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dptp9lf · 01-13-2008, 01:52 PM

Hi mfuess...
I came really close to putting the ZDZ Super 80 on the aircraft attached which is a Jack Devine R4 Firecracker. http://www.jackdevinemodels.com/firecracker_r4.htm I opted out and went with a Aeroworks 75cc Extra 260 as I don't really have the time to build the R4 and I also like IMAC aerobatics.
I was looking at speeds of 140+ when researching it. I was sold on Supercool's props http://www.supercoolprops.com/price_list2.php He recommended the 18X20F1 that many of the USRA guys run on 100cc engines... that's what he told me anyway. These props are $100. That prop seems to me like it would be about the right size for your 50 but it would be an expensive test.
I also attached my prop chart which you probably already have something similar.
Looks to me like you hit a wall with it and it's going to take something drastic to get through.
Cheers,
Lyle

01-13-2008, 01:52 PM	#110
dptp9lf Let's Git'er Done! Join Date: Aug 2007 Location: Calgary Alberta Canada Posts: 47	Re: H9's Sundowner Hi mfuess... I came really close to putting the ZDZ Super 80 on the aircraft attached which is a Jack Devine R4 Firecracker. http://www.jackdevinemodels.com/firecracker_r4.htm I opted out and went with a Aeroworks 75cc Extra 260 as I don't really have the time to build the R4 and I also like IMAC aerobatics. I was looking at speeds of 140+ when researching it. I was sold on Supercool's props http://www.supercoolprops.com/price_list2.php He recommended the 18X20F1 that many of the USRA guys run on 100cc engines... that's what he told me anyway. These props are $100. That prop seems to me like it would be about the right size for your 50 but it would be an expensive test. I also attached my prop chart which you probably already have something similar. Looks to me like you hit a wall with it and it's going to take something drastic to get through. Cheers, Lyle Attached Thumbnails 14.5 KB · Views: 53 Attached Files prop_chart.zip (3.0 KB, 41 views)