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Old 12-17-2010, 05:56 PM
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mbauer mbauer is offline
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Location: Nikiski, Alaska -9UTC/-8UTC DSTime
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Ceramic Paper Insulation Wrap

Hi Chris-Thanks for the comments! I can't wait to fire this thing up!

Stainless Steel Spring Wire is used to attach the Ceramic Paper Insulation as shown in the photos below.

The servos for the flight controls have been installed. The remaining servo will be mounted to the fuel line/shut-off valve. The servo arm will be attached directly to the valve handle.

Servo attachments use ball-end to plastic clevis connectors. Gold-n-Rod allows direct force to be applied to the control surfaces.

I'm using full size (=Heavy) servos that weigh 1.6 ounces each. Lots of torque available.

Rudder has a control horn with a rotating ball-end.

Same type of horn will be used for the Elevator. It has not been hooked up yet - might change a few things and then re-do the Elevator = at issue is how it clears the fuselage when in operation. Thinking of doing it a better way.

The wings are beginning to look like the original way designed might have some issues when attaching.

They might get a whole new look. Basically found some triangle balsa strips that are an exact match "Almost" for the wings. The wing airfoil is a symmetrical shape. This means it has the exact top and bottom shape.

Photo showing the balsa wood with the aileron rib/carbon control arm on top. The balsa wood has a flatter bottom angle than the top side of the triangle. This changes the shape of the bottom airfoil, which will change the stall speed.

The big advantage to using the balsa wood; they are less prone to warping. Due to humidity changes the paper could warp. If they warp the shape/stall speed of that wing changes. This causes spins when the model stalls.

Contemplating if the balsa wood changes are worth the change over. They would affect both wings the same. Warping of the individual ailerons will be different.

This model has an extremely high wing loading when compared to gas powered "scale" models (around 25-oz per sq ft). After doing some internet calculations using on-line calculators to verify my original math, the wing loading went down slightly to 30.06 oz-sq ft.

Hanna Reitsch was tasked with going to altitude and finding out why the piloted versions crashed on landing (Fieseler Fi 103-R). She determined that the landing speed was too high. Which was partly caused by the high wing loading of the original.

Designed from the start with much larger wings, this model also has ailerons on the wings. The WWII version used elevons for pitch and roll control. This was one reason why sliding a wing underneath and tipping them work so well.

Doing a weight check of the model shows it might weigh in around 3.5lbs instead of the 3.28 lb estimate. Still below the 4.5lb max.

Waiting until Monday for delivery of the fuel system parts. Living this far north has its share of shipping disadvantages...

Model is 85% done.

Best regards,
Mike Bauer
Attached Thumbnails
BUZZZZZZ Pulsejet Powered Paper Airplane Project-ceramic-insulation1.jpg   BUZZZZZZ Pulsejet Powered Paper Airplane Project-ceramic-insulation2.jpg   BUZZZZZZ Pulsejet Powered Paper Airplane Project-aileron-wood.jpg   BUZZZZZZ Pulsejet Powered Paper Airplane Project-spitfire-tipping-v-1.jpg   BUZZZZZZ Pulsejet Powered Paper Airplane Project-fi-103r-reichenberg_1945.jpg  

BUZZZZZZ Pulsejet Powered Paper Airplane Project-v-1-cutaway.jpg  

Last edited by mbauer; 12-17-2010 at 06:07 PM. Reason: edits explaining photo of balsa wood triangle.
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