Author Topic: Raising the Landing Gear (Read 5130 times)

Kiwi55 · « **on:** June 11, 2019, 10:55:24 AM »

As I had mentioned in my last post I need to increase the prop clearance (a lot). This is due to using a 68" prop on a Rotax 582. Having not thought this through

when I originally built the landing gear. I will have to build new landing gear.
I raised the engine 3" from my mock-up position, but I also need to raise the front of the airplane an additional 6" to give me 9" of prop clearance in a level stance. Oh well... time to get on with it.

oneagle · « **Reply #1 on:** June 15, 2019, 05:56:36 AM »

Always a pain to redo work you already completed. How did you determine that 9" was the amount of clearance you needed?

Kiwi55 · « **Reply #2 on:** June 17, 2019, 06:01:51 AM »

I mocked everything up. Mounted the engine using an old engine mount. In level flight attitude I had less than 1" of ground clearance. I understand 9: is considered the minimum, and that is with flat tires and landing gear fully compressed. I mounted the engine 3" higher on the firewall and then added 7" to the landing gear. It's almost done

...

Dan_ · « **Reply #3 on:** June 17, 2019, 01:19:30 PM »

Is the prop shaft on the gearbox mounted in the up orientation...?

Gotta ask

Kiwi55 · « **Reply #4 on:** June 18, 2019, 09:09:14 AM »

It is mounted up. So is the engine.
The problem is that the plans call for a VW engine with a 54" prop (or there abouts) and I'm using a 68" prop.

Dan_ · « **Reply #5 on:** June 18, 2019, 01:18:37 PM »

Here are a couple of links for prop calculators that look interesting...
http://godolloairport.hu/calc/strc_eng/index.htm

http://godolloairport.hu/calc/opc_eng/index.html

Kiwi55 · « **Reply #6 on:** June 19, 2019, 05:50:05 AM »

For calculating prop pitch I use a calculator on Culver Props website...

MrG · « **Reply #7 on:** July 22, 2019, 11:57:30 PM »

I have 4 in, in flying attitude, you would be amazed how high the tail has to be to get it to hit the ground
if you are in that situation - the propr would not be the concern - pick up the parts of the plane wouldf be the worry

Author Topic: Raising the Landing Gear (Read 5130 times)

Kiwi55

Raising the Landing Gear

oneagle

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Kiwi55

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Dan_

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Kiwi55

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Dan_

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Kiwi55

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MrG

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