VM Ist dieses Sperrholz für den Bau eines Velomobils geeignet?
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Le bois Meranti (dark red)
Bois Meranti : duramen brun-rouge, excellent en menuiserie intérieure, contre-plaqué et menuiserie extérieure selon les essences.
www.houtinfobois.be
It is going to be a little heavy and might not be as easy to bend as pure okoumé. But it will be very strong, ideal for a daily driver e-Agilo for example.
My suggestion would be to combine it with poplar.
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@anotherkiwi
Is this type of plywood suitable for making ventec? The thickness is only 2.8mm.
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It will be a heavier Ventec, probably about 1.8 kg heavier than mine. But of course it will be a lot stronger and stiffer. If you want to chat about mixing poplar and this wood we can do that by PM if you want.
When you have sanded 3 mm poplar you will also be 0.2 thinner, that is not a problem.
When you have sanded 3 mm poplar you will also be 0.2 thinner, that is not a problem.
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It looks like the tree plys are not equaly thick. Looks like one thicker in the centre and then two thin veneer sheets on the outside. If i see it correctly?
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OK that is not good if it is too thin. My old eyes need to be looking at a sample and not a photo 
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The second picture was what gave it away to me. It's just an optical impression from a picture, wich is not as good as a real sample. The difference there seems so big that it would not wonder me if both outer plies together are less or just about equaly thick as the center one. That would be to far off from optimal to me.
There is a big difference between realy high quality plywood and budget quality plywood. Poplar is mostly available in the lower price ranges, mostly not WBP glued. Yet its other properties, lightweight and easy to bend, make it good for the use in Velomobile shells. If properly protected. With that you also accept less than optimal quality material.
As a well designed shell is self supportive and relies on wide fillet joints, there are few small points with very high loads, often those can be strengthend with extra layers. As the load is mostly spread over a large area, the load per cm2 is relativly small. Key is to have the maximum loads always within the safe load limits for the wood. Wood is a natural material and varies quite a bit. In weight, densety and strengt, within the same wood species, with many trees even depending on core wood vs outer wood. This causes a large inaccuracy in the material properties, so the need for a larger safety margin than when calculating in steel for example. You need a much larger margin than 10% caused by it being a tiny bit thinner.
Bruynzeel WBP Okoume is very good plywood, available for a very high price. It is very strong, it has a very high quality of all veneer layers not just the outer layers. But it is also less willing to bend, heavier, it might not even make the curvature needed.
If you want to build the Agilo or Ventec kit, you can trust the engeneering behind that. If you want to build something pretty close to that, inspired by, you can also use it as a base. If the 3 layers 3mm Poplar are enough to support the weight on the Velomobiel front struts of VM and rider, that might also be enough for yours.
Your starting at the wrong end of the question. What is suitable can only be assesed if one can estimate wich requirements the material must meet.
If you have no idea of the requirements, the question can never be answered correctly. It would be good to get a better understanding of the requirements first.
There is a big difference between realy high quality plywood and budget quality plywood. Poplar is mostly available in the lower price ranges, mostly not WBP glued. Yet its other properties, lightweight and easy to bend, make it good for the use in Velomobile shells. If properly protected. With that you also accept less than optimal quality material.
As a well designed shell is self supportive and relies on wide fillet joints, there are few small points with very high loads, often those can be strengthend with extra layers. As the load is mostly spread over a large area, the load per cm2 is relativly small. Key is to have the maximum loads always within the safe load limits for the wood. Wood is a natural material and varies quite a bit. In weight, densety and strengt, within the same wood species, with many trees even depending on core wood vs outer wood. This causes a large inaccuracy in the material properties, so the need for a larger safety margin than when calculating in steel for example. You need a much larger margin than 10% caused by it being a tiny bit thinner.
Bruynzeel WBP Okoume is very good plywood, available for a very high price. It is very strong, it has a very high quality of all veneer layers not just the outer layers. But it is also less willing to bend, heavier, it might not even make the curvature needed.
If you want to build the Agilo or Ventec kit, you can trust the engeneering behind that. If you want to build something pretty close to that, inspired by, you can also use it as a base. If the 3 layers 3mm Poplar are enough to support the weight on the Velomobiel front struts of VM and rider, that might also be enough for yours.
Your starting at the wrong end of the question. What is suitable can only be assesed if one can estimate wich requirements the material must meet.
If you have no idea of the requirements, the question can never be answered correctly. It would be good to get a better understanding of the requirements first.