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KMP F-7F Tigercat

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Old 04-14-2008, 04:38 AM
  #901  
ton goede
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Default RE: KMP F-7F Tigercat

Ok Detlef,

thx for the info...hope my will come very soon now.....
Is Darrell on a holiday or something..?
Darrell if you read this...please respond...

thanks...
Ton

p.s. Detlef, when does your TC have your maiden.....????
Old 04-14-2008, 04:45 AM
  #902  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi Ton,

I have scheduled the maiden for next weekend - if meteo-conditions will be ok.

For the moment it looks good - but only the forcast

I will post infos about the maiden here ...

Cheers, Detlef


Old 04-14-2008, 10:53 AM
  #903  
VKerster
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Default RE: KMP F-7F Tigercat

CHASRB, MY PLANE, T-CAT #2 IS #18 FROM BATCH #3. ALL, T-CAT BROS, SOMETHING TO REPORT. I CUT AN ACCESS HOLE FOR THE WIRE EXIT IN MY CENTER SECTION AND PLEASENTLY DISCOVERED A VERY BEEFY (1/4" TO 3/8" THICK) PLYWOOD CENTER CROSS BRACE GLUED IN RIGHT ON THE CENTER LINE OF WHERE THE WING TUBES BUTT IN TO THE RIBS. I TOOK A GOOD LOOK AT MY CRASHED WING AND FOUND THAT WING HAS THE SAME WOOD BRACING (#38 BATCH #1) AS T-CAT #2. THIS WOULD EXPLAIN WHY THE CENTER OF THE CENTER SECTION DID''NT FAIL IN THE CRASH. GENTS, A QUICK CHECK TO SEE IF YOUR WING HAS THE CENTER BRACE INSTALLED: GENTLY PRESS ON THE SKIN WHERE THE CENTERLINE OF THE TUBES WOULD THEORICALLY INTERSECT IF THEY CAME TOGETHER. THE CENTER SECTION SHOULD FEEL VERY SOLID IN THIS AREA. YOU SHOULD BE ABLE TO FEEL THE WOOD UNDER THE SKIN. IT NOW APPEARS NO REINFORCING IS NESSASSARY ON MY WING.....
Old 04-14-2008, 11:38 AM
  #904  
chasrb
 
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Default RE: KMP F-7F Tigercat

Thanks for the info VK! I checked my TC and what I find in the location you mentioned is a 1/8 (maybe) cross rib with header strips top and bottom. You can see it in the fist pic second row of post 891. It could be strong, but I left the 1/8 x 3/4x 22" T-6 bar in for that extra pease of mind.

Maybe the second batch which I have did not have the brace.

thanks
Old 04-14-2008, 11:40 AM
  #905  
chasrb
 
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Default RE: KMP F-7F Tigercat


ORIGINAL: Detlef Schmidt

Hi Chuck,

your job looks good and I agree 100% with you - we will sleep better with the reinforcement of the centre-wing-section.

I also finished my reinforcement during last weekend.

Maybe A.Kondors comment is right that we do not need to do the mod. but in case you will pull too hard one day I am sure we could extend the life of our TIGERCATS with this mod.

My TC weights 30 lbs with 2x g26, SIERRA retracts and all geardoors operated and I have placed the fuel-tank in the centre-section - So I sleep much better with the modification ;-)

Maidenflight is scheduled for 19./20.04.2008 if wheathercondiitons will be ok those days....


best regards

Detlef
Detlef, can I see some pics of your nose wheel doors?

Thanks
Old 04-14-2008, 01:55 PM
  #906  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi Chasman,

please give me some days. I´m so busy in the office for the moment.

During the weekend I will take detailed pics and post them here...

Cheers, Detlef
Old 04-18-2008, 10:06 PM
  #907  
VKerster
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Default RE: KMP F-7F Tigercat

CHASRB, HAVE YOU FLOWN YOUR T-CAT YET? I'M READY TO GLUE MY WING TOGETHER.
Old 04-19-2008, 09:42 AM
  #908  
chasrb
 
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Default RE: KMP F-7F Tigercat

Not yet, but close. I too am getting ready to glue my wing together. Then I have to wait for the custom exhaust from Keleo, his will probaly be better than what I can build.

As you have read from another post I am/was considering using Copper or some other metal tube and running all three pipe to the bottom exhaust port of the nacelle.

If you ahve any suggestions on that please let m,e know.

Happy flying!

Old 04-19-2008, 03:10 PM
  #909  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi all,

attached you will find the pics of my nosegear-doors...

Todays weather was very ugly in Bavaria, (12°C, rainy and very windy) so that I couldn´t maiden my TC. Tomorrows forcast is a bit better and maybe I will try tomorrow and if not I will try next weekend.

Cheers, Detlef
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Old 04-20-2008, 09:16 AM
  #910  
chasrb
 
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Default RE: KMP F-7F Tigercat

Detlef, thankd for the photos, sorry you cold not maiden yesterday, but another day will come. Nice setup on the doors!
Old 04-21-2008, 03:36 AM
  #911  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi all TIGERCAT friends,

yesterday in Bavaria meteo-conditions where CAVOK and no wid !

So I had my big day !!!

At 15.00 local-time my CAT took off for the first time.

Unbelievable. Its so powerful with the 2x G26 and the 30 lbs are no problem at all.

Anyway to take off I really had to pull the elevator, without rotating the CAT wont take off !

Maneuvers all are easy to perform. the only tricky maneuvers are sharp turns, as the CAT cuts down and you have to apply rudder to maintain altitude.

Landing speed is not slow, but easy to control with 50° flaps.

It was a soft touch-down but after touch-down the cat bounced of few times. No probs for the SIERRA gear, but I need to improve my landings...

A friend of mine took a video-clip but it will take some days to post it here.

P.S.: Teh CORSAIR next to my TIGERCAT was built from Peter and is flown by Thom. Its a complete wood-construction from a Brian Tylor plan.

I want to say thanks to my wingmen Peter and Thom for the great support during built and maiden.
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Old 04-21-2008, 04:05 AM
  #912  
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Default RE: KMP F-7F Tigercat

Detlef. Congratulations on the maiden flight! I am very happy it was successful I see you flew with three-bladed props and there was no problem with them from a performance standpoint. That is good to know since am looking to use the Solo prop setup on mine with three blades.

Really nice place to fly too from what I can see!


We are all looking forward to seeing and hearing the TC fly!
Old 04-21-2008, 07:37 AM
  #913  
jbwilhelmi
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Default RE: KMP F-7F Tigercat

Congratulatoins! Nice to see some good news posted!
Jack
Old 04-21-2008, 08:37 AM
  #914  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi Chasman and Jack,

thanks for the congratulations !

About power and performance there is really no doubt.

My G26 are turning the 16x8 3-blade props with 7.100 rpm and thats giving really thrust.

Cheers, Detlef
Old 04-21-2008, 11:05 AM
  #915  
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Default RE: KMP F-7F Tigercat

Hello TC builders,

It's cool to see others working on the same project as you are and the different approaches people take to solve design problems. I am pretty close on my TC. The wings are complete and I am installing the radio equipment and linkages now. I am also using 2 G26 engines and I am happy to read from Detlef and VKerster that the 26's will pull this thing through the air at 30 lbs. I am currently thinking about designing a mechanism to make sure the nose wheel is centered when it begins to retract so that it won't hang on the opening if it gets turned after the control wires become slack. Have any of you saw the need for this and if so how did you deal with it. Some sort of a soft spring on both sides of the control arm attached to the nose wheel is my current thinking but a tortional spring on the strut itself may also work.

As for the radio setup I was wondering if any of you had employed gyro(s) , engine synch systems or differential throttle control. All of which I am considering. It is always a fine line between KISS (Keep It Simple Stupid) and giving you more ability to control and react to a problem should it occur.

I will try to post some pics and will let you all know when it breaks ground for the first time.

Blue Skies,

Old 04-21-2008, 03:11 PM
  #916  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hi Blackwidow,

regarding your questions:

1) Centering of nosewheel: For my opinion 2 small springs should do the job
2) RC equipment: I am using 2 receivers Graupner SMC-19. TO use ACT DDS-10 programmable diversity recievers would be a good idea as well
3) Synchro-electronic: I installed twin-synch module but the G26 ar running so well and rev changes are very same of both engines, so I did not use the unit yet
4) Gyro: I do not use any gyro and I do not think is necessary to use
Old 04-22-2008, 12:18 PM
  #917  
CHARLES WINTER
 
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Default RE: KMP F-7F Tigercat

Hi Detlef - SUPER JOB on your maiden flight. I think we all needed some positive inputs about our T-Cats. This project has been very time consuming for most of the T-Cat builders. Thanks for the plctures and congratulations again.

Col. Chuck Winter
Old 04-22-2008, 12:28 PM
  #918  
chasrb
 
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Default RE: KMP F-7F Tigercat

Okay, sanity check here... I don't seem to have clamps large enough to clamp my wing tips to the nacelles - any suggestions? I thought of using rope, belts and then I ran out of ideas...lol
Old 04-22-2008, 09:49 PM
  #919  
n9331v
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Default RE: KMP F-7F Tigercat

Blind nut and a bolt
Old 04-23-2008, 02:07 AM
  #920  
Pylon2
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Default RE: KMP F-7F Tigercat

Well Done, Mine should fly shortly.
Cheers Richard.
Old 04-23-2008, 03:46 AM
  #921  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat


Hi all,

Thanks for your congratulations.

Today my friend sent the video to me and tonight I will try to post it.


Cheers, Detlef
Old 04-23-2008, 12:34 PM
  #922  
CHARLES WINTER
 
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Default RE: KMP F-7F Tigercat

Hi Chasman - "Pulling Wing/Engine Nacelle together" Just use heavy string or light rope - tie a knot use small dowel/pencil - rotate dowel Tourniquet style twisting - lock down twisted rope till epoxy cures.... Very simple system....

Col. Chuck Winter
Old 04-23-2008, 01:01 PM
  #923  
chasrb
 
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Default RE: KMP F-7F Tigercat

Thanks, I'll give that a try -the bolt idea is good, I just dont want to drill any more on this plane... I must say this plane
has worn me out!
Old 04-23-2008, 01:17 PM
  #924  
Detlef Schmidt
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Default RE: KMP F-7F Tigercat

Hey Chasman,

try to be a little bit patient.

Just in this moment I´m busy on my computer to cut the video-clip from my maiden !

As soon as I am ready I will post the link here ...

I am sure watching the clip will give you back some power to continue with your CAT

Cheers, Detlef

Attached a small teaser-pic cutted out of the clip...
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Old 04-23-2008, 07:37 PM
  #925  
chasrb
 
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Default RE: KMP F-7F Tigercat

Detlef, thank it does help to see it in action! I have finally finished the wing glueing and ready to put it all together to ss how it looks! I have keloe creations building a custm exhaust for me so I will not be able to o any tests until I get the exhausts back. everything else is bascally done. I do have the gear doors to do but I may wait until after the maiden filght to put them on.


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