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Birgir

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  1. Birgir
    Hi everyone. It’s now almost a year since my last post here, where I talked about my hopes that the Bleriot would be airborne again this season. I’m sorry to say that I used all the limited time of good weather here in Iceland to try to master the flying of my biplane, Sig Hog Bipe, with limited results. On windy days I however managed to make some more videos looking closer at some aspects of my Bleriot XI model. Here below is a video where I take a closer look at the stabilizer. You can also go to my YouTube channel and have a look at all my Bleriot videos at the Bleriot playlist. At present I ‘m collecting as many subscribers as I can and will be thankful if you could use this opportunity to subscribe to my YouTube channel. Thanks, Birgir.
  2. Birgir
    Hi there. Now I‘ve managed to test my new setup with a thicker window pane and an exhaust extension. The autumn is coming here in Iceland and the cold northerly winds are blowing. 6 – 7 m/s from north i.e. off shore wind is perhaps not the best situation for a test. Our airfield is very close to the shore as you can see on the video above and it is the North Atlantic Ocean. Well, the take-off was very steep but soon I got control of the model and started playing in the wind trying to get our windsock on camera. After a few minutes the engine started to sound a little strange and I wondered if that was because my new fuel had a little more oil than what I used to use. Suddenly all went quiet – dead engine. My Sig Hog Bipe is not a floater. Luckily the model was in the northern part of my flying envelop but there was quite some distance to the landing strip. I tried to gain speed by pointing the nose a bit down and turning into the wind, but the wind was to much – when turning, the inner wing lost the lift, and I couldn’t do anything but listen to the all too familiar sound of balsa breaking on a nearby football pitch. The theory is that the exhaust extension caused the motor to overheat and stop. As can be seen on the still below the extension did not solve the oil problem anyway and on top of that my camera was not on video but time laps stills. The only success was that I did not loose the camera to the Atlantic Ocean and the model can most likely be fixed. B.
  3. Birgir
    To solve the Castor oil problem for my pilot I ‘ve added an exhaust pipe extension made from an electrical conduit. I have bench tested it and it seems not to have too much effect on the running of the engine. I have not yet done an inflight testing but will do so at the first opportunity. I wonder if anyone here has the knowledge to calculate the resistance of the extension and do an educated guess about the outcome. The measurements are: The cross-section of the end of the muffler output is 50 square mm. The cross-section of the extension pipe is 133 square mm, i.e., 2.64 times the muffler. The length of the extension is 320 mm. B.
  4. Birgir
    This is my first video from a GoPro 7 on board Sig Hog Bipe. Obviously I must do something about the exhaust 🙂 B.
  5. Birgir
    Hello again dear friends It is now seven years since I built the Bleriot XI model and time to inspect the landing gear. So, I cleaned it up and put in new rubber bands. Hopefully she will get airborne again in the new year. Best wishes, Birgir
  6. Birgir
    Next month it will be 50 years since my dad gave me a Keil Kraft Mini Super kit for a birthday present. To celebrate that I took it down from the garage ceiling, gave it new rubber bands and took it to the field. Originally the model was said to need two or three channels: engine, rudder and maybe also an elevator. Me and my dad built it for three channels. Later I added ailerons, steerable nose wheel and enlarged the rudder a bit and after that it became a very nice, easy to fly little model.
  7. Birgir
    Hi My oldest model was built in 1973 by me and my father. It’s a Keil Kraft Mini Super kit. It has of course had a few updates and rebuilds but I have already flown it three times this spring More info about that model can be seen on http://flugmodel.weebly.com Birgir
  8. Birgir
    Hi everyone I came across this old thread when practicing in the new forum so I decided to post my first post in the new forum here. The Somethin‘ Extra is now fully built and equipped with a 52 engine and a 11x6 prop. Hopefully I will have the courage to maiden it this summer. B.
  9. Birgir
    Hi I ‘ve just finished building my Sig Somethin‘ Extra kit. Next step will be running in the motor (SC 52) and adjusting the control throws. The recommended throws in the manual seem a little bit extreme to me, even the low throws. I ‘m about an average flyer, I think and I would welcome any good advice on this matter before the maiden flight. Thanks
  10. Birgir

    Birgir posted a gallery image in Member Albums

  11. Birgir

    Birgir posted a gallery image in Member Albums

  12. Birgir
    Hi Nigel What a splendid looking example of a Keil Kraft Mini Super. I particularly like this model because I’m still flying mine and some of it is over 47 years old. This video was taken 13th of June on a windy day. **LINK**   Edited By Birgir on 26/06/2020 11:59:29
  13. Birgir
    Hi everyone In a very easy and slow manner I‘ve started my next build. It is a Sig Somethin Extra kit I bought a few years ago. When living on an island in the middle of the Atlantic Ocean it takes some time to gather everything you need. So when I bought the kit I also bought the servos, engine, wheels and most other things I remembered. Now when the build is well under way I remember that I havn’t bought a suitable propeller. In the instruction manual the recommended engine is a 40 – 46 (even 50) two stroke but I decided to be on the save side and bought an ASP52A engine. Also, in the instruction manual, it is recommended to avoid heavily pitched props. The recommended prop for the engine is in the range from 11*7 to 12*5 So now to the question at hand: Would a 12*4 be a suitable choice in this model/engine setup? Thanks in advance Birgir
  14. Birgir
    And then a grizzly bear came out of nowhere and graped the rudder...
  15. Birgir
    Hi David I’m sorry for your not so soft landing, but bear in mind that Luis also had a tough landing in England on the 25th of July 1909 and also broke his landing gear. By the way, I also learned the hard way that the Bleriot is no glider, so just look at this as an opportunity to redesign the engine room. My Bleriot has been hanging from the sealing of my garage since last year so it is still in a pretty good condition. To answer your question, my Bleriot has 425 gr of lead up front so I think that it would be good to put in a larger engine and use some of that weight to create power. My SC30FS needs full power almost all the time to cope with the heavy model. Usually when you come home with a broken model it looks a bit better after some inspection and rebuild planning, hope that this is also the case this time. Please post some pictures of the rebuilding procedure. Good luck, Birgir
  16. Birgir
    At last I had the opportunity to test my new aileron differential setup. As suggested, I put in 1:2 differential i.e. twice as much up as down. This helps a lot and now I must practice using the rudder for coordinated turns. I also need to practice my landings, nothing serious though. Thanks again for the advice.
  17. Birgir
    Thanks for this enlightening discussion, it has helped me to get a better understanding of the task at hand. I ‘ve already put in 2 to 1 aileron difference as John suggested and now I ‘m waiting an opportunity to test that configuration. I also agree with Jon that I would like to managed the rudder to practice the coordinated turn by hand rather than mixing it with the ailerons. I had to read Jon exercise suggestion a few times, but when I got it I look forward to trying that in the air. I also wonder if I can put the aileron difference on a switch and use the same method to test the effect of that. Regarding CoG, that had crossed my mind. I felt that the model was a bit livelier than my old Mini Super trainer and thought that perhaps it could be because of rewarded CoG. When I checked it, it is as per plan so I thought that the reason for a livelier model is just a different and a sportier model. 😊 B.
  18. Birgir
    Hi everyone A few years ago I built me a Sig Hog Bipe, which is a 60” biplane. There are four ailerons, top and bottom connected by a rod and 2 separate servos in the lower wing. Recently I have built up a courage to fly the model after some practice with my Mini Super trainer. Of course there are some differences between the flying of those two models. I’ve already flown it 5 times and I’m getting a better understanding of the model’s behaviour. One thing that troubles me is that when turning, using ailerons and elevator as I’m used to from my trainer, something unexpected happened. When applying the ailerons the model banks to the correct side but when applying a small amount of up elevator it tends to climb out of the turn and raise the nose. I’ve managed to work around this by either applying rudder in the correct direction and/or rolling the model almost 90 deg and use a considerable up elevator. A friend at the field pointed out to me that possibly this has something to do with the down aileron on the outer wing creating a drag working against the turn. So my question is: Does anyone have a similar experience form a similar model? If I put in an aileron differential, how much should I use? As is the aileron movement is about 1 inch from top to bottom, half an inch in each direction. Any comments appreciated B
  19. Birgir
    Hi Luccaaa I admire your build and it is very inspiring, hopefully I can find some time to start my next build soon. Have you made a decision about the three or four channel, aileron or not? I have a 45 year old Kiel Kraft Mini Super. A few years ago I gave it some rebuild (not the first one) and put in two wing servos, decreased the dihedral and put in ailerons. Of course it lost some of its originality but I find it much more fun to fly. B
  20. Birgir

    Birgir posted a gallery image in Member Albums

  21. Birgir

    Birgir posted a gallery image in Member Albums

  22. Birgir
    Hi This morning a managed the maiden flight of my first biplane, - at last. It was built in 2013 and was supposed to be my comeback to the sport of RC flying. Four decades ago I had build a Mini Super but never did manged to fly it successfully. So now I intended to do everything right and listen to every advice (being that older and hopefully wiser). I joined a club, got me a sim and started to practice. When I asked my new clubmates for advice, it was simple. A biplane is not a good first plane, - not even the second or the third. Probably the fourth or the fifth. So, I decided to do the right thing and listen to the experienced flyers. I rebuild my Mini Super, I build a foamboard Nighthawk FF-117, a FoamFighters Old Fogy and a Spitfire, and a Mini Jazz, all of them, except the Mini Super, now a history that can by read at **flugmodel.weebly.com**. Then I built a Bleriot XI by David’s Boddingtons plan and that has been a success and is still in a top condition. So, the Sig Hog Bipe is the seventh model maidened over the last five years and has now had two successful flights – the advice of my clubmate has proven to be right. B. Edited By Birgir on 06/07/2018 12:28:39 Edited By Birgir on 06/07/2018 12:28:58
  23. Birgir
    Thanks Donald Yes, it has crossed my mind to put in a bigger engine but the front of the fuselage is more or less designed around the 30 so it would call for more changes than I would want to do. I’ve also got hooked on the challenge of flying with the marginal power, it is more demanding 😊 Yesterday I put in a new plug and now it is running almost 9000 rev. spinning a 10x5 and that helped a lot on take-off. Maybe it is time for me to carry on with the next project, the Bleriot has been THE project for almost three years now. Thanks for all the help along the way. B.
  24. Birgir
    Thanks AVC Yes, it looks a bit tail heavy, but the reason probably is that I'm holding the tail down trying to gain some hight. The engine is a little SC 30 FS so the power is marginal. B.
  25. Birgir
    Hi everyone At last I managed to do two proper flights with my Bleriot XI. This morning the conditions in Eyrarbakki where perfect, calm weather and the field at its absolutely best. I took my Bleriot to the field and manged two proper take-offs, trimmed the plane for level flight with about 60 – 75% throttle and managed a very acceptable landing,- twice! Here is a very short video of the accomplishment 😊 B.
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