Razor-RCU

My Feedback: (50)

Well I was fortunate to get another K&B-7.5cc DF engine for my old beat-up Whilpash-X. This K&B has a unique looking muffler/ pipe though. Reminds me of Star Trek or something...

I ran it for a minute just to hear it.....uh.....good thing my local field does not have a sound limit!

I know this will not be a record breaker but it is a step-up for me... Now I better go back to my PM's and see what Bob told me to do with break-in.

Just thought it looked interesting enough to post here-

freakingfast

My Feedback: (3)

Going to warp 9 you say?

vertical grimmace

My Feedback: (1)

Thats one of those flow through mufflers. Not legal in AMA racing. I think Super tigre sold some engines with them. Never owned one but I guess it would help pull the exhaust out of the engine.

HaveBlue

As i said elsewhere..I like this idea...cool looking pipe...can you post some breakin advise bob mentioned to you..so far I've got
"run it on light load prop..get it up to about 20,000 rpm( get it up to temp quick) for at least 5 minute burts

the other thing is I dont have a pipe yet..going to find out what the difference between the marine pipes and aero pipes are as theres a bit of a price difference(on Macs site) and boat motors really pull some rpm..

Crazy4Flight

My Feedback: (540)

I don't think so, more like impulse.

now beem me up Scotty

Razor-RCU

My Feedback: (50)

LOL Crazy-

Haveblue- You are putting yours in a Whip-X also? Nice!!

I need to pester Bob more since I pretty much ignore the paperwork and go with what he says....A better engine authority there is not, IMHO.

I will let you know when I know

I sure wish my Whip-X was fresh out of the box like yours....

Kmot

My Feedback: (24)

That is one of the coolest looking mufflers I have seen!!

I bet it is either a Semco or a Slimline product. Both made those flow-thru mufflers back in the day.

And you are right, it is Star Trek Enterprise for sure!

proptop

My Feedback: (8)

Pretty sure it's a Macs Q500 "muffler"

It doesn't actually muffle very much...but sure looks cool huh?

I have a Newton muffler (IIRC the guy I got it from said Tommy Newton from Texas I think?) that looks a bit like a "Cherry Bomb" attached to a short fuselage top header...it reminds me of the old chambered pipes that came on certain late 60's Camaros and Vettes [8D] and only knocks 300 r.p.m. off.

Razor...I saw that engine/muffler on epay and almost bid, just because of that cool looking muffler...but I already have enough K&B stuff to last me a while...


P.S. Anybody heard of "Tommy Tigre"? Some of the K&B 6.5 heads I have have that name engraved in them.

Kmot

My Feedback: (24)

Ahhh....... MAC mufflers. Yup, forgot that one.

HaveBlue

LOL..wait till you see it after the first flight..might be going back into a box....not sure how big a box...[X(]

Razor-RCU

My Feedback: (50)

This your first Whip?

Got strong servos?

HaveBlue

Ive got 15kg torque servos..downfall..there metal geared..yes my first Whip..

Razor-RCU

My Feedback: (50)

Wow! Now if I just knew how much a KG was...

I run Hitec-645MG's (107oz @ 4.8V / 133oz @ 6V) and they work well. The centering is not the best but I need the muscle.

I am having a hard time getting it to run with the pump- It is supposed to be preset at the factory but it did not fire for me....I bypassed the pump and she started pretty quick-

HaveBlue

15kg= 208oz@6volt these aren't the best but they are fast, I think .06 sec for 60 degrees

if memory serves me right, i think someone told me to by-pass the pump, and or remove it and put in a normal backplate.. pity these aren't drum induction engines

HighPlains

My Feedback: (1)

Tom Christopher built those engines.