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  1. #26

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    RE: SCALE JET e-S76 build

    UIH!!!

    Well I did it. Got the first hover done this weekend on Labor Day no less. Guess with all my labor on this thing it was deserving.

    Some details,

    Head speed 1000 RPM
    Heli weight 28lbs
    No stabilization devices or gyro on the main rotor system. All mixing done with the TX
    Pitch curve linear
    -3 +4 +10
    no expo
    875mm semi S OF blades
    140mm Graupner Tail blades
    No ballast added for CG correction. The heli was a bit tail heavy but within CG

    Due to the forward 3.5 degree tilt in the main shaft, as I added collective, the nose lifted before the mains. At first, I felt like I needed to add froward cyclic but once the nose lifted about an inch the rest of the heli followed. It has a really nice scale hover, nose high, LH main down.

    I did not try a "hand off" hover but will the next time. Both collective and cyclic sticks felt very comfortable and very centered as I am used to feeling with a set-up multi.

    Here are some photos and vids from yesterday.

    Butch

    [youtube]http://www.youtube.com/watch?v=7u1VMrqnDBE[/youtube]
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  2. #27
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    Very smooth Dr. Sikorsky!
    Michael Kranitz

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  3. #28

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    RE: SCALE JET e-S76 build

    MK,

    I dont know about Dr.Sikorsky as I only have maybe half a clue, but thanks.

    I started installing the hardware for the cowls. I installed a few when I was doing the fit of the cowls so it was time to add the rest. This thing looked really big without them but when the race car and engine shrine were installed with the blades, lt looked like it put on about 50lbs.

    The Peka head is a beautiful piece of work. It just looks simple.

    Some pics,

    Butch


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  4. #29

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    RE: SCALE JET e-S76 build

    UIH

    Well sgfromny talked me into going to the field this afternoon. It was a bit of a dismal day. Took my Scale Jet e-Powerd 76 along for the just in case.

    Couple of things. Last test hop, we noticed a vertical in the tail rotor. Mr DA here did not weigh the blades. I have one set that tipped the scales at 8g, and another set that weighed in at 9.1g. All blades are now marked and in the correct location. Tail is now smooth as silk.

    I hovered for 5 minuets today. I recharged the nyampdude.com battery's and replaced right at 3700ma back into each battery. When I do the math, with the heli set up as it is today, I am looking at about 10 minuets of flight time. That's pretty darn respectable for a 30lb helicopter.

    Each battery's is 22.2v 10,000mah at 22c. The throttle curve is 0 50 50 50 50 50 which is giving me a head speed of 1000rpm. This is restrictive. The battery's, and ESC are stone cold after the 5 min hover. The motor is running about 110 to 120 degrees. With the 875 OF blades I want to push the rotor rpm to 1100 or 1200. I believe the efficiency will be a little better with the faster head speed. The end blade size will be 950mm.

    Here is the vid of the test hop today. I will be back at the field hopefully tomorrow for more.

    Butch

    [youtube]http://www.youtube.com/watch?v=uprRT9TlVMs[/youtube]

  5. #30

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    RE: SCALE JET e-S76 build

    Very nice machine, would like to convert mine to electric

  6. #31

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    RE: SCALE JET e-S76 build

    UIH

    Making some progress here on my Scale Jet S-76 e -Power.

    I am very methodical when it comes to test flight on a new heli. I have a plan I go over with my spotter who will be right next to me for each flight. I use a couple guys that are famiular with the project. They can offer another view or opinion and keep a close ear out for anything that sounds funny.

    This past weekend I had a plan. Wanted to do a couple of hard collective pulls to see how the tail reacted and if the rotor would droop under the load, and also wanted to retract the gear in flight. Most of this is to become confortable with how it reacts to all kinds of conditions. Never flying a heli with retracts how do my fingers feel when I flip the switch, do my little piggys fit where i would normally fly from, you know stuff like that.

    Well everything went great. I even worked in a little ground taxi which was much easier than I expected.

    Here are some shots and a video of the weekend.

    Butch

    [youtube]http://www.youtube.com/watch?v=ErZwT44LWkU&feature=channel[/youtube]








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  7. #32

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    RE: SCALE JET e-S76 build

    And another vid

    http://www.youtube.com/watch?v=kFn39...eature=channel

    well for some reason I cant inbed this one

    Hope the link works

  8. #33

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    RE: SCALE JET e-S76 build

    Nothing but rain here on Long Island today. There are two good things about this, B&B, Build and Beer.

    I have been thinking about door hinges for sometime. Due to the unique shape of the cockpit doors, this was perplexing. First, what kind of hinge. Between surfing porn and R/C porn, I ended up at the BVM site to order some Aero Poxy. Looking over there accessories, I ran across these cool little gear door hinges. I did need some hinges for the gear doors and or the cockpit doors, cheap enough, I ordered some.
    I forgot the Aero Poxy by the way.

    Well the little hinges arrived awhile back and today I decided to install a door hinge.

    Here are some pictures of the install. When I remove the nuts and open the door, I can lift the door off the airframe side hinges with no problem. I bonded some small wood blocks to the fuse and made some cutouts in the door to install more small wood blocks to mount the other side of the hinges to.

    A pretty clean install if I don't say so myself. Now for the other door.

    Butch
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  9. #34
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    Butch, here are some pix of my maiden flight. I didn't bring a video camera to the site because I wasn't sure how things would go and if we would ever get it in the air. Turns out that all of the hours screwing around with the ESC, radio settings, pitch etc. was well worth it.

    This has to be the smoothest flying heli I've ever flown!! Like glass!

    I still have to play with the throttle curve. Two clicks on the right slider (after I pushed trim all the way up to get it started) and I was at 1,040 RPM. I have the ESC in governor mode but the curve in my 14MZ is backward (I reversed the direction of the slider but now have to reverse the dir of the channel itself). Anyway, this is insanity you won't have to deal with using the JR 12X!
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    Michael Kranitz

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  10. #35
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    You can't embed that vid cause the URL is malformed.
    Michael Kranitz

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  11. #36

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    RE: SCALE JET e-S76 build

    MK,

    Beautiful, simply Beautiful.

    Are the top of the blades black too. I know someone that has access to the paint scheme for the blades. Hehe. I am sure even with the hovering and "getting the feel" for her, you could feel the power under the hood.

    I like your thought about the 12X. Best radio I have ever purchased.

    Great shots man and Congrats,

    Butch

  12. #37
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    Blades are naturally dark gray aluminum. They are imposing!! I'll bet there is no more than 2-3 inches clearance between the main tip and the tail rotor tips!
    Michael Kranitz

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  13. #38

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    RE: SCALE JET e-S76 build

    The full scale there is only about 12" between the tail and mains static, however with the coning of the mains there is plenty of room. It looks to me the natural color may be good for the bottom opposed to painting them flat black. The tops of the full scale are white with orange strips. I hope to have my M-Blades soon.

    Seeing your heli complete has inspired me. Not that I was not inspired but, well you know, there is this work thing.

    Butch




  14. #39

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    RE: SCALE JET e-S76 build

    Super Nice machine, MK. It looked great in the air, especially with the wheels (and doors!) up.

  15. #40

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    RE: SCALE JET e-S76 build

    The Office Has a Floor

    Boss away mice will play.

    I got the cockpit floor installed today. I have the Vario 222 seats that need some modification. They are an excellent base to start from for the seats on my Scale Jet 76. The back needs to be a little shorter and they need to recline to match the aft door jamb. The angle of the seat back is the same as the bulkhead that separated the cabin and cockpit. They also need head rest for the pilot to hold up there big heads. That schit gets heavy you know.

    Hey mkranitz, you will really like this part.

    I have to get my ***** in gear for sure now. I need a completed IP to move forward. I need to have it in placed so I can get the correct position of the seats, TR pedals, etc.

    The pilot sitting in the seat, FO Potato Head, is a 12" figure. He is very close to the correct size. The red flight suit has to go for some Dockers and a Polo as Dumb and Dumber wear when they fly the full scale this is being modeled after.

    Some pics,

    Butch
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  16. #41
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    Hey Butch,

    Your pilot is a weenie in his red jump suit. You should get with Mike Brent and have him carve a full pilot in your likeness (I did it!). He does fantastic work and it would be the crowning finish to an awesome piece of craftsmanship.

    I like the IP prognosis. I'm going to begin cutting floor templates soon. Are you doing an overhead console as well?

    mk
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  17. #42

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    RE: SCALE JET e-S76 build

    Yes,

    I know my pilot is a wennie. I will look into getting other pilots that look a little more life like.

    I do plan to make the overheads as well.

    Butch

  18. #43

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    RE: SCALE JET e-S76 build

    Some work on the IP plug

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  19. #44

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    RE: SCALE JET e-S76 build

    sorry for my ignorance, but, what is IP??
    what the?? did you see that! must of been the wind.

  20. #45

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    RE: SCALE JET e-S76 build

    The Instrument Panel

    I was having some trouble up loading the pic.

    Butch

  21. #46

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    RE: SCALE JET e-S76 build

    For the past several days, I have been working on the plug for the instrument panel and center console. Its driving me crazy. Its getting there slow but sure. Looks like Wrong Island will have rain again tomorrow but Sunday could be nice to get out and fly some more. OH SNAP!!! Sunday is a work day, Whoa Is Me, among other things going on.

    Here is a pic of the IP plug. I am making the IP in 3 pieces. The lower portion angle was to great to make it as one. The center console will be places on the pedestal between the seats. The lower RH area of the console plug is where the pilot collective will rest.

    Butch
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  22. #47

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    RE: SCALE JET e-S76 build

    UIH


    I am just about ready to make the molds for the instrument panel. It will be in 4 total pieces, the main panel, two lower skirt panels and the center console. I installed some screws and used a little trick I picked up from a fellow modeler to make the rest of the screw impressions. I had planned to use Electroluminescent sheet to back light the panel. Most all displays are glass with the exception of the RAD ALT in the lower RH corner of the main panel. I believe I will end up using a combination of painted, photographic, and the EL displays and gages to make a very scale appearing IP.

    Butch
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  23. #48
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    Salivating at the site of this work!!!

    Had a nasty landing on Friday and did some minor damage to gear and one door. Had it fixed in about an hour or so.

    Question for you: When my gear are fully extended with the plunger nearly all the way in, I can still move the gear with my hand. Sandy is helping me on this but I'm wondering if you experienced the same.
    mk
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  24. #49

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    RE: SCALE JET e-S76 build

    NO!!!

    I hope everything is OK and the repair is very minor.

    What happened during the landing? Was it just a hard landing?

    My gear has a little movement when down and locked. One is a touch more than the other but not bad.

    Butch


  25. #50
    Scale Heli Addict mkranitz's Avatar
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    RE: SCALE JET e-S76 build

    I was posing the heli for photos and was about 40 degrees from nose in close to the ground (to get the mountains in the background for the show). A bit of wind pushed the nose down and I over-corrected. That lead to some gyrations because I was in ground effect. It didn't help that the heli was now drifting laterally so as soon as I stabilized the pitch party, I swing the tail around. It still had sideways momentum and I was above grass at about 6 inches altitude. In retrospect I suppose I should have added collective, but the wind sock pole and a fence were nearby and I was nervous already. I landed with some sideways momentum and it broke a ball link off the gear door and separated the forward hinge from the gear door.

    The telescoping tube came apart on both sides and broke the link on the other.

    It's all working now. Truth be told I should not have brought it into a nose in hover at 5 feet high on my second flight ever. I had only flown it for 5 minutes total over two flights and I told the guy taking shots for me that I wasn't really comfortable doing it...but did it anyway since the magazine deadline is coming up this week. I had scheduled to have a qualified pilot friend fly while I shot pix, but he didn't make it to the field and the weather was perfect when I got there (until the wind started gusting of course).

    Anyway, I got some good shots and she's ok. Lessons learned!!
    Michael Kranitz

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