carlnoki
Well-Known Member
- Joined
- May 1, 2004
- Messages
- 1,364
Chris;
i went to teh lake yesterday and did a bit of testing on the 21's using no nitro fuel.
engine set as follows: 21 Green Head LS
fuel mix: 15% Klotz/85% Meth.
head clearance: 5 and 6 thou.
carb: standard CMB
pipe: Brown 21 long pipe (smaller volume) and picco 7015 small volume 21 pipe with 90 degree stinger
glow plug: o'donnell red dot (hot heat range) and Tower Hobbies plug (hot heat range)
props: Grim 38-55 for breaking in
Grim 38-63
ABC 1516/3
ABC 1716 cut to 39mm dia.
ABC 1717 cut to 39mm dia.
took a bit to get the needle set for starting purposes, but with a little persuading i had it going in about 1/2 hr.
the launching was as per the norm, throttle responce was a bit slower compared to nitro fuel.
speed was also down a bit from nitro fuel (60%). with the green head is was able to get and maintain a solid 66 mph with the Brown pipe and 65 mph with the old picco pipe. The motor cooling was regulated with a wheel collar just off the nipple at the rudder blade. temp was monitored with a lazer temp gun. really had to pinch off the water to almost none at all to get the motor to heat up to a reasonable temp. (remember, its winter out there). best performance was with the o'donnell plug. head clearance finally set at .006". .oo5 was a bit too tight. pipe length set at 3" measured along side the motor to the high point on the pipe.
next testing will be with an added 5% Prope. Oxide added to the fuel mix.
if there is anything i can try for testing purposes that iam able to do folks, please suggest it to me and i will give it a go if i have it and am able to do so.
this is just a testing of straight fuel to see what the outcome is heading towards in the event ONE DAY we do happen to run out of nitro.
REMEMBER< THIS WAS JUST A TEST,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
carl
p.s. dang, i am doing more water time now than when the season was under way :lol: :lol:
i went to teh lake yesterday and did a bit of testing on the 21's using no nitro fuel.
engine set as follows: 21 Green Head LS
fuel mix: 15% Klotz/85% Meth.
head clearance: 5 and 6 thou.
carb: standard CMB
pipe: Brown 21 long pipe (smaller volume) and picco 7015 small volume 21 pipe with 90 degree stinger
glow plug: o'donnell red dot (hot heat range) and Tower Hobbies plug (hot heat range)
props: Grim 38-55 for breaking in
Grim 38-63
ABC 1516/3
ABC 1716 cut to 39mm dia.
ABC 1717 cut to 39mm dia.
took a bit to get the needle set for starting purposes, but with a little persuading i had it going in about 1/2 hr.
the launching was as per the norm, throttle responce was a bit slower compared to nitro fuel.
speed was also down a bit from nitro fuel (60%). with the green head is was able to get and maintain a solid 66 mph with the Brown pipe and 65 mph with the old picco pipe. The motor cooling was regulated with a wheel collar just off the nipple at the rudder blade. temp was monitored with a lazer temp gun. really had to pinch off the water to almost none at all to get the motor to heat up to a reasonable temp. (remember, its winter out there). best performance was with the o'donnell plug. head clearance finally set at .006". .oo5 was a bit too tight. pipe length set at 3" measured along side the motor to the high point on the pipe.
next testing will be with an added 5% Prope. Oxide added to the fuel mix.
if there is anything i can try for testing purposes that iam able to do folks, please suggest it to me and i will give it a go if i have it and am able to do so.
this is just a testing of straight fuel to see what the outcome is heading towards in the event ONE DAY we do happen to run out of nitro.
REMEMBER< THIS WAS JUST A TEST,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
carl
p.s. dang, i am doing more water time now than when the season was under way :lol: :lol: