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  1. #1176

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    RE: TBM Shock Jet

    Here is a more recent photo of my K80F in a Shokjet with a FOD screen.
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  2. #1177
    rcguy59's Avatar
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    RE: TBM Shock Jet

    I think it's an excellent match. Since the K80 is a bit on the heavy side, more ballast is required in the nose than with a Rabbit. I don't consider that a problem, just something to be aware of. The Shokjet is probably the LEAST weight-sensitive airplane I've ever owned. As always, more power means more stress potential on the airframe, so go easy at first. The Shockjet was designed for a 12-14 lb. thrust turbine. Sloppy handling will fold a wing even with a small turbine. A larger one means you have to be that much more careful. Once you get used to it, it's no big deal, you just can't yank it around like some foamy.
    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  3. #1178
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    RE: TBM Shock Jet

    Thanks, Tom.
    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  4. #1179

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    RE: TBM Shock Jet

    Here is another photo from the bottom. I had to cut out a little from the bottom of the airframe but there is room to put it back as long as you make it a removable plate, I just have not gotten around to it yet. I have 28 flights on my SJ with the K80F and I would say that the K80 is a very good match for the SJ. I fly most of my flights at just a hair over half throttle and I'm getting 8 minute flights with about a third of my main tank left for reserve (50 oz main tank). The half throttle setting provides plenty of power for big loops, cuban eights etc. I clocked it on radar at 129 straight and level at about 3/4 throttle, if our field was big enough to allow full acceleration I'm confident she could do high 140s at full throttle. Given that the SJ is basically a flying drag chute 140+ is pretty impressive.
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  5. #1180

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    RE: TBM Shock Jet

    The K80F is a little heavier than the Rabbit RCGUY refers to, but I did not have to put a single oz of lead in my SJ to get it to balance. I simply put a 3 cell LiFE 2100 mah battery for the turbine, along with a couple of 2 cell LiPo 1300 mah batteries (for the receiver etc.) in the nose and it balanced perfectly. To minimize the possibility of over stressing the wing I fiberglassed the center of my wing (9" from the center) with two layers of 6 oz fiberglass cloth and resin. It took a little work but you can hardly tell I made the mod and it gives me a lot of piece of mind so the extra effort was worth it to me. -Tom

  6. #1181

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    RE: TBM Shock Jet

    I made my decision After speaking with Gerry for a while I made my mind up to go with a JC Rabbit. This should be a good engine in the SJ and will be great for something else in the future.

    Props to Gerry for spending so much time with me, a true gentleman!

    Thanks for your suggestions!

    Steve

  7. #1182
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    RE: TBM Shock Jet

    You're gonna wuv dat Wabbit ! Here's mine in my Shokjet.
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    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  8. #1183

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    RE: TBM Shock Jet

    As a novice jet owner... is there a reason not to leave the former intact and slide the engine back an inch or so? I know the CG thing but I can't image that with the long nose you can't get your batteries etc. forward enough to balance out. What am I missing here?

    Thx,
    Steve

  9. #1184

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    RE: TBM Shock Jet

    Hey thanks Guy and Tip for those Pics. Tip, you have plenty of room in front of the K-80 for a tank. What oz. tank is that in there now?? Now.... here's the catch, I was feeling mighty good about my K-80 in the SJ till I saw Guys Rabbit in there, Ha. I have both still sitting in their boxes. Ha. I'v ran the Rabbit for about a half and housr and the K-80 for about 10 Mins. I was wanting to put that Rabbit in a rookie II I have here but it does look nice in that SJ. Ha. Ha.
    Scratch it till it bleeds Convert it till it chokes

  10. #1185
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    RE: TBM Shock Jet

    Flip a coin, Hooker. Personally, I would put the Rabbit in whichever is heavier since it makes more thrust.
    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  11. #1186

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    RE: TBM Shock Jet

    Yep-think your right. Think I will install the K-80 in the Shock and the Rabbit into the Rookie II. The Rabbit will sooner or later wind up in my CT-114.
    Scratch it till it bleeds Convert it till it chokes

  12. #1187
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    RE: TBM Shock Jet

    Which version of the Rabbit do you have?
    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  13. #1188

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    RE: TBM Shock Jet

    I have a 50 oz main tank.

  14. #1189

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    RE: TBM Shock Jet

    Here is some video of some flights this past weekend (Shokjet with K80):

    http://youtu.be/1Lm_Vr4as3k


  15. #1190

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    RE: TBM Shock Jet

    Hey guy. I have the latest of the last of the Ver I Rabbit but the big secret on this one is it will put out more than 19#. Ha. Ha. You are running a 50 oz. tank with your K-80??? How many Mins is it good for?
    Scratch it till it bleeds Convert it till it chokes

  16. #1191
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    RE: TBM Shock Jet

    The K80 I refered to is owned by Tip22v. I have a Rabbit in mine. My Rabbit is one of the last of the original propane-start ones shipped. The kero-start version was announced a week or so after I received mine from JetCentral. Since I prefer propane-start anyway, plus Eric gave me a really good deal on it, I'm happy. I wouldn't part with this Rabbit ! The fuel burn with Tip22v's K80 seems to be very similar to that of the Rabbit. If it were mine, I wouldn't consider the 50 oz. tank to be enough. 70 oz.+ is more like it. 50 oz. only gives you about 6 min. and a minimal reserve unless you really baby it, which I don't.
    "Never wound a problem. Kill it dead." Clarence "Kelly" Johnson

    "Speed is great, speed works. Where would we be as a species without speed? You know, we'd still be eating mud." Jeremy Clarkson

  17. #1192

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    RE: TBM Shock Jet

    Well, I have a 64 oz. tank in my SJ now so guess thats what I would try with my K-80.
    Scratch it till it bleeds Convert it till it chokes

  18. #1193
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    RE: TBM Shock Jet

    StevL
    Just letting you know that you are getting the V-100 Rabbit!! 22.5lbs BABY!!!! Let'er burn up the skies!!!


  19. #1194

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    RE: TBM Shock Jet

    Thanks Gerry, pleasure doing business with you. BTW; I did order the jet-tech 92oz tank, I really want to fly about 10 minutes and have a decent reserve.

    TBM says the nose gear, brake, wheels, etc. should ship late this week or next.... time to start slotting for hinges

    Thx,
    Steve

  20. #1195
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    RE: TBM Shock Jet

    You should get that! With my Falcon I get 8min. With still 1/4 left. I like FULL bore most of the time!!! HEHE!!! You will have to keep me informed on the install and how it runs!!! Let me know if you need anything else..... Maybe come test fly it....LOL


  21. #1196

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    RE: TBM Shock Jet


    ORIGINAL: rcguy59

    Sloppy handling will fold a wing even with a small turbine. A larger one means you have to be that much more careful. Once you get used to it, it's no big deal, you just can't yank it around like some foamy.
    I take it TBM did not beef up the wing on the current batch of SJ's compared to the previous ones
    Ira d

  22. #1197
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    RE: TBM Shock Jet

    Its the same wing design as all they have had. If you do it right, it will hold about anything! I have my throws set at 150% and have had NO problems...EVER! I have several videos out that you can see the throws! Just build the wings with Hysol OR Gorilla Glue and you will be fine!


  23. #1198

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    RE: TBM Shock Jet

    You can fold any wing at half throttle on a jet if your not jet biased. I would trust this wing any day. Lord knows I have tested it too!!! Haa. Haa.
    Scratch it till it bleeds Convert it till it chokes

  24. #1199

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    RE: TBM Shock Jet

    Well I guess I can join the club! Sent off payment to Gerry for a shock jet and ordered a vt-80 from dreamworks. I can't wait for it all to show up!

  25. #1200

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    RE: TBM Shock Jet

    Welcome to the fold Price. You will love it.
    Scratch it till it bleeds Convert it till it chokes


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