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Slik Fli

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Martyn K20/12/2012 16:39:33
5048 forum posts
3678 photos

I took advantage of the hobbystores plan offer last week and ordered a Phil Kraft Slik Fli plan at half price.

I think I was ripped off, according to the plan I should have only paid 7'6d nerd


Anyway, the plan arrived safely yesterday and I have had a good look at it this lunchtime. The original was published in RCM&E in November 1969 - I thought it was a lot later than that but it looks like it will be an interesting build. Also tempted to do a 3/4 reduced size one for a .25 as well - this will be 45" span and I think that my (about to be acquired from Mrs Christmas) OS26 F/S will be a good fit in this.

I was aware that the model had flaps, but I wasn't aware that they were coupled with the elevator - I presume going in the opposite direction like a control liner - anyone comment on that please?

Was there some other magical mixing technique that allowed them to behave conventionally (ie just go down) for landing..?

If anyone wants to know what one looks like. the late ntsmith has a build blog here.

Here is one in flight rescued from google:


A very pretty aeroplane for the era.

Another protocol question - do UKCAA build blogs go in this forum?

Best wishes


Edited By Martyn K on 20/12/2012 16:40:13

Concorde Speedbird20/12/2012 16:42:00
2730 forum posts
649 photos



Tony Bennett20/12/2012 16:45:23
5081 forum posts
129 photos

I am sooo tempted to build one and convert to electric.

the extra slim twin has a central flap on the main wing that does the same, makes very tight loops.

(must build the one i have one day)

Martyn K20/12/2012 16:52:49
5048 forum posts
3678 photos

Looks OK doesn't it.

So many models - so little time (paraphrased from one of the screen goddesses of yesteryear)


Tony Bennett20/12/2012 17:02:53
5081 forum posts
129 photos

i just remembered i have the plan for "joe Fosters mark 8" swept wing model.


1966, 66" span.


and yes "too many models and too few hours left"

Martyn K20/12/2012 17:06:48
5048 forum posts
3678 photos

Get it built - it looks amazing..


Tony Bennett20/12/2012 17:14:03
5081 forum posts
129 photos

Yes boss.

blooming bully's on here, not giving anyone time to finish the pile of jobs i all ready have.




I do love the look of it though.

do i build it or not. hmmmmmmmmmmmmmmmmmmmm

Charles Todd18/03/2015 07:05:21
3 forum posts


Here is what Phil had to say about the flaps in his RCM&E article:-

"...the flap coupled with the elevator which had proven so successful on control line models.".


""The coupled flaps made the Slik-Fli very impressive in sharp turns and manoeuvres such as square loops. They also seemed to keep the model flying at all times without any tendency to mush through manoeuvres. The big disadvantage was in landing as they caused the model to float almost unbelievably. An electronic switching arrangement was added to the receiver to permit the flaps to be cut in and out at will.".


Martyn K18/03/2015 11:43:56
5048 forum posts
3678 photos

Thanks Charles

I managed to get the magazine article a few months ago, its quite strange though that PK was actually quite disparaging about his own design while the editor at the time was saying how great it was..


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