pawnshopmike
Staff member
Paint work is done on my Crack Fokker and a good start on assembly.
The 'What did you do in your workshop tonight?' thread
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yakken
100cc
nice, you should bring that to my event sept. 24th
BalsaDust
Moderator
On the 24th j will either be in TN at Nashbro or at my clubs fun fly. Seems to be a popular weekend for events though as I'm pretty sure the Rolla event is the same weekend.
BalsaDust
Moderator
So this is the fuel filler I mentioned yesterday that I made. Pretty simple to make and I think will work well. All I did was take a 3" long 10-32 brass screw (I'm sure anything will work I just choose brass as it was on hand and is a soft metal. Chuck it up in the lathe and cut the head off of it. Now square up the end and then bore a hole right through the middle of it. I went an inch deep to provide me with enough usable material. While still in the lathe go ahead and tap the end of the hole to 4-40 and only go about 1/4" deep with the tap. Now go ahead and cut the whole thing to the length you need. Use a disc sander to taper the ends a little so the fuel tubing will go on easier. Finally use two lock nuts to secure it to your fuse and hook it up. Once in I just grabbed a short 4-40 bolt and thread it in till its hand tight.
Snoopy1
640cc Uber Pimp
Let us know what you paid for the left hand tap and die. They are just out rages the price .
pawnshopmike
Staff member
@Decal Dennis turned me onto these a while back. http://www.bennettbuilt.com/shop/Tank_Accessories--BB_Fuselage_Fittings.html
BalsaDust
Moderator
Yeah I'm gonna get me some of those at some point. One of the guys I fly with has some and they are nice. What I made is kind of a copy of it.
I learned a valuable lesson, just recently, like, within past 2 days, and I would like to share this with you.
It deals with gassers and tuning.
I have friends, who tell me: "I have never touched my needles" since installing a brand new motor. And I guess, i figured, this was something to be proud of. "My engine runs great, and I have never had to mess with the needles".
I guess that sounds nice. Not bragging. Not arrogant. More of a matter of fact statement demonstrating that one person's good fortune.
I have heard this for years!
3 years ago, I purchased my 1st quad engine. And not only this concept of "don't touch the needles" was on my mind, but also, the fear of attempting to tune both carbs, and the chance of a dead stick, really scared the bejeebees out of me.
SO, for over 300 flights, I never did such thing, seemed to me, that it ran great. This was an airplane, with canisters (KS 95) and 2 into 1 headers.
I did notice, over the years, kind of like in the back of mind, almost sub conscious: "my airplane sure does seem lethargic...."
OK, be back to that soon....
then, 1.5 years ago, I got me a second quad motor, for another Yak. And, I did the same. Never messed with the needles and never "tuned" it, for fear of a dead stick. this was sort of a back up airplane, and a good friend, earlier this year, was able to fly this airplane in the unlimited class at a contest, and he made the comment : "looks like it is running out of steam on an upline, with two elements, one of which is a snap".
And I noticed this, and again, something in the back of my noggin, subconsciously, made a mental note of this. A tiny light bulb turned on, but not enough to make me do something about this.
be back to this soon....
then, this year, I built a third 40% for the fleet, another extra, and I put in a 3rd quad, this one, again, with the KS 95 cans and 2 into 1 headers.
and for some reason, I said, let me tune this baby. from Day 1, i tuned this puppy. Spent a good amount of time, with my friend, doing this, and then flew her, and WOW!! Is all i can say. I knew, now, there is a definite problem.
Imagine, all 3 airplane have same exact brand motor, same exact brand and size propeller, same exact exhaust system.
and using my onboard telemetry, i was able to compare the three of them, their peak rpm doing flight.
and an outstanding difference, between the 1st two, and the last one (which was tuned from day one).
here are my results:
if you do not tune your motor, when using canisters or tuned pipes, and run her rich, you will end up clogging the muffler system over time, also depends on what brand exhaust it is, but for the ones I used, I guess, they are sensitive to this. and the more rich it is, the sooner it will get there, that is, to less performance.
the 1st one, with over 350 flights now, I removed the KS canisters, and went with JTEC mufflers, and the increased performance is phenomenal. I am getting peak rpm, in the air now, of over 7100 rpm, turning a 30 x 13 EVO Mejzlik 2 blade prop.
the 2nd one, last night I did this, I spent over 5 hours, trying to tune it. came up with conclusion canisters were clogged, *with only 50 flights on her*, and removed the KS, and installed, semi new Pro Flows, and on the ground, gained over 300 rpm, again, same exact prop. I need to fly her and report back on the peak rpm in flight.
the 3rd one, peak rpm , in the air, was over 7300 rpm.
Well, I no longer have that airplane, since a tree grabbed it from the skies, but, the motor is currently at its birth place, getting looked at, and when it returns, its new home will be a Carden Pro.
SO, my message to you all, always tune your motor, from day one. DOn't think, "I never touched my needles" is a good thing. In fact, if you or anyone else ever says that, I will assume you are not getting top performance.
And if you want to learn how to really tune your motor well, which I did from this one gentleman, look at the thread by Terry, from Terry's Customs.
You all have a great day.
It deals with gassers and tuning.
I have friends, who tell me: "I have never touched my needles" since installing a brand new motor. And I guess, i figured, this was something to be proud of. "My engine runs great, and I have never had to mess with the needles".
I guess that sounds nice. Not bragging. Not arrogant. More of a matter of fact statement demonstrating that one person's good fortune.
I have heard this for years!
3 years ago, I purchased my 1st quad engine. And not only this concept of "don't touch the needles" was on my mind, but also, the fear of attempting to tune both carbs, and the chance of a dead stick, really scared the bejeebees out of me.
SO, for over 300 flights, I never did such thing, seemed to me, that it ran great. This was an airplane, with canisters (KS 95) and 2 into 1 headers.
I did notice, over the years, kind of like in the back of mind, almost sub conscious: "my airplane sure does seem lethargic...."
OK, be back to that soon....
then, 1.5 years ago, I got me a second quad motor, for another Yak. And, I did the same. Never messed with the needles and never "tuned" it, for fear of a dead stick. this was sort of a back up airplane, and a good friend, earlier this year, was able to fly this airplane in the unlimited class at a contest, and he made the comment : "looks like it is running out of steam on an upline, with two elements, one of which is a snap".
And I noticed this, and again, something in the back of my noggin, subconsciously, made a mental note of this. A tiny light bulb turned on, but not enough to make me do something about this.
be back to this soon....
then, this year, I built a third 40% for the fleet, another extra, and I put in a 3rd quad, this one, again, with the KS 95 cans and 2 into 1 headers.
and for some reason, I said, let me tune this baby. from Day 1, i tuned this puppy. Spent a good amount of time, with my friend, doing this, and then flew her, and WOW!! Is all i can say. I knew, now, there is a definite problem.
Imagine, all 3 airplane have same exact brand motor, same exact brand and size propeller, same exact exhaust system.
and using my onboard telemetry, i was able to compare the three of them, their peak rpm doing flight.
and an outstanding difference, between the 1st two, and the last one (which was tuned from day one).
here are my results:
if you do not tune your motor, when using canisters or tuned pipes, and run her rich, you will end up clogging the muffler system over time, also depends on what brand exhaust it is, but for the ones I used, I guess, they are sensitive to this. and the more rich it is, the sooner it will get there, that is, to less performance.
the 1st one, with over 350 flights now, I removed the KS canisters, and went with JTEC mufflers, and the increased performance is phenomenal. I am getting peak rpm, in the air now, of over 7100 rpm, turning a 30 x 13 EVO Mejzlik 2 blade prop.
the 2nd one, last night I did this, I spent over 5 hours, trying to tune it. came up with conclusion canisters were clogged, *with only 50 flights on her*, and removed the KS, and installed, semi new Pro Flows, and on the ground, gained over 300 rpm, again, same exact prop. I need to fly her and report back on the peak rpm in flight.
the 3rd one, peak rpm , in the air, was over 7300 rpm.
Well, I no longer have that airplane, since a tree grabbed it from the skies, but, the motor is currently at its birth place, getting looked at, and when it returns, its new home will be a Carden Pro.
SO, my message to you all, always tune your motor, from day one. DOn't think, "I never touched my needles" is a good thing. In fact, if you or anyone else ever says that, I will assume you are not getting top performance.
And if you want to learn how to really tune your motor well, which I did from this one gentleman, look at the thread by Terry, from Terry's Customs.
You all have a great day.