RE: 2013 ARGENTINEAN NAT'S
Mario, Thank you for posting the link. It is always interesting to see what is going on in different countries. I was born and raised in Peru (although I have been living in the US since '84) so I am always curious to see what is going on in South America. Teo
Posted on: 6/15/2013 1:59 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11544160

RE: Accurate Small scale WWl warplane kits
You can also check: www.manzanolaser.com The carry a variety of Peter Rake designs. Conceptually, the construction techniques are very similar to what aerodrome offers. In all instances, these smaller planes are meant to be electric powered. Good luck, Teo
Posted on: 5/27/2013 1:27 PM by Author "viva_peru" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11524634

RE: EIII Restoration
I think that a -2 degree incidence (leading edge low) on the stabilator means that he is probably flying with quite a bit of up trim. In normal trim, most planes fly with the stab and elevator generating a downward force. For the stabilator to do that, it would need negative incidence relative to the wing. The 3 degree difference between the wing and stab is significant but maybe not unusual for a plane with such a small stab. Also, your trim changes with speed and it could be that this particular model is more sensitive to it than others helping mask the effect of the engine down thrust. I would say that some down thrust and a little right thrust would be a good thing to have. Teo
Posted on: 5/16/2013 6:38 PM by Author "viva_peru" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11513748

RE: EIII Restoration
I have been following this thread for the past few days. The plane is too nice to be relegated to the status of a hangar queen. My first hunch upon reviewing the symptoms is that the stabilator (flying stab) is too small for the plane. I whole heartly agree with what TFF wrote. The fact that the stabilator is set at -2 degrees might be an indication that the stab is too small: it needs significant deflection in order to generate the downward force needed for level flight. Since the plane has a relatively long tail moment I would be tempted to shift the CG back a little and see how it flies. Regarding the pitch sensitivity it could be an issue with the amount of travel available. In general, a stabilator is more effective than a normal stab and elevator and hence it needs less movement to achieve the same result. Most airfoils stall at about +/- 15 degrees for the angle of attack, so I would use that as a guide to set the travel for the stabilator. In some of the photos, you can see it deflected significantly during landing; I wonder if you can reach a point at which the stab stalls and you no longer have the power to raise the nose. This could also be confused with the main wing stalling. Maybe blipping the power during the approach would help smooth things out a little. If you get really desperate, I would pose the question on the Pattern forum and see what those guys suggest. They certainly know how to trim an airplane properly. Good luck and don't give up on the nice looking plane. Teo
Posted on: 5/16/2013 3:09 PM by Author "viva_peru" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11513404

RE: My First Pattern Video
Very nice. Did you go throught the steps of Sportmans, etc, Master and then FAI? Or straight into FAI?
Posted on: 9/9/2012 1:45 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11222959

Deans vs. bullets for the battery
Hello, I currently putting together a 2M Vanquish and I am wondering if I should continue to use deans (as in all of my other planes) or change over to bullets (4.5 mm or 5.0 mm) for the battery to controller connection. My most power hungry plane draws about 65 amps and I have been using deans without any issues but I am wondering if I would be better off using bullets. Also, with bullets, it would be pretty easy to hook up two packs in series without having to rely on an additional adapter. Any thoughts? If I were to go with bullets, is there a convention regarding male/female and +/-? Thanks, Teo
Posted on: 8/28/2012 7:28 AM by Author "viva_peru" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11208912

RE: St Clairsville Wrap Up
Great report Scott. It looks like you guys had a very nice contest. Sorry to hear about the airplanes lost, it seems that Bill has had some bad luck as of late. Teo
Posted on: 8/27/2012 12:51 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11207965

RE: St Clairsville Pattern
Hi Scott, Me too. I kept thinking about going up until the last minute, but decided that the nearly 6 hr drive was a bit much. As it turns out, I also had to spend some time at work over the weekend so it just did not work out. We had a very nice weekend here in Michigan, I assume you did as well. I am trying to see if I can make Peter's contest in a few weeks, as it turns out, I have a conflict on Saturday. We will see. Take care, Teo
Posted on: 8/27/2012 6:43 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11207444

RE: St Clairsville Pattern
Hello Guys, Any photos or contest results? Teo
Posted on: 8/27/2012 4:59 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11207354

RE: Desafio II center of gravity - Help!
Bill, I would also post the question on the classic forum, someone might know the answer. I just purchased a Summit III kit from Jim which will be my winter building project. Good to see some of these old planes coming back. If the calculators are giving conflicting answers, you could always start out with the most forward CG position that they recommend and start trimming from there. Good luck, Teo
Posted on: 8/20/2012 4:43 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11199458

RE: Weak Signals Precision Aerobatics Contest
I have been granted clearance so I will also be coming along. This year has been a good year for Michigan contests, 3 within an hours drive. Teo
Posted on: 8/7/2012 5:49 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11184867

RE: F3A Results - SPOILER
Interesting if not espirited discussion.... Regarding electric motors, based on what I know, the design of the motor is a comprimise between desired torque and speed. In essence, if you want torque at low speeds you sacrifie the high end RPM and vice-versa. The deeply geared set-up favor a motor which generates little torque but which can develop high RMP. It would not be hard to imagine that in a system such as this there would be lag in the response given that the motor has to overcome the inertia of the gear system/prop in addition to the aerodynamic loads acting on the prop. Maybe someone who really understands electric motors could chime in. The other thing to keep in mind is that in order for a Theory to be useful, it only needs to be able to predict an outcome realiably, given an input. Whether the theory itself is correct or not does not play into its usefulness. I suspect that there is a little bit of truth in much of what has been said, but I doubt anyone person is 100% regarding the reason why things work the way they do. I just take note of what seems to work and try not to think too much about it...
Posted on: 8/7/2012 1:11 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11184571

RE: Linear vs. switch mode voltage regulator
Jim, Thank you for the info. I think that I will go ahead and order a linear regulator. Teo
Posted on: 7/11/2012 5:42 AM by Author "viva_peru" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11151154

RE: Linear vs. switch mode voltage regulator
Thanks for the information. For the linear regulator, I was looking at the Jaccio which is rated at 5 amps. Although labeled as a 6v regulator, I believe its actual running voltage is 5.7 volts. The 2S lithium pack should nominally provide 7.4 volts under load, so I believe that I have adequate overhead. I have several of the 10 amp Castle BECs, so I will have to take a look at the specs to see how much overhead it needs. I suspect that I should be OK. It seems to me that most people are using linear regulators, so maybe I will try the Jaccio. From what I have read, a 5 amp regulator is adequate for pattern specially if using electric power rather than IC (no vibration for the servos to contend with). Thanks, Teo
Posted on: 7/10/2012 5:58 PM by Author "viva_peru" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11150659

Linear vs. switch mode voltage regulator
Hello, I am currently putting together a 2M Vanquish and I was wondering why it seems people prefer the linear voltage regulators rather than the switching regulators. I have been using the Castle BEC on my .60 sized planes (off the main powerpack) without any issues. In the case of the Vanquish, I intend to use a 2S lipo regulated to 6V to power the radio system. I am aware that the switching regulator will generate a ripple but I am wondering if it is significant enough to be noticed. Thanks, Teo
Posted on: 7/10/2012 7:42 AM by Author "viva_peru" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=11149899

RE: First Annual East Wings Precision Aerobatics Competition
Hi Joe, Gald to see that you are coming. I am not sure of how many pilots will be attending, so the more, the merrier. I am jealous as well, I just placed an order for a 2M Vanquish. Had I know that there was an Integral in the area, I would have gone for it. Good choice. Teo
Posted on: 6/22/2012 4:21 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11128182

RE: D-4 NATS Tune-up
Hello Matt, Given that I only live about 50 minutes away, I am planning on attending. I have been trying to convince a couple of the guys in my club to go just for the fun of it, but unfortunately, so far, I have gotten no takers. Teo
Posted on: 6/17/2012 6:12 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11121739

RE: Ideas for an intro pattern class
Hello, My club just had a 2-day IMAC clinic a few weeks ago. About 12 pilots participated and we actually had a couple that came from out of town. The first day covered what IMAC is and isn't in addition to having an abreviated judging seminar. The idea behind the seminar was to help people learn how to read Aresti as well as giving them a few pointers about what judges are typically looking for. The afternoon was spent "judging" a few flights from experienced pilots. The demos were also intended to help people visualize the sequences. The following day, we had a mini-contest as well as a general trimming session for anyone one who needed help with their plane. In the end, I think it worked out quite well, although personally I think it would have been better to have a one day event rather than a two day event. I think that for most pilots, the most useful aspect of the event was to get a chance to fly in-front of the judges and the tips they received after their flights. In addition, some took advantage of the opportunity to have an experienced pilot help them trim their plane. I am pretty sure that something similar could be done for pattern. Right now, in our club, we have 4 or 5 people who are interesting in competing, although mostly in IMAC. I am the only pattern flyer at this time, and a newbie at that. Teo
Posted on: 6/13/2012 5:30 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11116563

RE: Coupling question
Hello Joe, I was just curious if the plane that got this discussion started is the Aeroworks Yak. I have been thinking about getting one. Thanks, Teo
Posted on: 6/7/2012 5:29 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11109806

RE: D-4 NATS Tune-up
Hello guys, It looks like I will be able to make it provided that work does not throw me a curve ball this week. I will be flying Intermediate. Teo
Posted on: 6/5/2012 4:35 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11106640

RE: Venus II
Tele, That is a very nice looking Venus. It makes you wonder why Great Planes does not continue tweaking their designs after they have been in production to make them look more current. It would seem to me that minor changes such as these would allow them to keep producing the plane without having to introduce a completely new design as a replacement (which as far as I know, they have not done...). Have you decided what contests you will attend this year? I am thinking that I might get a chance to see the plane in person. Teo
Posted on: 5/22/2012 4:49 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11090110

RE: My suggestion to increase pattern participation
Dana, You are probably right. I have been told more than once that I fly a little too fast. So many times I feel rushed trying to keep everything within the box. Flying further out makes the box bigger and easier to manage, but as you mentioned, the planes get small in a hurry. I had forgotten about that. I am now forcing myself to slow down so that I don't feel so rushed, but it has not been easy. Teo
Posted on: 4/27/2012 2:34 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11059385

RE: 1st Annual Bakersfield D7 Spring Pattern Bash
Hello, Hopefully some one will be able to post a few photos. I am really curious to see some of the classic planes. Teo
Posted on: 4/27/2012 2:17 PM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11059362

RE: My suggestion to increase pattern participation
Dana, The simple answer to your question is that in the pre-turn around era, you made one manuever per pass. In essence, set your pass up, perform the manuever, execute some kind of non judged turnaround to perform the next pass and manuever. Not having to worry about the box I believe makes it a little easier since you have more time to set-up the plane for each maneuver. Personally, I am not sure why having the turn around manuevers in Sportsman is such an issue. I flew my first competition with maybe 20 practice flights without any coaching and it went O.K. I actually got quite a bit of help regarding manuever shapes and placement from my callers and judges. I know that I probably exited the box a few times unintentionally but I guess that it was overlooked ("soft judging?"). I believe the judging was more focused on the shape of the manuevers themselves. In intermediate, I believe the judging is a little more strict regarding the box. Teo
Posted on: 4/27/2012 11:32 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11059215

RE: My suggestion to increase pattern participation
Interesting discussion. I only flew Sportsman for one season before moving into Intermediate the following season. It was probably a bigger step than I anticipated, but my measure of success was pretty simple, try not to come in last. So far, I have only partially successful and I fine with it. At any rate, my first foray into pattern was with a somewhat underpowered Extra 330 S. The plane would fly the sequence well, except for the vertical upline; however, if I kept it short (say 100 ft for the straight segment) the plane managed OK. I never felt that the turn around maneuvers were particularly power hungry so I am not sure about the comment regarding the tall turn around maneuvers. In order to make the Sportsman sequence more accesible, maybe the sequence should be flown with a normal sport plane (ie Kaos 40, a SIG 4*40, or something similar) before the sequence is decided upon by the NSRCA. I have been "helping"a few of the guys in my club start flying sequences (IMAC). One of the biggest issues I have seen seems to be power management. Either they fly with the throttle full forward all of the time or they start the manuever before bringing the power up, thus running out of steam. This could be a reason why the planes appear underpowered. Maybe, as part of a contest, an informal training session could be held on the Friday night before the contest to give the Sportsman pilots a few tips. Teo
Posted on: 4/25/2012 7:20 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11055989

RE: My suggestion to increase pattern participation
Hello guys, My club is going to have an IMAC intro seminar in May and there seems to be a fair amount of interest in it (maybe around 10 pilots or so). In essence, it will be spread over two days: first day, a little class room time learning about Aresti, the sequences and what IMAC is. In the afternoon, we head out to the field for demo flights and a triming session. We have a really experienced IMAC pilot (IMAC ex-president) and he will be helping the other members trim the airplanes so that they are easier to fly. For most people, this will probably be the most useful part. On Sunday, we will have a mini contest or at least scored flights. We are encourging people from other clubs as well and we have made arrangements with another local club to allow "displaced" pilots to fly at their field as guests. My club should get quite a bit of credit for willing to do this. Now, having said that, maybe something similar could de done for pattern. I also think that Anthony's suggestion was a good one, we should have video of the sequences posted at the NSRCA site. The judging guides are nice to have, but if you are completely new, the videos are probably a bigger help. Teo
Posted on: 4/22/2012 9:36 AM by Author "viva_peru" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11052199

RE: Eureka's Baby Curare Build
Hello guys, The wings on the baby pattern kits are actually of foam core construction and hence the weight when sheeted with 1/16 balsa. The tail feathers are 1/8 balsa and seem adequate for the job once I added 1/18 hard balsa "spars". This was particularly necessary for the fin and rudder. I am not shooting to have a guided missle with this plane. Maybe more like a cruise missle... I will be using the 1020 KV version of the Park 480 with a 10x8 or 11x8 prop. With the 11x8 prop, I believe power will be in the neighborhood of 300 watts or so. I think that the pitch speeds fall somewhere between 65 and 75 mph. My guess is that on the low end, it wil be a 60 mph bird and on the high end around 70 mph. For something this small, that should be more than enough. The biggest advantage of the bigger props is better acceleration if needed and vertical performance. We will see. Teo
Posted on: 4/19/2012 4:53 AM by Author "viva_peru" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11048262

RE: Eureka's Baby Curare Build
David, Thank you for the compliment. I have read through your Picorare and Nanorare threads and I was impressed at the weight you were able to achieve even with a fully contoured stab. On the Curare, the wing is probably much stronger than it needs to be. If I were to do it again, I would have used 1/32 sheeting rather than 1/16. The wing alone is about 8 oz, covered and with servos, but missing the linkages. Teo
Posted on: 4/18/2012 1:27 PM by Author "viva_peru" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11047496

Eureka's Baby Curare Build
Hello, Late in 2010 I bought one of mini pattern kits offered by Eureka aircraft. By nature, I am a slow builder and I have been working on the plane on and off since then (probably more off than on....). At any rate, the kit is starting to look like a plane so I decided to post a few photos. I did start a build thread at the time, but it seems to have disappeared so I don't have any photos of the early build. Although intended for .20 sized glow engine, I am building it as an electric plane. My intent is to use an E-Flite Park 480 and if I am able to keep the weight to around 30 oz I think that I will be in good shape. The other major modification is that it will be built as a taildragger, but with the landing gear mounted in the fuselage in order to save a little weight. As shown in the photos, the plane weighs in at 12.5 oz, including the 2 aileron servos. Also, neither the cowling or canopy have been hollowed out yet, so it should be a little lighter. Teo
Posted on: 4/18/2012 11:29 AM by Author "viva_peru" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11047350

RE: Summit 120: Specs?
David, I did ask Jim about the specs and he told me that he would look them up for me. I don't think he has them comitted to memory yet. In the meantime, being a little impatient, I though I would just post the question in case some one knew the answer. Thanks, Teo
Posted on: 3/9/2012 5:44 AM by Author "viva_peru" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=10992713