Precedent Stampe 1/4 Scale

[Garry Webb]

Thanks Martin. I have 2 kits and will have a look at both plans and see how they compare with each other.

[Garry Webb]

The building note's on one of the plans are in English only and the other plan is in English as well as French. The tail plane incidence is the same on both plans,,, wow . I see what everyone means. Just doesn't look right .

[cymaz]

I found it tail heavy using the plan CG 

[Jon H]

My tail has substantial positive incidence, which is fine and per the plan so dont change it. It will fly with a bit of down trim. It balances on the plan marks but a smidge nose down at that point. 

 

Note that i try to fly mine at a scale sort of speed. If you want to fly it like a pitts you are likely to have more trouble

[Martin McIntosh]

My tail has not got obvious positive incidence as built as per plan but I had to assume it to be correct. The birch ply centre between the fin and tail precludes any later change so be careful to get it as per full size. Lent my plan to someone but I seem to recollect some French on it.

 One major point I forgot to say is the upper wing so called braces. You must fit a couple of long 1/8th birch ply pieces or the wing will fold. These need to be bent a bit to follow the spars but easily ? done. A bit of spar doctoring may be required.

Keeping everything at the rear end as light as possible should ensure that there are no cg problems.

[bert baker]

Most fly with down trim applied 

mid you troll back for about a week you will see comments about mine flying with up trim

 

I have removed the tail and covering so I can see how it was installed.

[extra slim]

Looks to be around 8 -10 degrees positive tail incidence there Bert. Is that 1/4 inch higher at leading edge than trailing?. If you are saying you need up trim, and that assuming no issues with wing incidence or thrust, it would imply that that is a little too much, and maybe 5 - 6 degrees would have the tail flying level, neither up nor down, given others comments on the thread.. Could be a decent starting point for anyone building one, as I heard "they fly tail down, unless you add some positive tail incidence". Thanks for sharing

[Martin McIntosh]

Given that the tail section is quite thick, that looks more like zero deg. wrt the longerons. Mine appears to be just the same, perhaps even a bit more positive. Bit of a teaser really since the longerons are straight all the way to the front. From the looks of the ply I would think that it is a SLEC version because mine uses 1/16th birch ply through the tail and fin.

[bert baker]

It was from a very old kit

 

I’ve only know them from the old 80’s SLEC catalogue the die crushed type and the later machined kit that’s now available from SLEC 

[Peter Jenkins]

So what are the incidences of the main wings Bert.  Be interested to know so I can check mine.  I also need a good bit of down elevator indicating the tailplane is set with too much positive incidence.

[bert baker]

There in the bin with the rest of the fuz

I think they might be on here if you still back 

[Richard Acland]

When I built mine many years ago from the Precedent kit I thoought that much tailplane incidence would put  it in a nose dive. As it happened it climbed like a home sick angel. Ever since it has needed a shed load of down elevator to fly straight and level.

[Martin McIntosh]

I think you mean not enough positive Peter.

[Peter Jenkins]

You are quite right Martin.  As set up with neutral elevator the force on the TP is too much down force.  Solution is to add a bit more positive AoA.  Difficult to do when it's all glued in!

[bert baker]

[bert baker]

[cymaz]

I have to say that I’ve sold my Stampe that began this thread 🥺...I got involved in a part exchange for a 1/3 scale Tigermoth.

 

Im glad I started this thread and it’s been great fun doing it. 

[Peter Jenkins]

Well, I've still got "my" Stampe.  I only got it after reading your thread.  It was built by a club mate who sold up all 10 of his models and let me have the Stampe for peanuts for helping him to see his other models.  It really is a lovely aeroplane to see flying around.  It's got an OS120FS pump in it and that is ideal given the twin tank height problem - the pump delivers a supply at a constant pressure to the carb regardless of the aircraft's orientation.

[bert baker]

21 hours ago, cymaz said:

I have to say that I’ve sold my Stampe that began this thread 🥺...I got involved in a part exchange for a 1/3 scale Tigermoth.

 

Im glad I started this thread and it’s been great fun doing it. 

I flew my 1/3 scale moth this year, got the G38 on reduction drive but have a Valach 60 to try in it

[cymaz]

Nice one Bert 🤗

 

I’ve got an AGM 55 in my Moth, and it floats around. Shall we start a thread for big 1/3 & 1/4 Moths ??

 

Here if you want

 

Edited December 30, 2023 by cymaz

[Alan Hilton]

I sold Bert the tiger because my knackered back wouldn’t cope with big models any more .I flew it for years on a zenoah 38 and it was great .The prop was scale size (22 6 ) It flew scale like in most conditions .It was a bit tricky in a force 5 wind though .

[bert baker]

1 hour ago, Alan Hilton said:

I sold Bert the tiger because my knackered back wouldn’t cope with big models any more .I flew it for years on a zenoah 38 and it was great .The prop was scale size (22 6 ) It flew scale like in most conditions .It was a bit tricky in a force 5 wind though .

I chickened out on trying it with the straight drive G38

[bert baker]

2 hours ago, cymaz said:

Nice one Bert 🤗

 

I’ve got an AGM 55 in my Moth, and it floats around. Shall we start a thread for big 1/3 & 1/4 Moths ??

 

Here if you want

 

Only if we can have a naughty step with cushions and a coffee maker 

[Biggestgerbil]

Hi, is this thread still active.

I started a Precident Stampe kit in 1981 (ish) bought from a shop in south London.

It did not survive the move to New York when about 1/3 built.

Last week, overcome with nostalgia, I bought a SLEC Stampe from Sussex Model Center.

Maybe this was not the most logical step.

However, buoyed up by this thread here I go.

[bert baker]

Hi yes welcome we’re all still here