RE: Tip Stall
[quote]ORIGINAL: Bozarth [quote]ORIGINAL: Steve Steinbring ...at higher speeds called an accelerated stall where drag exceeds lift available.... [/quote] Not the normal definition of an accelerated stall. Normally it is defined as exceeding the critical angle of attack under a load greater than 1 g.... Steve
Posted on: 5/18/2013 12:14 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11515256

Tip Stall
After reading a good many posts here about [b][i]tip stall[/i][/b] there appears to be some misunderstanding of what really occurs, or what is thought to occur in such a stall. We all should know that there a number of factors that can be involved to cause the [b]tip stall[/b] often called a snap which most often occurs when our models are on approach, or a turn to final. There are also other regimes of flight where the same can occur even at higher speeds called an accelerated stall where drag exceeds lift available. Stalls can and will occur in very high G turns at any airspeed at any aircraft attitude. Since there are many factors in stalls here are some thoughts with a link to provide additional information which should give you more insight into the aerodynamic principles involved. With that said........... If you are making a level turn to final approach as the angle of bank increases so does the "G" loading on the airplane requiring more lift to support flight. A [b]level 45 degree turn has a loading of 1.41 G's, or a level 60 degree turn - 2 G's [/b]. This means if your airplane weighs 10 pounds in a 60 degree bank the wing now has to support 20 pounds of effective weight with requires more airspeed in order to support the induced weight. If your airplane gets too slow in the turn a stall will occur and [b] if the upper wing stalls first[/b] a snap like action will occur when the lower wing (still flying) goes over the top. The same can happen if your airplane gets too slow on an essentially straight in approach if one wing stalls before the other causing the stall not to be straight ahead. Since we do not have the advantage of being inside the aircraft with a method of knowing if the airplane is in coordinated flight one wing will most often stall first. Here is a link with a lot of good information to review there is a lot of good information that may save you a crash. http://selair.selkirk.bc.ca/Training/Aerodynamics/turns.htm
Posted on: 5/18/2013 5:43 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11515045

RE: New to e-power flying? Get the low down in here from experienced e-power RC pilots!
A nice E-trainer is the "Apprentice" made out of foam and flies very well. I have instructed a couple of students using that airplane with good success. Flies pretty slow with all the essential flight controls being ailerons, rudder, and elevator. One day the weather was just right that I was able to thermal the Apprentice like one of my gliders. A fun airplane.
Posted on: 8/7/2012 4:32 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11183979

RE: New Guy
Good advice in joining a club and having an instructor! It will save you a lot of time becoming a proficient pilot and make the hobby more fun.[:)]
Posted on: 7/25/2012 4:38 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11168345

RE: Hobbico Avistar a Performer?
Yes a larger engine will give you more takeoff performance! But is it going to make it a different airplane not really, it is still a trainer with or without dihedral. The wing has a high lift airfoil (flat bottom) which somewhat limits aerobatic capabilities. You can go through a lot of trouble trying to modify the airplane to improve its characteristics...... but IMO its wasted $$$$ and effort. The Avistar is a good airplane a nice trainer, but it is what it is! The .40 LA teaches you to better fly the wing vs. flying an overpowered thrust vectored airplane making you a better pilot in the end. I would go ahead and purchase your choice of a more advanced airplane/engine and keep the Avistar as it is! Everyone should have a trainer in their hanger IMO, there is something nice about relaxing flying with a trainer, good for buddy cording friends, or just doing touch and go's when the mood suits you. Welcome back! [:D]
Posted on: 7/25/2012 4:30 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11168342

RE: Scale Glider
Beautiful airplane for sure! How is it available with the approximate cost?
Posted on: 7/11/2012 12:55 PM by Author "Steve Steinbring" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=11151628

RE: How do I fix a warped EPO foam tail fin?
[quote]ORIGINAL: aeajr In wood?  Really?  Have not tried that, but frankly I don't fly much in traditional balsa aircraft.  Most of my planes are foam, pure composites or high end wood with carbon spars and carbon rib caps. [/quote] Yes, its the same technique you steam the wood using an iron and a damp cloth/paper towel being sure to not let the cloth get too dry. Repeated short applications work well. The process expands the wood cells removing the dent. I have used the method on models, furniture, and gun stocks with good success.
Posted on: 7/7/2012 5:37 AM by Author "Steve Steinbring" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=11146279

RE: How do I fix a warped EPO foam tail fin?
aeajr, Thank you for the info it will come in handy. I have used a similar technique removing dents in wood. Steve
Posted on: 7/4/2012 1:05 PM by Author "Steve Steinbring" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=11142929

RE: reverse pitch props....(folding)
I am sure you want a folding prop that has forward thrust. Reversing the pitch would be reversing the thrust. Try Graves R/C in Orlando FL they are well stocked and should have what you need. www.gravesrc.com
Posted on: 7/4/2012 12:50 PM by Author "Steve Steinbring" in the forum "RC Gliders, Sailplanes and Slope Soaring"
http://www.rcuniverse.com/forum/fb.asp?m=11142915

RE: Transmitter tray?
I just finished up a rather senior student who like your student was a bit unsteady just holding the box. The tray allowed him with the combo of a certain amount of expo to make more pure control inputs. I find the tray a very useful tool instructing, and use one myself when flying pattern.
Posted on: 7/2/2012 5:00 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11139581

RE: Futaba gold series FM
Just make sure that your battery is good. I still fly 72 on occasion nothing wrong with it, other than having to remember to pull the antenna up after flying so much 2.4. [;)]
Posted on: 7/1/2012 2:07 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11138863

RE: dx5e Buddy box
for the next winter season sometime soon! [:)] All the best, Steve
Posted on: 6/30/2012 1:38 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11137861

RE: How to handle the guys with flawed plans?
I only instruct on the cord, passing the box at altitude is OK, a few AWE Shucks High! Even then there can be problems if the student panics and doesn't want to give up the box easily. In the critical phases of flight there is just not enough time to respond passing the box. When down and low one can never predict what a student will do. I've had them roll the airplane inverted on a go-around, dive the airplane on short final, and other unexpected thrills for me to recover. Years ago and even now some folks still instruct by passing the box, hardly as reliable as the cord bar none!
Posted on: 6/28/2012 1:32 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11135401

RE: How to handle the guys with flawed plans?
Nitro, I have had students that listen on the ground, but have trouble once the airplane is up. They are concentrating so hard that at times I can't get a response from them on things like the transferring of control. In effect they develop a form of tunnel vision and thought. In these cases I try to work on one issue at a time. Its difficult at times to identify exactly what they are missing, and develop an approach where things click for them.
Posted on: 6/28/2012 7:14 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11135009

RE: How to handle the guys with flawed plans?
[quote]ORIGINAL: CGRetired [quote]ORIGINAL: Steve Steinbring United Pilot! Foxtrot, Sierra, Hotel Well said! [:D] [/quote] Hey Steve.. How goes it? You guys dried out yet? Jeez, I hope Manatee County floats!! BTW, Fox Sierra, Hotel.. is that something like Alpha Mike Foxtrot? [:D] CGr [/quote] Ya, something like that! Pretty wet down here in the land of sunshine. The west coast has been getting
Posted on: 6/26/2012 5:52 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11133088

RE: How to handle the guys with flawed plans?
United Pilot! Foxtrot, Sierra, Hotel Well said! [:D]
Posted on: 6/25/2012 1:22 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11131445

RE: How to handle the guys with flawed plans?
[u]Jester s1[/u], There all levels in this hobby! What people purchase is simply up to them based upon their experience, their interest, and personal budget. IMO its not up to me to judge others on those issues. Yes, a lot of that merchandise is of really questionable quality meant to catch the interest of people ignorant to the hobby. As an instructor I do advise what new pilots should purchase for their first airplane, which would be a decent trainer. Whether or not that advise is followed is up to them. Most people step up in the quality of their aircraft once they get themselves familiar and grounded in the hobby. Personally I have a hanger full of what you call "hobby grade" aircraft some are sport fliers, gliders, pattern birds, couple of trainers, scale birds, and so forth. But, I get just as much enjoyment out of flying my Micro T-28 from Parkzone a cheap airplane one might call a novelty. IMO the cost is not necessarily what its all about, to each their own as long as it is safe.
Posted on: 6/25/2012 5:57 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11130791

RE: How to handle the guys with flawed plans?
Hanger 9 makes the P-51 MKII which is a standoff scale airplane that comes with leading edge devices and flaps set to a point where it slows the airplane down to be a trainer. The idea is that you can later remove the leading edge devices clean up the flaps and you now have a sport standoff P-51 to fly. I've instructed a few students with that airplane, its OK as a trainer but IMO its not the best choice. Trying to do too much with one airplane. Its kind like recognizing that both a canoe and an ocean liner are each boats, but neither of them will do exactly what the other will effectively. Once all is said and done the MKII cleans up into a pretty nice little sport flier.
Posted on: 6/24/2012 12:01 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11129928

RE: How to handle the guys with flawed plans?
[quote]ORIGINAL: lopflyers What?? I didn't know they are planes that comes in a teach yourself to fly, box. Preposterous. To do a couple of laps and land successfully doesn't mean you know our hobby. [/quote] NO! But its a start! If you take a look in the hobby shops there are RTF airplanes that are being sold mostly low end that approach people to get into the hobby. The box often says something to the effect "Learn to fly R/C". Most of these are park fliers sold at inexpensive price points making them very affordable entry points or gifts. Just look at the number of coax helis that are out there really cheap to purchase. I only wish that things would have been as inexpensive as they have become when I started modeling. I purchased a little airplane for my grandson at Harbor Freight one day for about $30 when he was about five. A very simple airplane "The Yellow Bee" setup with two pusher props controlled by differential power for steering nothing else, one stick for a throttle, the other controls the differential of thrust between the motors basically an inefficient plastic powered glider. It flies OK, pretty bulletproof, but not the best for sure. But, you know what he has had fun! He is now seven I'm buddy boxing him on one of my gliders. He is also flying the simulator, and will soon be on the cord with a trainer. So its not all bad because there is a real need for more people (especially the younger group) to become interested in our hobby for it to remain healthy and survive.
Posted on: 6/24/2012 8:12 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11129754

RE: How to handle the guys with flawed plans?
bogbeagle, Your make some good points! One thing about this hobby is that there is something for everyone. Many pilots will never go much further than their trainers while others go on to flying pattern, scale, 3-D, IMAC, and some guys just like to build. I think success is measured in being happy in your own skin with whatever level or direction you choose to take in our hobby. Back to the original question a few things which I didn't address before: A great deal of the problem comes from ignorance about R/C. For many Newbies having never flown R/C standing at the side it appears that there would not be that much difficultly from their prospective in mastering what appears to be a toy airplane that they see flying. This is often especially true if someone has flown full scale airplanes, as they feel they already have a handle on it. It is up to the instructors and others to educate them, and if they can't be convinced then let the cards fall where they may. However, it won't be at our field due to the inherent dangers involved. Safety is the main concern in our training program and in that program we want someone to a least crash safely, so there are rules.
Posted on: 6/24/2012 4:36 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11129573

RE: How to handle the guys with flawed plans?
Interesting thread! I'm a club instructor who was self taught at a time before simulators or when buddy cords were common. I do have some empathy for those who want to try it on their own, but that can be a hard road and expensive. I used to takeoff, get up really high fly until the fuel ran out, then make a landing (more of a controlled crash) in any direction possible hopefully without damaging the airplane. The thought of lining up with any kind of a runway wasn't within my skill set, or even much considered. Growing up I flew U-Control, and free flight there were no ARF's, we all built kits so I knew how to repair damages, so it kept me in the game. I flew as an outlaw until the local hobby shop told me about a club. Once I joined a club my flying really improved! I gained a lot of knowledge quickly from folks who were more than willing to share their experience. I had been a member of the AMA back in the U-Control days, so I was at least familiar and willing to re-join. As an instructor you get all kinds of students with varying degrees of aviation knowledge. I don't mind someone who has flown full scale before. At least they have an idea of how an airplane flies, many students come to the field with no idea of the principles of flight, nor are they too interested in learning at first. If a full scale pilot student is a bit too cocky usually it isn't too long before they figure out that their not sitting in a cockpit with instrumentation. They learn pretty quickly that this game is mostly all eye hand coordination, and there will definitely be a learning curve. It mostly only takes the first flight to trim their ego to where they start to listen. If necessary I go a step further and confess that I'm a retired Air Force pilot which usually quiets the full scale boasting. Hopefully then we can get down to business of teaching them to fly R/C. Some students catch on really quick and others take a good while. I finally finished up with a retired doctor who is now in his early eighties, it took several years to get him to the point where he is safe. I'll stick with a student as long as they are willing to learn, and show up at the field at the appointed time. If they stand me up, or arrive late then I have better things to do with my time. If someone can't be respectful enough to appreciate the knowledge I giving to them for free, then there is most likely a parting of our ways. They can find someone else who is willing to put up with them. I have divided feelings about simulators at times. The simulator can be a great aid if it is used properly. But it can also develop some really poor habits at the same time. I usually try to assign some homework on the simulator if the student has one. Hopefully they take the time to practice what I've asked flying an airplane similar to their trainer. I try temper their urges to fly all the more advanced airplanes on the sim. There isn't a reset button on their model, and a lot of the freestyle simulator time can result in negative training. There are a number of things that are problematic for instructors IMO; at least for me. One - all the different types of radios we have to deal with especially the programmable. The programming is different between radio brands with each of the companies having numerous models, with features constantly changing. A lot of time has to be spent studying manuals to learn how to properly program. Flying analog is so much easier in many ways. Two - A new student shows up at the field with his/her new airplane wanting to fly, but the airplane is not airworthy. Our clubs position is that the student should present an airworthy bird to the instructor. Since the student most often has no modeling experience I often find myself taking the airplane and radio home to correct the issues to make it airworthy. Ending up with hours of time (at our club we aren't allowed to charge) to just make their first flight. It would be nice if they all had the knowledge, but its the exact reason why they come for instruction. Three - I am not a baby sitting service! Mom or Dad will not leave the field not to return for hours on end, where I am left with the custody of someone's child. When the lesson is over I want to either fly for myself, or leave. Four- Just because I am at the field does not always mean I am there to instruct at all times. I need time to fly for myself sometimes its hard for the student to understand that. My students are always my students and when they need more advance training I'm there again for them. I try to impress on them after solo to stay with their trainer for awhile practicing what they have learned before stepping up to a more advanced airplane. I usually will fly an aerobatic sequence with their trainer to show them there is still much more that can be learned with their trainer before moving on. Overall it is very rewarding seeing someone come into the hobby, be successful, and enjoy all that R/C airplanes and their club has to offer. [:)]
Posted on: 6/23/2012 9:12 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11129371

RE: Help me identify a plane I inherited in 1997
John, I competed in just one SPA event that we had at our club. It was my first pattern event ever I ended up second in Novice class. The biggest difference is that there are no turnaround maneuvers scored in Senior Pattern. So the airplanes pretty much rip down the field doing the maneuver pretty much on center. Then perform whatever turn around you want to return for the next one maneuver in the sequence. Some of the older design pattern birds are pretty quick with tune pipes and retracts................. it was good fun![;)]
Posted on: 5/12/2012 12:24 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11078145

RE: Advice before I fly a warbird with landing gear
Sherv, Hydro Junkie makes some good points about an instructor, if one is available. As I posted above take it one step at a time, learn to fly the basic airplane without the complexity of all the new whistles and bells. Add a new feature one at a time, because it is a different game. Allow yourself time to get some familiarity with retracts before adding flaps to the mix. Don't get too over confident in just a few passes. Personally, I don't feel there is too much need for flaps, retracts, and spoilers with models; unless its scale or a glider. As an instructor at our club, I do have occasions to instruct the flying of a more complicated airplane. What I described above is pretty much how I approach it.
Posted on: 5/10/2012 2:03 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11076145

RE: Advice before I fly a warbird with landing gear
Sherv, I don't see any reason you can't fly the Skyraider if your able to successfully fly low level inverted passes. The thing about a warbird is that you have to fly them on to the runway when landing. The wing loading is generally higher which means that the stall speed with be higher as well. They don't float like a high wing trainer. Retract gear although fun is always a problem for the most part. The gear can not stand much side load on landing it tends to bend the hardware which becomes a maintenance problem. For the first couple of flights or so fly the airplane gear down to get used to it. Once your ready to use the retracts its a good idea to cycle the gear at pattern altitude to get use to how the airplane reacts when the gear is either retracted or extended. There will a difference in the amount of drag and if I'm correct the gear seems to retract aft which may slightly change the CG. If you have flaps you will also have to get familiar with how the airplane reacts when they are either retracted or lowered. Do some familiarity flying at a safe altitude, you can expect to have to re-trim the airplane. If you have a TX with mix capability you can program in for the resulting changes of configuration of gear and flap extensions. Expect to fly a configuration pattern before making your approach to landing. Take it slow get used to one feature at a time, and have FUN!
Posted on: 5/7/2012 6:28 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11071356

RE: Minnflyer (AKA Mike Buzzeo) has unexpectedly passed away
In your honored memory Mike, [size=3][b]High Flight[/b][/size] By John Gillespie Magee, Jr. "Oh, I have slipped the surly bonds of earth, And danced the skies on laughter-silvered wings; Sunward I've climbed and joined the tumbling mirth of sun-split clouds - and done a hundred things You have not dreamed of - wheeled and soared and swung high in the sunlit silence. Hovering there I've chased the shouting wind along and flung my eager craft through footless halls of air. "Up, up the long delirious burning blue I've topped the wind-swept heights with easy grace, where never lark, or even eagle, flew; and, while with silent, lifting mind I've trod the high untrespassed sanctity of space, put out my hand and touched the face of God." [b][/b]
Posted on: 4/15/2012 8:23 AM by Author "Steve Steinbring" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11042689

RE: general Safety
Excellent post! Without a doubt safety should be the first concern of everyone in this hobby. I wear a 7" scar on my left leg calf from a runway airplane in the pits one day at the club field. The danger is there and everything possible should be done to keep things safe.
Posted on: 3/22/2012 4:30 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11011103

RE: New plane
ARFS. Welcome back! If I can help you send me a PM. Steve
Posted on: 3/20/2012 2:09 PM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11008620

RE: low NiCd capacity
I too cycle my new NI-Cd batteries to break them in. When finishing the initial cycling I record the mah and the date on the individual battery using a permanent marker. In doing this I can see how the battery progresses through its usage. I consider a battery bad when it reaches 70% of its rated potential. Batteries need maintenance meaning that they need to be kept charged and cycled on a regular schedule. Allowing a battery to sit and pretty much totally discharge for extended periods of time diminishes the life of the battery.
Posted on: 3/15/2012 9:09 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=11001077

RE: Dx7s flapperons - Incorrect travel
add more. Steve
Posted on: 3/12/2012 6:09 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=10996687

RE: Dx7s flapperons - Incorrect travel
how to solve. Steve
Posted on: 3/10/2012 6:35 AM by Author "Steve Steinbring" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=10994033