> >> I am not sure which Zenith this is then. The 801 is the high wing
> >> STOL
> >> right?
> >> This may be for the ZODIAC XL/601. Somebody said all Zeniths were
> >> the same
> >> firewall.
> >> No problem changing it. Notice this is for a one rotor LSA. Are
> >> you using a
> >> two rotor?
> >>
> >> I dwgs are preliminary so I was planning on using that top center
> >> hard point
> >> for the rear motor mount using a strut arrangement similar to this.
> >>
> >> The rad may fit under the engine. Two rotors require a rad about
> >> 600 cubic
> >> inches no more than 2 inches thick. That implies a rad core about
> >> 18" by 18"
> >>
> >> Paul Lamar ...No rotor no motor.
> >>
> >> Well, No I didn't say all Zeniths shared the same firewall, what I
> >> said was
> >> that the CH-640, and the CH-801 Stol shared the same firewall (as
> >> well as
> >> the certified AMD 2000). The only difference from 801 to 640 is
> >> the top
> >> center reinforce present on the 801. The 640 being a low wing
> >> design doesn't
> >> have this feature. I hope that I have cleared up the confusion.
> >> I have no information on the 601 or 701. they may share the same
> >> firewall
> >> design between each other, or not.
> >>
> >> C. Smith
> >> CH-640 builder
> >>
> >> One needs a menu to keep track of all these numbers :)
> >> What is the difference between a 701 and an 801?
> >
> > > Paul Lamar ...No rotor no motor.
> >
> > The CH 701 is a two seater and the 801 which looks similar is scaled
> > up for four seats. The 701 is limited to 200 lbs firewall forward
> > (Rotamax) while the 801 is designed for the FWF weight of an
> > 0-360. These designs are both extreme STOL high wing, low and
> > slow. There are also Zenith designs that are designed to go faster.
> > I don't know much about them as my interest is with the 701. Judging
> > from forum activity I would guess there are many, many builders and
> > new launches are frequent. Jerry
> >
> > Which one do we need a motor mount design for first?
> > Paul Lamar
>
> The 801 for Patrick Wrase. He is in line for an engine mount. Here
> is some old stuff from around beginning of this month. Jerry
>
>
> OK I assume he wants the 13B trust line moved down 56.94 mm down
> from the Lycoming position based on the attached FW-DWG2.JPG dwg.
> Is that correct? We will use the upper hard point for the rear mount
> strut.
>
> Paul Lamar ...No rotor no motor.
Hi Paul,
As you mention, drawing FW-DWG2 is the correct layout for the 801. If
the thrust is lowered by the 56.94mm this will allow for a bit of
clearance, about 1", between the cowl and the modified water pump
outlet. There should be sufficient ground clearance as the Zenith
drawing BOTTOM-HALF.JPG describes 15.5" of ground clearance with the
Sensenich S76EM8 with the O-360 thrust location. Although when I scale
the distance from the stock thrust line to the ground on drawing
COWL-DIMS.JPG I come up with 48.31" which would leave about 10" at the
stock location and therefore slightly less than 8" if lowered by
56.94mm. What is your opinion on this modification? I would rather not
have to bubble the cowl if possible.
The top mount point attaches to the forward fuselage tubular frame at
the 40mm x 100mm plate with two 3/8" bolts.
Jerry, the engine is a 1988 13B, not the Renesis.
Thanks
Pat
13B not RX8/Renesis that changes things. Makes the alternator easier
to mount on the side. You need to cut your water pump down Pat.
I have a step by step to do that.
Paul Lamar ...No rotor no motor.
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