Sonny Furman
Active Member
Gentlemen: I have been lurking here for some time, but now thought it might be appropriate to offer a glimps of my latest redrive which I purpose built for my supercharged Honda B20B engine, slated for my in progress SE5a full scale replica. The photos are mostly self explanatory, and should the redrive cog pulleys look familiar, they are in fact Harley belt drive with 14mm pitch but now with a custom Kevlar reinforced belt to suit the application. The engine now in a test cradle was also set up on a dino and produced 215 HP at 5300 RPM which is the max I intend to run, considering an 80" prop and with the ratio of 2.14 to 1. Engine weight all up is 278 lbs which is a much better power to weight ratio than the Wolsely 150 HP originals which weighed some 450 lbs. yet still provided a cruise speed of 127 MPH for the SE5.
Having just turned 75, this is now my third homebuilt and likely my last, and with nearly 5,000 hrs in C-130E's I am still learning tail dragger skills. This redrive was done in entirely in my home shop with basic machine tools and at a cost of approx. $500 in materials. Note the double roller bearings for proper shaft support in axial and radial loads. The belt tensioner was fabbed from a Harley shift lever and two high speed skateboard wheels, while the rear cooling fan shroud is made from a cakepan. Necessity is always the mother of invention. While I am not selling these I am happy to offer details to those interested in building thier own.
Irv "Sonny" Furman, Col. USAF ret.
Having just turned 75, this is now my third homebuilt and likely my last, and with nearly 5,000 hrs in C-130E's I am still learning tail dragger skills. This redrive was done in entirely in my home shop with basic machine tools and at a cost of approx. $500 in materials. Note the double roller bearings for proper shaft support in axial and radial loads. The belt tensioner was fabbed from a Harley shift lever and two high speed skateboard wheels, while the rear cooling fan shroud is made from a cakepan. Necessity is always the mother of invention. While I am not selling these I am happy to offer details to those interested in building thier own.
Irv "Sonny" Furman, Col. USAF ret.
