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Normal Topic Noseblocks/Propblocks explanation and 1st example (Read 466 times)
Sky9pilot
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Re: Noseblocks/Propblocks explanation and 1st example
Reply #4 - Jan 28th, 2021 at 3:51pm
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Here's an assortment of noseblocks I have made over the years...
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« Last Edit: Mar 28th, 2021 at 9:27pm by Sky9pilot »  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Re: Noseblocks/Propblocks explanation and 1st example
Reply #3 - Jan 28th, 2021 at 3:48pm
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Commercial adjustable propblocks, shafts and bearings from Volare Products & Peck-Polymers:
1. Gizmo Geezer
2. KP adj block
3. KP ball bearing bushing
4. Peck-Polymers Prop shafts
5. Peck-Polymers nylon bearings
6. "        "           Lg bearings

Even these commercial noseblock will need somekind of removable arrangement for winding motors and adjustments.
  

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If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Sky9pilot
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Re: Noseblocks/Propblocks explanation and 1st example
Reply #2 - Jan 28th, 2021 at 3:34pm
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Another noseblock/propblock type is the radial engine on one of my biplanes the New Standard D21.  Here the whole enging became the propblock and  it was drilled with down thrust of 3 degrees.
  

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D-25s_Wright_side_view_001.jpg

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Sky9pilot
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Re: Noseblocks/Propblocks explanation and 1st example
Reply #1 - Jan 28th, 2021 at 3:30pm
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This type of noseblock can vary with builder and his preference.  A cylindrical nose block drilled at a 4 degree angle and rotated in the nose of the fuselage will will allow down and side thrust adjustment to be achieved just by rotating the noseblock/propblock.  Here's a picture of this model propblock.
Once trim is established for model the cylindrical block can be keyed by filing a slot for a ply key to fit in slot in fuselage so the nose block will not rotate anymore.  Just mark the block when desired trim is reached.

Here's a link to our prop section that deals with this type in great detail by Mike Isermann: Click Here
« Last Edit: Mar 28th, 2021 at 11:43pm by Sky9pilot »  

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If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Sky9pilot
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Noseblocks/Propblocks explanation and 1st example
Jan 28th, 2021 at 3:26pm
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The noseblock can be constructed in many different ways.  You can build a box from balsa sheet, solid block of balsa, laminated sheets of balsa. 
Or you can make a round/cylindrical noseblock from a block of balsa or laminated sheets of balsa that is turned on a drill press, lathe, or variable speed hand drill. 
There are also adjustable propblock/noseblocks that can be purchased from Free Flight Suppliers such as Volare, Peck Polymers, Easy Built etc.

This first noseblock is very simple construction using a thin 1/32" ply disc with a laminated balsa block on the back of the ply disc which will fit into the nose of a radial engine cowling.  I think the picture of the noseblock will be pretty self explanatory.  The prop bushing is a brass tube and the hole for the tube is drilled at an angle to give approximately 3 degrees down thrust.  Side thrust is achieved by shimming the sides of the block in the needed direction.
  

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If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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