Comment

Comment by Scott Hunter on March 2, 2014 at 3:31pm

Volker & Bob, as I posted previous lengthy reply recently-I did not consider a variable pitch prop to get full potential, as the airframe parasitic + induced drag compromised any increased airspeed. Then, the the LSA rules came out, w/multiple rules - one being no variable pitch props. As Volker lives elsewhere, rules there most likely don't apply. I did use an electric pitch 66" Magnum 2 bl. warp on 912ULS on another current E.A.B. I have, & effective. Had toggle switch on console.  However, it weighed 22# 4 oz.w/ ULS spinner. The engine can handle it, but it's heavy on the geqrbox, dog ears/legs. Ronnie Smith + Phil Lockwood told me to change it....it would fly alright, but someday wouldn't start.  The 68" 3 Bl. tapered tip w/nickel leading edges = 10# 2 oz. This also allowed my to move my battery forward 4-5 ft. for accessibility, charging.

Comment by Bob Jones on March 2, 2014 at 3:11pm

The prop I am now using and am putting on my new 701 is the warp 3 blade,set at 11.5* for max take off , as in the float 3 second video, there are faster props available , but none stronger , I have blown snow with mine ,also many water take offs, with no damage, the foam core props wont take the same abuse , if you are not back country flying any prop will work , the turbo motors need a variable pitch to get their full potential , ...BOB

Comment by Scott Hunter on March 2, 2014 at 1:17pm

In the late 90's, through 2004, there were 3 of us in the U.S. that had 701's w/914 turbos. George Wood, Grand Jct., Colo. (ex Korean fighter pilot), as visited him; Danny Defulici-Gold 701 on floats in Florida; Danny well known via Chip Irwin + worked w/Chip in Sierra Miesto, Czech Rep.. bringing Zenith on barges to Florida, final assembly + N # there. I installed the 914 Turbo in the late 90's, being the 3rd, as the 912S/ULS was not available + opting not for the 80 ponies due to altitude. Point- Danny + I used Warp, 3 Bl. square tip 70". I had 11" clearance to ground, not opting for 72" for chuckholes in grass, etc. On a cool day, indicated = 2,050 ft. on climb. I modified fiberglass  cowling top for carb. clearance + side panels for airflow, + ceramic coated exhaust. As you are were mercury rises, do the same on your cowling, i.e. get the heat out. 70" Warp sq. tip is what you need.

Comment by Phil Smith on March 2, 2014 at 12:41pm

Volker,

I have a Warp Drive Three blade composite with leading edge nickle blades.  After talking with the good folks at W/D I used a 68 in dia setup set at 13.5 degrees.  This is with the 912ULS.  What I was looking for was after leveling at cruise altitude of about 5000 ft I would get around 5500 rpm full throttle - I get from 5500 to 5590 all that said it works very well and I am so satisfied that I don't change it. Google Phil CH 701 and look at the

take off video - that was a long time ago and I wasn't trying to max perform - but it gives a look at the acceleration...basically I shove the trottle to the wall count to three and pull back...whee!

Still grinnin

Phil

Stats:

CH - 701

empty wt 594

cruise rpm 5000... IAS low - mid 80's

TAS high 80's to low 90's at 5500

field elevation msl 3660

ambient temps up to 100 f

density alts vary up to 10,000 ft in summer

Comment by Thomas Jackson on March 2, 2014 at 12:14pm

HEY VOLKER,

I have a Warp Drive on my 701 with a 912s. The plane weighted in at 620# dry and it feels like a rocket on take off especially after flying Cessna's. A 701 with a 914 will be a bad boy/girl. My Warp Drive is set at 11 degrees which seems to work well, it has a nickel edge on the blades and is easy to maintain. The 701 can only fly so fast with all of the drag but that extra HP will sure make it get up and go!

Good Luck!

Comment by greg frank on March 2, 2014 at 11:59am

I TALKED TO ZENITH JUST 3 DAYS AGO ABOUT THIS SAME THING,SENSENICH 3 BLADE IS WHAT THEY TOLD ME.

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