kunz, head of Spektrum's development team, has stated, along with my slight modification. I have used this; it is 100% proven and safe.

There are ways in which folks have set up electric twins that are  not safe. I have even seen this at our field.

The proper way allows for, if desired, differential thrust. Don't discount the value of that, both in the air and on the ground.


Here is the post:
http://krcm.mywebnow.org/index.php?topic=1787.0


7
General Discussion / Re: So who's building what?
« on: April 26, 2020, 12:26:45 PM »
Wow! Ya got her tarted up real fine there, D.

Back in the day, she would've gotten the boys down at the Lakeview Manor very excited.

8
General Discussion / Re: Vortex Generators
« on: April 17, 2020, 08:45:04 AM »

9
General Discussion / Re: Hobby King and Federal Express
« on: April 15, 2020, 09:13:38 AM »
Your charge from FedEx is typical of them, also typical of Hobby King's approach.

On my last order (my very last, as I will never make that mistake again), HK had "free shipping". Except that, unexpectedly, it ended up in the hands of FexEx, which I never knowingly deal with due to past experience and who charged be a huge fee. "Brokerage fee" was part of it. UPS did the same thing to me some 25+ years ago on a motorcycle fairing, even when I had to drive over to their office to grab my package. Lesson learned with those guys! Once they have it in their hands, you have no choice but to pay up. Although, once of our former Members, once called their bluff, told them he wasn't paying the ransom and to return it to sender - they caved in and gave him his package. He was an OPP officer, so may even have "accidentally" uncovered his shield while talking with them?

Banggood, and some others, will give you an up front choice of shipping methods, along with an accurate estimate of the charge involved. I once had a plane on order from MotionRC, which had free shipping within USA. So, I set up a Kinek account. They phoned me a couple of days later and said that UPS could not deliver to that address. So, I cancelled the order and they refunded my money. Apparently, they have some kind of bulk deal with UPS for deliveries of certain sizes within USA, hence can offer "free" delivery. I suspect that UPS could find the Kinek (Thousand Islands location), right on their usual route if they wanted to, but then they would miss a chance to stick it to the purchaser for delivery fees. Most folks would probably give up, let them deliver to home and suck it up and pay. Not me! Fool me once, shame on you; fool me twice, shame on me.

Over here on the Rock, things that end up in UPS hands will sometimes just get dropped off at the ferry dock, awaiting the next boat for the crew to place the package(s) on board. Of course, no one would ever steal anything, right? Pretty shabby approach, especially for he fees they charge!

On the other hand, USPS and Canada Post have always been good to me. My packages get delivered, often right to my door, and have always been in "protective custody" by those folks.

10
Yes, Wilf, you really have snatched Victory from the jaws of Defeat! It is strange how often these things fly better after being "modified" than they flew right out of the box. Good job!

11
For those long days of being stuck inside, here is some very worthwhile reading. This is recognized as perhaps the most authoritative book out there on the subject of flying (full scale, that is). Got a question about some aspect of flying? - you should be able to find the answer in here.  Enjoy!

https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/phak/media/pilot_handbook.pdf

12
Plans, Projects, Building and Flying Tips / Re: The Warthog
« on: April 06, 2020, 04:36:46 PM »
As I was enjoying a cold Landshark Lager, I recalled the wing tube I had built for the Tele. I used a piece of aluminium lawn chair leg as the form and also as the eventual joiner tube, wrapped some wax paper onto it and then spiral wound a couple of layers of the fibre drywall tape over that. Then, I applied the glue to that. The drywall tape was ideal. The final tube slid off the form nicely. I never even bothered removing the wax paper completely, as the joiner tube slid firmly but easily in and out of the shell tube I had created, which was in turn glued into the wing at each of several inboard ribs. Very strong assembly.

Of course, I am very gentle with my toys

13
Plans, Projects, Building and Flying Tips / Re: The Warthog
« on: April 06, 2020, 12:17:39 PM »
You might try:

Find something to use as dowel. Wrap it with wax paper or cooking parchment paper. Or, as I did to make the Senior Telemaster wing tube, wrap it with a couple of layers of masking tape, which you will leave on.

Make some paper mache, perhaps grocery bag style paper, soaked in thinned carpenter's glue. Wrap it onto the dowel. Build up more material, if desired - thin glue with water, then thicken it up with talcum powder. Apply one or  more coats. It will sand nicely when dry and it should smell lovely! At least until the  motor goes up in flames following the crash! The part should slide off the dowel after it dries thoroughly.

If you had used toilet paper core, you could simply layer it up with or without the paper mache, just use thinned glue at first, followed by coats of the thinned glue rethickened with powder

14
General Discussion / Kingston med students' efforts!
« on: April 01, 2020, 02:27:50 PM »

15
General Discussion / Hobbyists helping the cause
« on: March 28, 2020, 09:06:41 AM »
There have been a number of media reports and videos regarding a worldwide effort to produce some of the critically needed medical items.

I forwarded one of the articles to several of our Members who I know have 3D printers. This was probably not news to them.

One of our Members (unnamed out of respect for his privacy) responded that he has been printing face shields for use by operating room staff at KGH, where such items are scarce. What a great thing to hear! Your note back turned our day around significantly!

There may be others amongst us who have the hardware capabilities to contribute to such efforts. (I don't, although I wish that I did). They may already be doing such work. It would be great to hear about, and to acknowledge, their efforts.

Around the country, and the world, there are libraries and educational institutions that are making available their 3D printers to contribute. There are some groups in our area doing this work at home or elsewhere.

One thing in common is that these individuals are donating their time and materials to this cause. Is there a way to help them, perhaps with the cost of materials?

To any of you folks who are producing such items, we would certainly like to hear of your efforts and/or whatever we can do to help. If you wish to remain anonymous, consider sending me an email outlining what you are doing. With your permission, I will post it as a quote with your name withheld, if you wish.

It is frustrating for many of us to have to sit back, isolated, and unable to directly contribute to such a cause. Knowing that some of our friends are able to do something makes life seem a lot better. Can we help them?

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