Hi group,
I have two questions regarding this topic about raising the
Cupe's tail:
1.- Does anyone have some photographs so we can see the differences between
these two models (earlier ones and later models) ?
2.- This one has to do with the flight difference experimented after raising
the tail to the correct high: For those who got accustomed in taking off and
landing with a "low tail" (especially during take off): Did you have any
problem or something to tell about the difference? I once heard that after
rising the tail, and on a short grass field the pilot had to abort a take off
because he felt uncomfortable as it was a bit hard to rotate in that same field
as he used to operate ?
Has the rod that commands the elevator a possibility to change to a second
(more sensitive) position ?
Thanks in advance
Best regards
daniel arditi
GrupoErcoupe Argentina
________________________________
From: Kevin <[email protected]>
To: [email protected]
Sent: Fri, April 30, 2010 1:56:53 PM
Subject: [ercoupe-tech] Re: Raising Tail on early coupes
On the later gear the space between the bottom of the stack of donuts and the
clip ring is fixed and you cannot insert an extra donut. But you could make the
spacer out of donut like material for extra cushion and replace it as it got
compressed. It would not be very thick and would not last long I would think.
Kevin1
--- In ercoupe-tech@ yahoogroups. com, "texasaviator" <texasaviator@ ...> wrote:
>
>
> Yes there are several differences.
>
> The earlier coupes have the steel MLG bolted on to the front of the spar and
> the later aluminum ones are bolted on the back.
> This complicates spar replacement of the earlier models because the spars are
> different.
>
> The steel trailing link is longer to make up for the difference of attachment
> point and come up with the same wheelbase distances. The travel is longer
> which I think gives a better hydraulic cushioning on landing. It might even
> have better cross wind landing qualities. ( speculation )
>
> The steel spacer will work in raising the tail if inserted together with the
> donuts. This is much easier to do with the early gear as it does not have the
> "*%&$" clip ring that needs to be inserted while compressing the stack with a
> hydraulic press.
>
> With the steel spacer inserted, the tail will rise. However, by inserting one
> extra donut in the stack, ( as explained in the 337 procedure I used... I
> hope it is the one uploaded in the files here), the additional spacer is now
> also compressible adding to the spring action of the rubber donuts. Rubber
> donuts are cheaper than the steel spacer as well as lighter. Everybody
> probably has an old donut somwhere from the last change, A lightly used one
> may work just great for a small increase in tail height.
>
> As for using an extra donut with the aluminum MLG, I don't see why it would
> not work also. A spacer is a spacer.. and it makes more sense to increase the
> spring factor of the donut stack with an extra rubber spacer than a steel
> one. Both will stiffen the stack but the steel one will also reduce the
> travel.
>
>
> Alan Fairclough
> N87333
> N94694
>
