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My latest Tiddler

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TIM Shaw12/12/2016 19:54:41
90 forum posts
38 photos

Hi Guys

Been a bit busy nailing together a replacement for my ill - fated (and short-lived) Mach 8

Build is about done, installation to start but I thought I'd share a couple of pics.

Can you tell what it is yet?20161212_105015.jpg

20161212_105056.jpg

 

Edited By TIM Shaw on 12/12/2016 19:55:54

Tom Sharp 212/12/2016 21:01:28
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2164 forum posts
10 photos

Easy Street?

TIM Shaw12/12/2016 21:06:12
90 forum posts
38 photos

Err

No!

john stones 112/12/2016 21:11:12
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8115 forum posts
1308 photos

Mach 9 wink

Nigel R13/12/2016 09:21:51
290 forum posts
78 photos

Challenger?

Martyn K13/12/2016 09:49:20
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4156 forum posts
2902 photos

I would have said Challenger as well - except for the 'Tiddler' n the thread subject field

Martyn

TIM Shaw13/12/2016 13:50:01
90 forum posts
38 photos

Yes Guys

It is indeed a Challenger, but scaled to 80% and intended for Thunder Tiger Pro 36 power, as a winter hack.

I did acquire some lightweight retracts for it, but bottled out of fitting them in view of the state of our field in winter, regretting it a bit now - though, maybe next time.

Cheers

Tim

Martyn K13/12/2016 14:36:59
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4156 forum posts
2902 photos

Don't ruin it TIM, looks far too nice to be a hack. I'd like to see that next year at one of the UKCAA events

Martyn

TIM Shaw13/12/2016 19:36:28
90 forum posts
38 photos

Thanks for the kind words Martin.

I've no intention of ruining it on purpose, but I do need a tool to get a regular fix..

Actually, I normally ruin a model by covering it - it's a black art I've yet to properly master...

Cheers

Tim

Piers Bowlan13/12/2016 20:26:38
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723 forum posts
14 photos

Looks like it is going fast even without an engine! Smart colour scheme too Tim, good choice. Also looks like it would make a good leccy conversion with those clean lines yes (Am I allowed to say that here?!).

TIM Shaw13/12/2016 22:36:48
90 forum posts
38 photos

Yes Piers, I believe you are.

Anything to promote these old classics is encouraged, if I have got the aims of this group right.

The long nose might cause some balance issues, and the gear install is rather tighter than I expected.

My original full size one from about 1988 was pretty quick with a piped Webra Speed 61 in the nose, and I am hoping this smaller one will feel every bit as quick, without using quite as much sky

Nigel R14/12/2016 09:52:54
290 forum posts
78 photos

How big does 80% work out at? 4 ft or so?

It looks very nice.

Piers Bowlan14/12/2016 11:55:29
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723 forum posts
14 photos

Original 66in X 80% = 52,8in span. Four foot four and three quarter inches appx. according to my calculations. I wonder what the empty weight is without the engine etc. and RC gear?

TIM Shaw14/12/2016 20:39:58
90 forum posts
38 photos

Yes, its just over 53" span, and since you ask, the empty weight is 1.01Kg, or 2lbs 3ozs in old money....

My Mach 8 (0.8 sized Mach 1) was a bit smaller at 40" and just short of 2Kg all up.

Flew great on the TT36 and I'm hoping this one will be even better thumbs up

Edited By TIM Shaw on 14/12/2016 20:41:18

Edited By TIM Shaw on 14/12/2016 20:42:26

TIM Shaw14/12/2016 21:16:35
90 forum posts
38 photos
Posted by TIM Shaw on 14/12/2016 20:39:58:

Yes, its just over 53" span, and since you ask, the empty weight is 1.01Kg, or 2lbs 3ozs in old money....

My Mach 8 (0.8 sized Mach 1) was a bit smaller at 40" and just short of 2Kg all up.

Sorry - I meant just under 53", and the Mach 8 was 50"

Seem to have used up all my "edit" options...

TIM Shaw21/12/2016 13:51:17
90 forum posts
38 photos

Hi Guys

All the bits are now nailed on and it tips the scales at around 1.75Kg, or 3lb 14ozs.

However, I am not happy with my U/C, which I fuz mounted for durability, and I have an interference problem with the aileron servo and linkages.

If I were to start this again I would definitely use a separate, mini, servo for each aileron and would almost certainly mount the U/C in the wing.

The reason I say this is that I am unable to get the CG back any further than the most forward recommended position without adding lead to the tail, which is something I would rather avoid.

Just thought I'd mention it in case anyone else is contemplating a similar build.

Cheers

Tim

Nigel R22/12/2016 09:30:00
290 forum posts
78 photos
I had a chilli breeze years ago. Similar size and similar engine (irvine 36).

Mini servos in the wing made life a lot easier. I had to put batteries right behind the wing to get correct c of g - Small access hatch in fus.
TIM Shaw08/01/2017 18:17:16
90 forum posts
38 photos

Hi Guys

Got to maiden it in the mist and mud yesterday, flies like its on rails.

Cold and damp, only got the one flight in.

Been back today though, even saw some sun and remarkably I had the field to myself, so I burned off the best part of half a gallon of fuel and got it pretty much dialled in.

It is quick,smooth, and pretty much neutral, although it does seem to have a slight tendency to pull to the U/C in knife edge using left rudder, Strangely though, not with right rudder.

20170108_143550.jpg

20170107_152959.jpg

Might be due to the big wheels - they do spoil the lines a bit, but they work well on our field.wink

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