Hoellein Innovation Building Instructions

Building instructions

Congratulations, you have chosen a quality product MADE IN GERMANY.
Please read these instructions carefully before beginning construction and then proceed
with the step by step construction.

General information about the model:

The INNOVATION is a small electric glider (or sailplane) with fully-sheeted wings.
Despite the low flying weight, the model can be flown even with some light winds.
The wing profile MB 971 is used and contributes to this models ability.
With conscientious structure, higher speeds can be achieved.

Tools and adhesives:

Modelling knife, small balsa plane, 100 and 320 grit sandpaper, a straight building board about 50 x 90 cm
Superglue, thin CA and thick CA . UHU plus fast or 5 minute epoxy.
The corresponding pictograms are inserted in the individual construction sections for the adhesive notes.
White glue can also be used for wood joints. However, it is not as easy to sand and causes slightly higher
weight. The parts should all be allowed to fully cure and be secured with needles or weights.

Construction:

The temperature and humidity of the plan can lead to dimensional differences to the components.
The adhesives given in this manual are only suggestions.
For large-area gluing, a thick liquid adhesive is suitable. To do this apply the adhesive to the component and
then "float" and align. Do not worry, the component can still be moved.
Now press the component at a corner, check, press on the opposite corner as well.
If everything fits, press the entire component.
The side panels are reinforced in the required areas by doublers made of balsa or plywood.
The ribs and the spar web are pre-cut.
The wings are built in three parts and are fully sheeted.
Due to the low profile thickness, tie bars are used.
The spar web and the ribs are inserted into the lower sheeting for a simple construction.
To sand the airfoil, profiled templates are attached for the important leading edge.
The wings of our test models were covered with ORACOVER.
The rudder deflections given in this manual are a basic setting for the first flights.
These can easily be adapted to your style of flying.

ENJOY your Innovation!

• Cover the blueprint with saran wrap (clear plastic).

• Glue the lower sheeting for the center panel, part F1 and F2 together.

• Glue together the upper sheeting for the center panel, part F3 and F4 together.

• Glue the lower sheeting for the outside panels F5 and F6 together.

• Glue together the upper sheeting for the outside panels F7 and F8.

• All surfaces should be sanded on both sides until no more transitions can be felt.

Innovation Assembly Manual (EN) V9

• Glue the web spar for the center panel, part F9 to the lower sheeting F1 / F2.

• Glue the web spars F10 for the outer surfaces of the lower panel F5 / F6.

Caution: make sure that you make a left and a right component.

• Line up the lower panels F1 / F2 and F5 / F6 at the rear edge up to the dotted line on the plan (evenly).

Temporarily insert the respective outer ribs into the indentations. Use a soft pencil and draw a line from one rib
end to the other. Use a sanding pad to sand down the angle at the trailing edge.

NOTE: The goal is to have the trailing edge at 0.5mm thick.

• The plywood ribs F11 should be glued to the middle rib F12 on both sides.

• Glue together F27 wing anchorage. Wing anchorage will be glued AFTER covering.

• Assemble and glue ribs F13 at their given positions on the sheeting F1 / F2 and on the web spar F9.

• Glue the center rib F11 / F12 and the reinforcement F12a at the specified position.
Line up the hole in the reinforcement with the hole of the lower sheeting.

• Attach the connecting ribs F14 to the sheeting F1 / F2 and to the web spar F10.

Caution: The ribs F14 must sit against the angle of the spar F10.

The angle of the spar is what creates the V-shape of the wing.

Innovation Assembly Manual (EN) V9

• Insert and glue ribs F15 - F21 at the predetermined positions on the panels F5 / F6 and to the web spar F10.

• Attach the connecting ribs F14 to the sheeting F5 / F6 and to the spar F10.

Caution: The ribs F14 must sit against the angle of the spar F10.

The angle of the spar is what creates the V-shape of the wing.

• Insert the leading edge F22 into the recesses of the ribs for the center panel.
If the leading edge lines up well with the ribs and the sheeting then glue in place.

• Insert the leading edge F23 into the recesses of the ribs for the outer surface parts.
If the leading edge lines up well with the ribs and the sheeting then glue in place.

• Plane or sand the leading edge following the profile. See also section D and E.
While sanding, be careful not to damage the ribs. (Tip, use tape to mask ribs)

Innovation Assembly Manual (EN) V9

• Glue the upper sheeting F3 / F4 to the center panel.
Make sure to add glue on all ribs, the spar, the leading edge and the angled trailing edge of the lower sheeting.
Position the upper sheeting and secure it with needles and weights.

Caution: To get a flat and straight wing, the wing center section should be left until fully cured.

The upper sheeting must be pressed at all gluing points.

• Glue the upper sheeting F7 / F8 for the outer surface parts.
Use the same procedure as used for the center panel.

• Cut the overhanging sheeting on the leading edge and the sand the leading edge of the center part using the
stencil S14.

• Cut the overhanging sheeting on the leading edge and the sand the leading edge of the outer panels according
to the templates S15, S17, S19 and S21.

Note on positioning the templates: template number corresponds to the rib number.

The leading edge F22 should not be visible after sanding. See also section D and E.

• Sand the sheeting at the trailing edge. (follow the airfoil)
The trailing edge should have a thickness of approx. 1mm.

• Carefully sand the sides of the middle section carefully, with the exception of the connecting ribs F14.

• Carefully sand the sides of the outer panels, with the exception of the connecting ribs F21.

Note: To verify the V shape, the F26 joiner can be used upside down (only to verify angle).

Innovation Assembly Manual (EN) V9