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Snowcat Restoration & Modification Projects Forum Major Restorations, Upgrades, and Non-Stock Snowcat Modifications

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  #1  
Old 04-30-2013, 03:59 AM
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Default The continuing saga of Niksons 1402 IMP sn 129

Hi. I'm the guy that bought Niksons Imp. I will be continuing to make improvements to customize it for our use as a cabin access vehicle. So far I've added mirrors, removed the mechanical fuel pump and replaced it with electric, made a snorkel with a K&N filter and vented the crankcase to the engine intake. I added low mounted LED fog lights as we get a lot of winter fog in the Ellensburg Wa. area. I moved the battery from the passenger forward floor area to under the passenger seat along with the winch relay for more leg room on the passenger side. I removed the dash and will build a smaller one for more leg room on the drivers side. To overcome the noisy cabin, I installed a Sigtronics aircraft intercom and 2 Astrocom headsets (ebay) For rear passengers I installed 2 Honda civic seats and added seatbelts to all seats.

I removed both tracks as they were running very tight, even with the idler set at the minimum setting. One track had 53 grousers and the other 54. The track with 53 grousers (213 1/2") was in pretty bad shape but the other looked okay but was also tight (214 1/4"). I don't think Nik had a chance to rebuild them as he wanted to use the cat last winter. From what I can gather from the parts manual for the 1402, there should be 55 grousers with 4" pitch. That would make the belts 220". I have belting and will make a 220" track and see if it fits. I can always cut it back to 54 grousers and 216". From my calculatons of 1/2 the circumference of the sprocket and idler at the inside of the grousers (belt diameter) plus 2x the center distance of the idler and sprocket, the theoretical circumference should be 218 with the idler fully back, 220 at the center positon, and 222 with the idler fully forward. That fits the 55 grouser model at 4" pitch.

I could be completely wrong on this, so if anyone has first hand experience, I would appreciate any advice. It will be a few weeks till I commit to cutting and drilling the belts.

I'll have more as work progresses.
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  #2  
Old 04-30-2013, 09:22 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

You have the same drop-center grousers that I have on my 1404 and I've got 54 grousers/track (both sides). I think the 55 number applies to Imps with straight grousers, but that's an assumption on my part.

Ron
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Old 04-30-2013, 11:05 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

You could be right. I did see a 1404 with straight grousers that had 55. With straight grousers the pitch distance would stay constant as they go around the sprocket and idler, but drop center grouser pitch will increase as it goes around because the radius is bigger than the belt. Maybe I'm overthinking this. Is the pitch of the straight grousers the same as drop center when the track is laid out straight?
The 1402 parts manual I have shows a drop center grouser and that there are 55.
My plan was to make a track with 55 grousers at 4" centers and if it is too long I can always shorten it by one.

I made one grouser already so I would have 54 per side. If the 55 grouser track works out I can make 2 more.
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Old 04-30-2013, 11:07 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Turbinator wellcame to the party

From Nikson to Turbinator..... So
It reminds me sometimes when i had already finished my paintings, and i turn them over, so i did not need to see what i have done on those paintings, for several days, and i start something else in my workshop.
When i turned over in two weeks i realize that my pictures are not finished and i have to do some other changes (Shapes - colors etc)
Sometimes we think that the parts of a story just over,- happy end etc, but in the next minutes, from that story, something else has just began.
Who says the opposite. This scaffolding procedure to improve an already reconstractive project, is a another level for us to think, that nothing is Over.

Regards Nikos
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Old 04-30-2013, 11:26 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Thanks. I do the same thing. After I build something, I'll go back months or years later and wonder "Why did I do it that way?"
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Old 04-30-2013, 02:28 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Quote:
Originally Posted by nikos View Post
Turbinator wellcame to the party

From Nikson to Turbinator..... So
It reminds me sometimes when i had already finished my paintings, and i turn them over, so i did not need to see what i have done on those paintings, for several days, and i start something else in my workshop.
When i turned over in two weeks i realize that my pictures are not finished and i have to do some other changes (Shapes - colors etc)
Sometimes we think that the parts of a story just over,- happy end etc, but in the next minutes, from that story, something else has just began.
Who says the opposite. This scaffolding procedure to improve an already reconstractive project, is a another level for us to think, that nothing is Over.

Regards Nikos
I hope now you guys see why I let my "creation" go to this guy...

I was pretty sure it was going into the right hands, one way or the other...
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Old 04-30-2013, 03:51 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Quote:
Originally Posted by Nikson View Post
I hope now you guys see why I let my "creation" go to this guy...

I was pretty sure it was going into the right hands, one way or the other...
No kidding.

And that rocks . . .
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Old 04-30-2013, 05:56 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Quote:
Originally Posted by Nikson View Post
I hope now you guys see why I let my "creation" go to this guy...

I was pretty sure it was going into the right hands, one way or the other...
Nikson......... 10 points
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Old 04-30-2013, 11:27 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

I'll be at the cabin with no internet so I won't have any posts for a few days.
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Old 04-30-2013, 01:06 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Congrats on an awesome rig and welcome to the zoo!

Now, what does the elevator(?) on your workbench go to?
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Old 04-30-2013, 02:23 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

The reason the snowcat is outside the hangar is that in my other life I am designing and building an 80% scale T6A Texan ll Air Force trainer. I was just ready to start riveting the horizontal stabilizer when I bought the cat.
I have the tail pretty much done, engine and prop are done as well as the landing gear, instrument panel, avionics and canopy. After riveting the stabilizer I'll start on the wings.
But that's a story for a whole different forum.
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Old 04-30-2013, 03:48 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

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Old 04-30-2013, 04:57 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

what kind of engine is that looks like some kind of turbine I would love tto have one in my snow trac I could run circles around Big Als krusty with one of those. on the other hand they never move under their own power so I suppose you could walk circles around his krustys.
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Old 04-30-2013, 05:05 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

T-prop with an APU background? Custom made or specialty item?

Way cool though . . .
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Old 04-30-2013, 05:09 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

custom made that's got my name all over it any thing to out run the krusty crowd. to be serious though that is one nice power plant hope he has a lot of fun with it.
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Old 04-30-2013, 07:09 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

The engine is a Sundstrand T62T2A1 with a -32 power section. The core engine is the APU from a Chinook helicopter which was 95 hp. I upgraded it with the turbine wheel, diffuser, nozzle, and burner can from a T62-32 engine of 150 hp. The accessory drive, starter, alternator, fuel control mods, prop gearbox and prop are my own designs, manufactured in my hangar. I built about 45 of them over a period of 10 years, the last one in 2001. The supply of good cores dried up although you still see one on ebay now and then. I am finally getting around to building an airplane around the one I have left.
The 10 gallon tank in the 1402 would keep this engine running for about a half hour, but it only weighs about 100 pounds so is well suited to a light aircraft.
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Old 04-30-2013, 09:37 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

also suited to a light snow trac but I suppose one would have to have a large fuel tank to get any distance
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Old 04-30-2013, 09:39 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

Not to mention that Jet fuel is over 5 bucks a gallon.
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Old 04-30-2013, 10:03 PM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

5? lucky you Heating oil #1 is 6.50 a gallon up here add the airport tax and delivery charge I bet you would be getting around 8 plus here if you had to run aircraft spec jet-a.
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Old 05-15-2013, 12:54 AM
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Default Re: The continuing saga of Niksons 1402 IMP sn 129

I got some more work done since the last post. This week I got the new dash made, and added some more carpeting to the interior. Put in a little tray so my wife has a place for her cell phone etc.

There was nothing wrong with the dash that Nik made, but I needed some more leg room so I condensed it down with smaller switches etc. I also added a fuel gage, ammeter and idiot lights. By putting the fuse panel under the dash, and concentrating the wiring on the drivers side, I was able to eliminate a lot of extra wire.

I pulled the pan off the engine and added a boss for an oil temperature probe and a new drain boss so the oil comes out straight down instead of sideways. (After getting oil down my arm and all over the place while draining it. I was not a happy camper )

It is supposed to rain tomorrow so I am going to bite the bullet and start on the tracks. I have all of parts and materials now to finish them so I have run out of excuses. I'll post that process as it progresses.
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