Dynafocal engine mounts

[Nicknick]

Hi all,

I found to models on Grabcad, but both are slightly different and both have weird angles (like 29.2887098279779.....), no matter how I measure it... I don't believe, the original ones were designed with such angles and distances. I searched the interent as much as I could, but couldn't find any good information, there are tons of graphics for the conical engine mounts (which are simple parallel to each other) but none for the dynafocal mount.

I once had a drawing for that, but this was in my former company, maybe someone can help me out...

thanks!

 

[Scott Kenny]

Hi all,

I found to models on Grabcad, but both are slightly different and both have weird angles (like 29.2887098279779.....), no matter how I measure it... I don't believe, the original ones were designed with such angles and distances. I searched the interent as much as I could, but couldn't find any good information, there are tons of graphics for the conical engine mounts (which are simple parallel to each other) but none for the dynafocal mount.

I once had a drawing for that, but this was in my former company, maybe someone can help me out...

thanks!

I swear I worked on one in A&P school for our R985, but that would have been almost certainly pre-CAD... Well, pre-Computer Aided Design. Much Cardboard-Aided Design in that program!

 

[Nicknick]

I'm 52 and I remember drawing boards and research done by hundrets of paper catalogues...

I know, there is a service bulletin somewhere out there for an dynafocal engine mount which shows the correct instalation of the Lord rubber elements, and the dimensions...

I believe, the R985 is to old for having dynafocal engine mounts, but I could be wrong. The idea behind it, is that the engine weight and all forces during a hard landing can be transfered without sheer forces (compression) in the rubber elements so, that the rubber can be quite soft. A boxer engine is fully (six-) oder almost fully mass balanced (fourcylinder), so that almost only the torque variations must be decoupled by the engine mounts (by sheering the rubber elements).

BTW, I know that military submarines don't need to look out into the water, but wouldn't it be nice to have at least one camera? Could be usefull if some historic wreck is on the way or just for watching some fish passing by on a screen.